Develop Bugs

.:: HELP Appreciated ::. Universal - WHITE SCREEN Problem...

.:: HELP Appreciated ::.
Hello Tech GURUS,
I returned from a long tour (I kept my XDA EXEC at home) & found that my XDA EXEC has got a problem of WHITE SCREEN!! Nothing is Displayed!!
May be brother's childrens or anyone of my friend accidentally did it in my absence(Sorry I'm NOT Sure). May be they pivoted (Turned) the screen in a WRONG DIRECTION!
That doesn't matter WHO DID IT, But the problem screwed my head & I started to trace the problem.
Symptoms:
1) Only WHITE SCREEN(with LCD Backlight), Nothing Else.
2) Charges perfectly through USB & also from Charger.
3) When I connects it to ACTIVE SYNC, it Syncs fine & I can able to explore the files/folders. Copy from & to the handset memory is also works fine.
4) Tried to enter into BOOTLOADER Mode(by pressing Light+Power+Reset), there also got a BLANK SCREEN (NO LCD Backlight).
5) TOUCH SCREEN detects TAPs & make sounds (Tick Tick), That indicates Touch Screen Working fine.
6) Qwerty KeyBoard Works fine. I don't know at what extent, since I can't see nothing on screen. But when I press a key on QWERTY Kbrd, it sounds Tick.
7) Transfered(Beamed) a CONTACT from my another XDA IIi & found Its accepted the beamed data.
8) Volume Up/Down make sounds (Tick, Tick...).
What I Did:
1) Removed the Battery & re-inserted & tried to BOOT it. NO result, just a WHITE SCREEN.
2) Purposely Tried to Rotate the Screen in Wrong Direction to test the loose contacts of co-axial cable.
3) Lastly Dis-Assembled the whole handset (Removed all parts 100%) & Re-Assembled it. But the Problem remains SAME.
4) Dis-Assembled again & this time I tested the LCD Co-Axial Cable's connectivity from MainBoard side connector to LCD Side Connector. There are 2 Cables which connects to LCD. One is 30 Cores Cable & Second one is 40 Cores Cable.
I Successfully tested 30 Cores Cable(Actually it used only 28cores cable, remaining 2 points at connector are DUMMY) & Second 40 Cores Cable I'm UNABLE to Test Since I lost my patience while connecting my Testing Meter to Hair Line sized cores & in just an 10mm connector got 40 cores!!!
5) Observed all cores which passes through SCREEN ROTATOR BASE Hinges & found there is NO physical Damage or CORE CUT.
CAN ANYONE HELP ME TO SOLVE THIS WHITE SCREEN PROBLEM?
IS IT A HARDWARE BASED PROBLEM? OR SOFTWARE BASED?
IS IT A PROBLEM WITH DISPLAY CHIP(IC) ON MAINBOARD?
JUST CONFUSED & SEEKING HELP FROM TECH GURUS.
THANKS IN ADVANCE.
HellCrusher.

Hi hellcrusher,
CAN ANYONE HELP ME TO SOLVE THIS WHITE SCREEN PROBLEM?
IS IT A HARDWARE BASED PROBLEM? OR SOFTWARE BASED?
IS IT A PROBLEM WITH DISPLAY CHIP(IC) ON MAINBOARD?
Click to expand...
Click to collapse
This seems to be a hardware problem. Check connectors in the display housing first. This unit is quite easy to disassemble.
Before you start, you should have a look in the universal SERVICE MANUAL to check out how it gets torn apart .
If all connectors to the display are right in place, but your display still shows nothing ...open the universal body too.
Folow the steps in the manual
Regards,
scholbert

White Screen
Hello, this is my first post. May I first just say how great I think this site is, the guides on here really are useful to beginners.
With regard to the white screen, not sure if this helps, but during dismantling of my various PDAs, I managed to connect an LCD ribbon incorrectly, I kind of forced it in & folded one contact over, resulting in white screen. Disconnected, straightened & refit. Hey presto, works like a charm. Hope this helps.

I had the issue, had to buy a new flat cable
It is rare to actually see the damage to the cable, because the damage is inside the insulation....
Best regards!

On the topic...
Hello!
I have a similar issue with my Orange SPVm5000, except that mine will work for up to a minute after a hard reset before going to a white screen.
If I hard reset pressing the left+right+reset keys, the device shows the boot screen and sometimes ever goies into the initial setup but then all of a sudden it goes white. I've opened up the screen and verified and reconected all connections but still the problem persists. Also I've noticed that its not any action I make that causes it; more like a heat/timing issue. Per advice above, I will check the connections in the body but does anyone have any other ideas?!?
Thanks!
Greg.

I have a similar problem. The story;
I purchased an orange branded M5000 on flebay described as second hand in fantastic condition blaa blaa.
When the phone eventualy turned up it had no manual, the outer sleeve of the box was missing and the wrong usb cable was supplyed (one of those larger usb plugs you usualy get for printers.
I have shedlooads of cables and rely wasn't bothered about any of these problems at the time and went about charging the phone (it was totaly flat)
When fully charged I stuck my sim in and poweded her up the phone works fine in portrate and landscape view but as you rotate the screen so it is inline with the keyboard the screen fades to white about half way.
I contacted the seller who basicly told me the phone is second hand so sold as seen!?!?!?
I have flashed various roms on it to see if it was a software fault but nothing.
I think this phone had been in storage as its battery was totaly flat and incorrect accessories suggest the seller didn't check it before shipping. So I believe there is a problem with this phone that occurs when stored.
Sorry for the long post

Have you flashed any rom or just had this problem ...
my conclusions:
1. If you have flashed a new rom to your universal, try to reflash the original rom, it works for many users.
2. If you havent flashed any rom, maybe its a hardware problem.
2.1 If you just used it in a bad way, (ie: rotate screen in wrong way), dissamble it..
2.2 If you have let it on a heat, weat, etc.. place.. maybe the mainboard got a cut-circuit.
Saludos

I tryed a couple of popular WM6 roms (I forget whitch ones) and returned to the genuine Orange WM5 rom. So I doubt its a software fault.
As far was extreme conditions go the phone was well packaged when posted I will gove that to the seller SO unless the eposure happened before shipping I don't think thats to blame ether.
I think the wire in the swivle joint is failing and will continue to get worse as the joint is exercised.

Try to clear it up..
Hi there,
i made a lot experiments with the uni, so let me try to focus what's wrong:
First LVTato's Orange SPVm5000
...
If I hard reset pressing the left+right+reset keys, the device shows the boot screen and sometimes ever goies into the initial setup but then all of a sudden it goes white. I've opened up the screen and verified and reconected all connections but still the problem persists. Also I've noticed that its not any action I make that causes it; more like a heat/timing issue. Per advice above, I will check the connections in the body but does anyone have any other ideas?!?
Click to expand...
Click to collapse
Sounds like the image could not be loaded completely.
The framebuffer is initialized correctly after cold boot, but afterwords booting into wince fails.
So maybe it's pure software issue (flash content is corupt -> image is broken).
Other possibility: Some region of your flash is damaged (more hardware related).
jahshappybus' Orange SPVm5000:
...
poweded her up the phone works fine in portrate and landscape view but as you rotate the screen so it is inline with the keyboard the screen fades to white about half way.
Click to expand...
Click to collapse
Looks to me like a typical cable issue. Maybe someone twisted the screen the wrong way!
So this is what i guess at least.
Regards,
scholbert

White screen
99 % of these white screen faults is a typical cable issue. And you don't have to twist your screen wrong way to have this problem, also.... just twist it too often First you have to see if the device is working, apart the screen.... call the number of your phone see if it is just screen related problem. Broken display cable will leave your device oprational, you just don't see the image.
I know it is "less painfull" for people to think it is a software problem.... (The "it would not happen to me" syndrome ) but sometimes things just brake, and moving parts are most risky...
The fact you don't see the damage is of no importance due to the size and nature of the damage. Don't expect to see broken wires in the cable. And even if you check the cable by you instrument, somethimes it will show you it's ok, but in some positions it will loose contact.
Try a different cable... that way you'll be sure.
Best regards, and all the luck!

"Looks to me like a typical cable issue. Maybe someone twisted the screen the wrong way!"
I agree and luckily, finally paypal do as well.
It is being boxed up to a red faced seller as we speak.
A happy ending for me (speaking to soon?)

i hav the same problem as u "HELLCRUSHER" and i flashed also but was not able to cure
still hav this white screen ..

Found this link for some where selling the screen cable assmebly.
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=300254338133
Hope this is of use.

Water damaged phone stuck in a boot loop? Don't give up just yet...

I thought I'd share my experience with this, as I've seen posts in the past relating to a water damaged phone boot looping and I don't think I've seen a proper solution given.
First thing's first, this advice is in relation to a very specific type of boot looping. Nothing to do with rooting, or software bugs. This is boot looping that has come about as a result of water damage. It may not have been long, maybe a couple of seconds in the toilet or some brief rain exposure. Whatever it is, you know your phone has been exposed to some water and it has begun boot looping. There will be no way to get out of it, as the phone boots for 2/3 seconds max before looping all over again. Even when you go into recovery, same thing, automatically boot loops.
Most people, including the official HTC Service Centre, will tell you the motherboard is fried and needs replacement. Whilst it is possible that may be true, it isn't guaranteed. It's an easy way out for HTC, as they can charge you an extortionate price for a new motherboard and not have to bother going through the work of taking the phone apart to find out what is wrong.
The solution may be much simpler - the Power Flex Cable. This is a very small cable that goes along the top of your phone. WHen water damaged, this cable can become damaged, causing a constant boot loop. The reason being it constantly tells the phone the power button is on, causing a constant on/off cycle. In this instance the motherboard is fine and you can get a replacement Flex Cable for less than £5!
There is an easy way to tell whether the Flex Cable is the likely cause of your looping. When the phone is looping, hold down the down volume button only. Don't touch the power button. If your phone still goes into recovery (then loops again) then it is entirely possible your Flex Cable is damaged, not your motherboard.
Next step, order a Flex Cable (they are easy to find). When it arrives, you will need to open your phone (there are guides on YouTube for this), detach the motherboard and replace the Flex Cable. An advance warning, this isn't easy and you have to be extremely careful. One bad move and your phone is history. The motherboard is delicate. If you look around the internet you will find guides which show how the HTC One X is configured. Note that the Flex Cable is behind the motherboard and quite awkward to get off. I would post a couple of links but as a new member I'm not allowed! PM me and I'm happy to share some helpful links though.
You'll know quickly if this has worked. When connecting your phone it will no longer loop. Let it charge for a little while, then power on and hope for the best. If the Flex Cable was the problem your phone will reboot, and you will be able to use it and get your data off.
Note that water damage can have long lasting effects on a mobile phone. Whilst this may solve the problem for a while, it's entirely possible your phone will fail at some point down the line. Prepare for that and make sure you back up accordingly. The above advice may give you a lifeline in getting data off your phone, though, and being able to use it for a little longer. I know that when I was looking around the net I only found this advice by chance, and I think it was on a non-phone related forum. This advice may exist on the forum somewhere but if so it isn't so easy to find. I hope somebody may come across this topic when trying to fix their water damaged phone and find it is the solution.
Good luck!

Same symptoms, but no water damage
Hey man,
Thanks a ton for your post. I have the same issue, as in it won't stop booting at all. However, mine didn't happen because of water damage, but when I tried to do a factory reset (the phone was only on 5% charge so I'm not sure if that screwed it up). Do you think it could still be solved with a flex cable? I tried holding just the volume button down, and it does go into the bootloader so it seems pretty much exactly like what you have described!
Cheers

My only experience with replacing the flex cable comes from water damage, I'm not sure whether a software fault (as this appears to be) could have any effect on the cable itself!
When you get into the bootloader screen, does it just cycle all the way through to fastboot without allowing you to select any other options before rebooting? If so it would suggest your phone thinks the power button is constantly pushed down, which is suggestive of a power flex cable fault.
These cables are very cheap to buy, so if you aren't able to do anything else with the phone it's definitely worth a shot, even if it doesn't work. Just remember that opening the phone voids your warranty, and be careful if you do attempt it, as the insides of the One X are quite delicate. It would be very easy to break something!

de4life said:
My only experience with replacing the flex cable comes from water damage, I'm not sure whether a software fault (as this appears to be) could have any effect on the cable itself!
When you get into the bootloader screen, does it just cycle all the way through to fastboot without allowing you to select any other options before rebooting? If so it would suggest your phone thinks the power button is constantly pushed down, which is suggestive of a power flex cable fault.
These cables are very cheap to buy, so if you aren't able to do anything else with the phone it's definitely worth a shot, even if it doesn't work. Just remember that opening the phone voids your warranty, and be careful if you do attempt it, as the insides of the One X are quite delicate. It would be very easy to break something!
Click to expand...
Click to collapse
I had to replace my power flex cable when I was changing my battery as I accidentally snapped it.

Kahun said:
I had to replace my power flex cable when I was changing my battery as I accidentally snapped it.
Click to expand...
Click to collapse
It's very easy to do, the flex cable is a fragile piece. There are quite a few parts inside the HOX which could easily snap, which is why I always urge a lot of caution when opening the phone up!

de4life said:
I thought I'd share my experience with this, as I've seen posts in the past relating to a water damaged phone boot looping and I don't think I've seen a proper solution given.
First thing's first, this advice is in relation to a very specific type of boot looping. Nothing to do with rooting, or software bugs. This is boot looping that has come about as a result of water damage. It may not have been long, maybe a couple of seconds in the toilet or some brief rain exposure. Whatever it is, you know your phone has been exposed to some water and it has begun boot looping. There will be no way to get out of it, as the phone boots for 2/3 seconds max before looping all over again. Even when you go into recovery, same thing, automatically boot loops.
Most people, including the official HTC Service Centre, will tell you the motherboard is fried and needs replacement. Whilst it is possible that may be true, it isn't guaranteed. It's an easy way out for HTC, as they can charge you an extortionate price for a new motherboard and not have to bother going through the work of taking the phone apart to find out what is wrong.
The solution may be much simpler - the Power Flex Cable. This is a very small cable that goes along the top of your phone. WHen water damaged, this cable can become damaged, causing a constant boot loop. The reason being it constantly tells the phone the power button is on, causing a constant on/off cycle. In this instance the motherboard is fine and you can get a replacement Flex Cable for less than £5!
There is an easy way to tell whether the Flex Cable is the likely cause of your looping. When the phone is looping, hold down the down volume button only. Don't touch the power button. If your phone still goes into recovery (then loops again) then it is entirely possible your Flex Cable is damaged, not your motherboard.
Next step, order a Flex Cable (they are easy to find). When it arrives, you will need to open your phone (there are guides on YouTube for this), detach the motherboard and replace the Flex Cable. An advance warning, this isn't easy and you have to be extremely careful. One bad move and your phone is history. The motherboard is delicate. If you look around the internet you will find guides which show how the HTC One X is configured. Note that the Flex Cable is behind the motherboard and quite awkward to get off. I would post a couple of links but as a new member I'm not allowed! PM me and I'm happy to share some helpful links though.
You'll know quickly if this has worked. When connecting your phone it will no longer loop. Let it charge for a little while, then power on and hope for the best. If the Flex Cable was the problem your phone will reboot, and you will be able to use it and get your data off.
Note that water damage can have long lasting effects on a mobile phone. Whilst this may solve the problem for a while, it's entirely possible your phone will fail at some point down the line. Prepare for that and make sure you back up accordingly. The above advice may give you a lifeline in getting data off your phone, though, and being able to use it for a little longer. I know that when I was looking around the net I only found this advice by chance, and I think it was on a non-phone related forum. This advice may exist on the forum somewhere but if so it isn't so easy to find. I hope somebody may come across this topic when trying to fix their water damaged phone and find it is the solution.
Good luck!
Click to expand...
Click to collapse
Thanks. I've already taken the back off and noticed some broken bits of plastic...from the back....but I did notice a bit of ribbon that looked a bit screwed up....I'm gonna take it to the gizmo wizard to fix once I buy a new power flex cable.

Good luck!

Another thing to try
de4life said:
Good luck!
Click to expand...
Click to collapse
Old thread I know but thought it was worth adding that with a water damaged phone the issues can result from the fact that tap water contains minerals which can leave a conductive residue when it dries - can change resistances, cause shorts etc. What I've done previously is used isopropyl alcohol (tape head cleaning fluid) with a toothbrush on the motherboard. Brought a phone back to life. This removes the mineral deposits and cleans everything. Had to remove the metal covers from the mobo first though. If a phone is basically dead or not working right after water damage then it's worth a go. As de4life says, just need to be super careful on the HOX with all the delicate ribbon cables.

Indeed, the phone should be thoroughly clensed if possible to wipe out any corrosive liquids left behind from the water (especially if it's dropped in an ocean). The effects of corrosion can be very slow and potentially last for months.

M8 please reply to this all the flex cables that I found are 40$+ can you give me a link for one as you stated that would cost 5 pounds

It worked
It worked! I replaced the power flex cable with a spare one on my HTC One X, previously damaged by being sucked by my one year old son - water damage.! It worked!

Many thanks to you man!

IamNewBee said:
Many thanks to you man!
Click to expand...
Click to collapse
Wondering if this is the right cable?
http://www.ebay.com/itm/New-Power-O...972183?hash=item27d4be6597:g:n6AAAOSw9GhYbb-y
Thanks!

Thank you!
de4life said:
I thought I'd share my experience with this, as I've seen posts in the past relating to a water damaged phone boot looping and I don't think I've seen a proper solution given.
First thing's first, this advice is in relation to a very specific type of boot looping. Nothing to do with rooting, or software bugs. This is boot looping that has come about as a result of water damage. It may not have been long, maybe a couple of seconds in the toilet or some brief rain exposure. Whatever it is, you know your phone has been exposed to some water and it has begun boot looping. There will be no way to get out of it, as the phone boots for 2/3 seconds max before looping all over again. Even when you go into recovery, same thing, automatically boot loops.
Most people, including the official HTC Service Centre, will tell you the motherboard is fried and needs replacement. Whilst it is possible that may be true, it isn't guaranteed. It's an easy way out for HTC, as they can charge you an extortionate price for a new motherboard and not have to bother going through the work of taking the phone apart to find out what is wrong.
The solution may be much simpler - the Power Flex Cable. This is a very small cable that goes along the top of your phone. WHen water damaged, this cable can become damaged, causing a constant boot loop. The reason being it constantly tells the phone the power button is on, causing a constant on/off cycle. In this instance the motherboard is fine and you can get a replacement Flex Cable for less than £5!
There is an easy way to tell whether the Flex Cable is the likely cause of your looping. When the phone is looping, hold down the down volume button only. Don't touch the power button. If your phone still goes into recovery (then loops again) then it is entirely possible your Flex Cable is damaged, not your motherboard.
Next step, order a Flex Cable (they are easy to find). When it arrives, you will need to open your phone (there are guides on YouTube for this), detach the motherboard and replace the Flex Cable. An advance warning, this isn't easy and you have to be extremely careful. One bad move and your phone is history. The motherboard is delicate. If you look around the internet you will find guides which show how the HTC One X is configured. Note that the Flex Cable is behind the motherboard and quite awkward to get off. I would post a couple of links but as a new member I'm not allowed! PM me and I'm happy to share some helpful links though.
You'll know quickly if this has worked. When connecting your phone it will no longer loop. Let it charge for a little while, then power on and hope for the best. If the Flex Cable was the problem your phone will reboot, and you will be able to use it and get your data off.
Note that water damage can have long lasting effects on a mobile phone. Whilst this may solve the problem for a while, it's entirely possible your phone will fail at some point down the line. Prepare for that and make sure you back up accordingly. The above advice may give you a lifeline in getting data off your phone, though, and being able to use it for a little longer. I know that when I was looking around the net I only found this advice by chance, and I think it was on a non-phone related forum. This advice may exist on the forum somewhere but if so it isn't so easy to find. I hope somebody may come across this topic when trying to fix their water damaged phone and find it is the solution.
Good luck!
Click to expand...
Click to collapse
Thank you very much for typing this out! My Google Pixel OG (2016), which was made by HTC, experienced the exact same problem. I have just fixed it by replacing the power flex cable like you suggested.

lazinase said:
Thank you very much for typing this out! My Google Pixel OG (2016), which was made by HTC, experienced the exact same problem. I have just fixed it by replacing the power flex cable like you suggested.
Click to expand...
Click to collapse
I was surprised to get a notification for this old thread! I'm glad this worked for you. I had no idea HTC used the same design for the original Pixel.

Black (not working) screen after drop.

Hello comunity
I bought one nexus 2013 wifi... (Second hand) and I am planning to mount it in my car...
well ... i just started preparing the software ...rooting, unlock bootloader and so on ...
then accidently I dropped it on the floor :/
After this the screen is black. It is OK - it is not brocken but is not working at all...
The computer recognizes the Nexus (I can see it from Device menagment in my computer).
Then I opened the Nexus..
Reconnected the battery... and trying to hold the power button for 60 sec...
again nothing worked and the screen is still dead.
Is it possible this to be a problem?
https://goo.gl/photos/k4EYBvWvQynab3v16
seem it is not OK... (There is a black line on the cable ... may be it is a missing part >)
If i buy one of this cables and change it may be the problem would be fixed??
Tnx and Happy new year

Voklav said:
Hello comunity
I bought one nexus 2013 wifi... (Second hand) and I am planning to mount it in my car...
well ... i just started preparing the software ...rooting, unlock bootloader and so on ...
then accidently I dropped it on the floor :/
After this the screen is black. It is OK - it is not brocken but is not working at all...
The computer recognizes the Nexus (I can see it from Device menagment in my computer).
Then I opened the Nexus..
Reconnected the battery... and trying to hold the power button for 60 sec...
again nothing worked and the screen is still dead.
Is it possible this to be a problem?
https://goo.gl/photos/k4EYBvWvQynab3v16
seem it is not OK... (There is a black line on the cable ... may be it is a missing part >)
If i buy one of this cables and change it may be the problem would be fixed??
Tnx and Happy new year
Click to expand...
Click to collapse
Yes, that part has been stripped. Can't tell if that causes the problem, but I'm almost certain it was not caused by the drop since that part was locked inside the connector, unless it had already fallen out when you opened the thing. Where you ripped it when removing, you might want to look inside the connector to make sure the loose bit doesn't remain in there as it could short. I take it you're not in the US. Otherwise, I could mail you an extra cable I have. Good luck with your repair.

Disconnecting the cable caused your issue for sure, be careful before you tinker with devices.

This cable is OK unless you damaged it during disassembly. The most likely failure is the screen. Have a look at it with a lamp at an angle to check for any cracks.
Did you earlier manage to install TWRP? If so boot to recovery and check with ADB file system access.

Well..
Tnx to all of you.
The tablet is working again.
The problem was this cable.
I ordered a new one.
I really couldnt undartand how just one drop can be the reason for damaging the cable.
Smiles

Touch not working after screen replacement

Hi guys
I wanted to ressurect my old moto g5 (cedric xt1676) which i was not using for a longer time. Screen was cracked but touch worked just fine. I bought screen replacement assembly and connected it. Screen (picture) is working fine but touch is not working at all. Is there any way to solve this problem? What i found untill now is that after some update motorola/lenovo disabled support for 3rd party screens - one i bought is stated to be "original" but i doubt it.
I did a factory reset before removing old screen, after connecting new one, start menu was in russian (i can't read bukvas so its a guess ), after another reset it is back to english but touch is still not working. There is a padlock symbol in top left corner of the screen.
I just wanted to fix the old phone to give it to the family member but now i spent so much time on this issue that i want to fix it very badly.
Hope that someone can and want to help me.

At the end of the day it's all down to if the correct parts were used and if it was fixed correctly. Nothing we can really help with here.

It's Russian ransomware screen
Seriously always use OEM parts.
Make sure all connectors are intact; remove and inspect contacts. Make sure you didn't miss a ground or data connection; sometimes they are just contact points between assemblies. Using the wrong length screw may cause a missing contact pathway. Assemble exactly the way it was.
The mobo may have been damaged when the display was broken. High G impacts can internally damage chipsets and crack solder joints. Flexing a multilayered mobo can break internal traces.

Sorry to hear that. Anyway - i have nothing to loose so i would try with olderversion of android - is it possible to instal without working touch in the phone?

Question Save data with broken display (black screen)

Hallo,
the display of my POCO F3 is broken, meaning black screen. The device itself starts normally. How can I save my data? USB debugging is disabled and I can't activate it because the broken display of course.
Could anyone help me to save my data?
Thanks in advance!

Your data is safe. However you may need to wait awhile to access it.
Your best bet is to get your screen replaced.
Call around to local cell phone repair buisnesses and see if they any replacement screens in stock for the poco f3. If you have a xiaomi repair center near, even better. If no one had one in stock, your best to order one yourself. (this is where you may have to wait a bit as it may have to be shipped from china) if you're comfortable replacing your screen yourself, do that. But having the broken device in hand, with its replacement screen, and taking those into any cell phone repair store, they should be able to fix you up pretty quickly and shouldnt be too much money since you did the leg work of retrieving the screen.
That's the route I would go, or at least get the ball rolling in a new display coming in the mail. Because trying to retrieve that data without usb debugging on, may be a bit of a rabit hole.

Hi,
To save your data, did you try this (with a PC of course)
https://github.com/Genymobile/scrcpy
Maybe you still have access to the phone despite the broken screen.
Let me know if it worked.

Not well read, "USB debugging is disabled", so it will not work....Sorry

Zinnz said:
Your data is safe. However you may need to wait awhile to access it.
Your best bet is to get your screen replaced.
Call around to local cell phone repair buisnesses and see if they any replacement screens in stock for the poco f3. If you have a xiaomi repair center near, even better. If no one had one in stock, your best to order one yourself. (this is where you may have to wait a bit as it may have to be shipped from china) if you're comfortable replacing your screen yourself, do that. But having the broken device in hand, with its replacement screen, and taking those into any cell phone repair store, they should be able to fix you up pretty quickly and shouldnt be too much money since you did the leg work of retrieving the screen.
That's the route I would go, or at least get the ball rolling in a new display coming in the mail. Because trying to retrieve that data without usb debugging on, may be a bit of a rabit hole.
Click to expand...
Click to collapse
Thanks for the suggestion, but honestly I don't think it's worth it. I have already received offers and they are from 190 € upwards. And I do not trust myself to exchange the display. In this case, wouldn't it make more sense to request a data backup from a company? I don't know how expensive that is though.
Isn't there any way to backup the date in recovery mode? I know that pressing the start and volume up button will get me into recovery mode. I've read somewhere that from there I can back up my data via the MI PC Suite, by pressing the down button twice. Is that correct? Regardless of that, I haven't yet managed to get into recovery mode with the broken display.

You can get a display and just connect it (don't remove the old display, just connect the new one).
It's silly that "ro.adb.secure" only means that it has to handshake and popup to allow ADB.
There really should be a mode where you say, "Only the 3 computers that I've already connected are acceptable and allow no further new ADB clients".
Then *everybody* could leave ADB on all the time.

Renate said:
You can get a display and just connect it (don't remove the old display, just connect the new one).
Click to expand...
Click to collapse
Could you explain to me, how to do this or provide a link to a tutorial for example?

You'd just open the back of your device. The screen hooks in with an orange flex cable. You just disconnect the old one and plug in the new one out the back, just flopping around. You won't have touch, but you can hook up a USB mouse.
I don't know your model. I can't get more specific.
It's just that a new screen by itself out of China can't be too expensive?
And if you like, after you get your data you can try to actually replace the screen yourself.

I have got access to my daughters P30, with broken display, over MHL display. The difficulty is just to find the right place on the display to allow MHL display.

Renate said:
You'd just open the back of your device. The screen hooks in with an orange flex cable. You just disconnect the old one and plug in the new one out the back, just flopping around. You won't have touch, but you can hook up a USB mouse.
I don't know your model. I can't get more specific.
It's just that a new screen by itself out of China can't be too expensive?
And if you like, after you get your data you can try to actually replace the screen yourself.
Click to expand...
Click to collapse
Thanks, perhaps I will try this!
By the way, it's a POCO F3 as mentioned above
Myhand said:
I have got access to my daughters P30, with broken display, over MHL display. The difficulty is just to find the right place on the display to allow MHL display.
Click to expand...
Click to collapse
But won't I need to enter my pin first to allow the MHL display?

If the touch is still working you may be able to enter your PIN.
Get a similar size device, go to the PIN screen, mark the position using clear wrap and a marker. Transfer the positions onto your screen.
Or use a scrap of plexiglas, mark it, then drill small holes and use that to mark your phone.

Or use an usb-keyboard.