Develop Bugs

Can't allign my screen.

Hey guys!
I'm experiencing a very strange and annoying issue with my BA, and I was wondering if I could get some input from you.
So, here goes:
The touchscreen (not LCD) in my unit was broken, and thus I decided to fix it. I purchased a new one off eBay a few weeks ago, and just yesteday I proceeded to install it. To my surprise, something seems to have gone wrong.
I power up the unit, make my way into "Allign screen", and then the last "cross" that I have to touch rarely clicks in. On the other hand, when it does get detected, it simply restarts the alligning process.
What I've tried so far:
- allign right after installation -> no luck
- hard reset (on WM2k5_v4_R2.1) -> no luck again
- opened up the unit again, repositioned the screen -> nothing
- upgraded to Logout_WM2K5_5.4.03_HN -> still nothing
Right now I'm out of ideas, and I was hoping somebody here has some. Do you think the new touchscreen might be flawed ? I'm already discussing this issue with the seller.
Thanks for reading

New touchscreen or a refurb? Same type? (toppolly / sony) Sounds like it's been stripped from an old unit to me as it's not recognising the taps in the right places - can you see somehting like a liquid spill anywhere on the panel? This is what it looks like when the overlay touches the glass.
Richard

http://cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem&item=9720199180&rd=1&sspagename=STRK:MEWN:IT&rd=1
That was in fact my auction. Looked like brand spanking new to me, not one single stylus mark, and also had the protective sheet on. Of course, I might be wrong
Also, no liquid spill visible anywhere.

NSD said:
http://cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem&item=9720199180&rd=1&sspagename=STRK%3AMEWN%3AIT&rd=1
That was in fact my auction. Looked like brand spanking new to me, not one single stylus mark, and also had the protective sheet on. Of course, I might be wrong
Also, no liquid spill visible anywhere.
Click to expand...
Click to collapse
I bought from him also and am yet to fit - I got the completley wrong module :-(
Richard

What do you mean wrong module ? The "tip" of the flex cable ? Mine seems to match with what was already there ...

Hey NSD!
I purchased the exact same module for my Himalaya device, after the touchscreen being cracked.
My father, who is an electronic engineer, soldered the flat wire from the touchscreen onto the rear side of the LCD with normal copper wires. Unfortunately I have the exact same problem a you!
After attaching the entire LCD (+touchscreen) onto the mainboard, and supplying power from the battery, I'm not able to go past the Align Screen section!!!
The touchscreen is from the manufacture 'Asian Media' (I think so...).
It can't be a coincidence, that both of our touchscreens don't respond to tapping!!!
Anybody been able to get this problem fixed??
Any help would be appreciated!!!
Kind Regards,
Tony Schattat

I never replaced the touchscreen of my BA but I have replaced the screen of my ex ipaq 6315 once.
And one thing that I know is that sometimes the screen align process is different from the normal, I mean, it keeps repeating and repeating again many times....until the unit finally passes the align step and finishes the configuration. Actually I´ve "aligned" the screen more than 30 x (when I replaced the screen).
It happened just once and then I had a completely normal unit.

[Q] What's broken in this situation?

Recently, I took time to replace the screen on my s3. (Just the Screen not the digitizer). After I attached the newer screen, I turned the phone on, theres sound, vibration, etc. But the display is not shown at all. Is it the digitizer that broke? Is it something else that broke?
P.S While I was removing the cracked screen, i accidentally turned on the phone when i was using the s3 phone kit (which was pretty useless imo). Could this have played a role?
Any help is appreciated.

Since the digitizer and lcd are separate parts, a broken digitizer should not cause a blank screen. I have replaced the digitizer on a couple of Samsung phones and the lcd always displayed an image but would not respond to any touches.
Is it possible the lcd is defective?

audit13 said:
Since the digitizer and lcd are separate parts, a broken digitizer should not cause a blank screen. I have replaced the digitizer on a couple of Samsung phones and the lcd always displayed an image but would not respond to any touches.
Is it possible the lcd is defective?
Click to expand...
Click to collapse
Sorry for the late response, I was just able to check the forums recently. The lcd was brand new. How would I be able to tell if it would be defective or not? I'll post pictures if necessary.

C0ax said:
Sorry for the late response, I was just able to check the forums recently. The lcd was brand new. How would I be able to tell if it would be defective or not? I'll post pictures if necessary.
Click to expand...
Click to collapse
If you can see an image on the screen, the LCD is not defective. If you can see an image but it doesn't respond to touches, the digitizer could be defective, the phone's motherboard is defective, there is a bad connection between the digitizer and motherboard, or all three.

audit13 said:
If you can see an image on the screen, the LCD is not defective. If you can see an image but it doesn't respond to touches, the digitizer could be defective, the phone's motherboard is defective, there is a bad connection between the digitizer and motherboard, or all three.
Click to expand...
Click to collapse
Does that mean, that I need to buy another screen and test it out? I can't really test out the other parts you were talking about because, the screen does not display any image at all.

Since you can't see an image, it could be the LCD. Is there a repair shop where you could askl them to test your LCD?

audit13 said:
Since you can't see an image, it could be the LCD. Is there a repair shop where you could askl them to test your LCD?
Click to expand...
Click to collapse
I think there is one nearby. Would I need to pay for it to be tested? I don't know if it's still worth getting my S3 fixed because my relative is going to give his note 3 to me since the S5 is supposed to be revealed soon.

I would double and triple check that all ribbon cables and connectors are 100% properly attached / connected before replacing anything else....

sewermike said:
I would double and triple check that all ribbon cables and connectors are 100% properly attached / connected before replacing anything else....
Click to expand...
Click to collapse
I only replaced the screen and didn't touch anything else. I used the tutorials on youtube for guidance, but sadly it didn't work the way i hoped.

Help Please: Screen lost gamma after USB/charging board replacement.

Hi Folks.
I searched the forum for related issues but only found one other user who never got a response. I recently took it upon myself to replace the usb/charging board and mic on my stock sph-l900 note II running 4.4.2. Prior to the repair the display was perfect. Anyhow i replaced the board and when I powered up the phone the display seems to have lost the ability to display black. The Note II launch screen looks brown, so brown i would call it woodgrain. I double checked all connections and messed with every every display setting, none of which solved the problem. The touchscreen still works, the phone runs everything beuatifully, but the display gamma is too high by at least .6 everywhere on the screen.
Is this a matter of dust between the digitizer and screen? IS this even a problem anyone is remotely aware of? I have a cheap replacement glass but that was not an endeavor I wanted to attempt. Any ideas what to attempt short of replacing the screen? Any ideas at all?

Screen Problem

A friend of mine has a problem with his screen, see pics, it very strange and its somehow related to the SoM not the screen - I ve swapped the SoM for the one in my unit and the problem is cured on his unit but mine has it, I swapped them back and mine is fine but his has this problem.
It was on 5.1.1. and I ve tried several versions of 5.1.1. and several versions of 4.4.4. but I always get the same problem.
Any suggestions ?

Have I found the cause I wonder ? In the attached pic you can see a splodge of solder on what I m going to guess is the video output controller or something.

typos1 said:
Have I found the cause I wonder ? In the attached pic you can see a splodge of solder on what I m going to guess is the video output controller or something.
Click to expand...
Click to collapse
Who would carelessly drip solder into the unit? if it were to drip somewhere vital it would have fried or fry your car wires, even worse catch on fire.

alukarulz said:
Who would carelessly drip solder into the unit? if it were to drip somewhere vital it would have fried or fry your car wires, even worse catch on fire.
Click to expand...
Click to collapse
Theres no solder anywhere else and I dont think it dripped past the lid and the DVD player leaving no trace, I think someone was working on it for some reason or maybe bad quality control at the factory.

Did removing the solder splash resolve the issue?

marchnz said:
Did removing the solder splash resolve the issue?
Click to expand...
Click to collapse
Not done it yet, gonna try later . . .

I am interested too I've got the exact same problem. Pumpkin send me a new screen even though I've got no warranty anymore and the problem disappeared. Sadly this new screen is without a flex cable for the touchscreen so commands were not possible.

Draiden said:
I am interested too I've got the exact same problem. Pumpkin send me a new screen even though I've got no warranty anymore and the problem disappeared. Sadly this new screen is without a flex cable for the touchscreen so commands were not possible.
Click to expand...
Click to collapse
Yes, but the problem on my friend's unit is not screen related.
Why cant you use the cable from your old screen ?

typos1 said:
Yes, but the problem on my friend's unit is not screen related.
Why cant you use the cable from your old screen ?
Click to expand...
Click to collapse
Okay but screen issues are exactly the same.
The new screen has only one flex cable it's working but touch commands are not recognised. And the old screen has two flex cables.
Edit: I don't know if the new screen suffers the same problem because I had it running for only one minute and the screen issues are randomly.

marchnz said:
Did removing the solder splash resolve the issue?
Click to expand...
Click to collapse
Yes, it did !!
Half an hour of holding a soldering iron to a piece of copper braid and rubbing them over the solder/components covered in solder sorted it !
I used an iron that isnt quite hot enough to melt the solder used on these devices and it melted the solder splash easily, suggesting it was household solder or solder left by someone after the unit left the factory.
Still it was an excruciating half an hour - I thought all that heat my damage the SoM and maybe possibly remove components.

Draiden said:
Okay but screen issues are exactly the same.
The new screen has only one flex cable it's working but touch commands are not recognised. And the old screen has two flex cables.
Edit: I don't know if the new screen suffers the same problem because I had it running for only one minute and the screen issues are randomly.
Click to expand...
Click to collapse
Your old screen assembly is the screen + touchpanel. That is why there are two flexcables. One for the screen, one for the touchpanel. Your new screen assembly is the screen only.
You would have to move the touchpanel from the old to the new screen. However, that could be very difficult when the touchpanel surface is fully glued to the screen surface. If you're lucky the touchpanel is only attached along the edges. Then you might be able to remove it and stick it to the new screen.
Easiest way is to contact Pumpkin and ask them to send you the full assembly, so screen + attached touchpanel.

Mau2012sim said:
Your old screen assembly is the screen + touchpanel. That is why there are two flexcables. One for the screen, one for the touchpanel. Your new screen assembly is the screen only.
You would have to move the touchpanel from the old to the new screen. However, that could be very difficult when the touchpanel surface is fully glued to the screen surface. If you're lucky the touchpanel is only attached along the edges. Then you might be able to remove it and stick it to the new screen.
Easiest way is to contact Pumpkin and ask them to send you the full assembly, so screen + attached touchpanel.
Click to expand...
Click to collapse
Pumpkin are just sellers, it may be better to contact the factory direct, mighty be cheaper too.

Yes thanks for your answers

PX30 Screen Issue white where black should be - HW or SW issue?

Picked up a used PX30 with a funny issue that I think might be HW related, but just want a second opinion before I do anything.
It is like it displays white where a shade of black should be, see attached picture, is this HW?
Model: ICE/HU/IN9053BL
Thanks for reading

unubtanium said:
Picked up a used PX30 with a funny issue that I think might be HW related, but just want a second opinion before I do anything.
It is like it displays white where a shade of black should be, see attached picture, is this HW?
Model: ICE/HU/IN9053BL
Thanks for reading
Click to expand...
Click to collapse
Is it an MTCD/E device?

marchnz said:
Is it an MTCD/E device?
Click to expand...
Click to collapse
It is a MTCE_LM_V3.42_1

I would venture that it's software. The reason I say this is that the colors on the ruler for the reverse camera are correct. I believe there are display adjustments that you could try in the factory settings. perhaps. Or it could be as simple as maybe in the accessibility settings that it's set for high contrast.
Maybe a factory reset might be something to try first?? Also are the colors jacked up when the system reboots like for the Android splash screen?

jlbooth said:
I would venture that it's software. The reason I say this is that the colors on the ruler for the reverse camera are correct. I believe there are display adjustments that you could try in the factory settings. perhaps. Or it could be as simple as maybe in the accessibility settings that it's set for high contrast.
Maybe a factory reset might be something to try first?? Also are the colors jacked up when the system reboots like for the Android splash screen?
Click to expand...
Click to collapse
The unit had been reset when I got it, but can not hurt by trying again.
The boot splash also has the issue on the animated logo, and it moves with the animation.
Before I do another reset, I will try to changing options in the factory settings, think it is the Display LCD type option i need to try changing, it is my first android head unit, but been android user for long time so will try flicking options and if all goes wrong a reset it is

It's wild that the ruler colors (red yellow and green) on the reversing screen were correct but nothing else is. Wow. If it's happening on the Android boot logo, that's kind of before Android has even loaded so maybe it's not necessarily software. I was kind of hoping maybe if logo was correct then something was getting flipped after boot up.
The color and display settings in the factory settings, I would think would be applicable regardless of whether Android has booted or not since those settings typically change settings in the MCU or main board.
Sorry for putting out more maybe's than answers. Hope you can get it sorted and report back what the solution is.

jlbooth said:
It's wild that the ruler colors (red yellow and green) on the reversing screen were correct but nothing else is. Wow. If it's happening on the Android boot logo, that's kind of before Android has even loaded so maybe it's not necessarily software. I was kind of hoping maybe if logo was correct then something was getting flipped after boot up.
The color and display settings in the factory settings, I would think would be applicable regardless of whether Android has booted or not since those settings typically change settings in the MCU or main board.
Sorry for putting out more maybe's than answers. Hope you can get it sorted and report back what the solution is.
Click to expand...
Click to collapse
Mate, nothing to be sorry about, very grateful that your reading and trying to help
I 100% agree with that it might be some setting that can change the MCU or MB, but still have a naging feeling it is HW, so after work today, I wil take the unit out and take it apart and see if i can "see" anything, maybe a loos connection or something.
I did look in the factory setting and it does not have the color settings, its android 9.. So maybe custom rom and if problem still there then take apart.. Hummm..

I will share with you that the TFT board used by Dasaita is one of the many weak points of these head units. That's the board that has ribbon cables between the main board and the display. I suppose it's not impossible that one of those ribbon cables could not be seated properly.
I got Dasaita to send me a replacement TFT board for one of the units that I installed in my truck. It got the display going again but unlike your issue the backlight wouldn't light up. I found the actual component on the TFT board that was smoked. There is a zener diode that is used to control the backlight voltage. It overheated as a result of having the screen brightness at 100%. Interesting that they set the brightness to 100% from the factory, imagine that...
Those ribbon cables are very cumbersome to get seated into their sockets and they didn't leave but very very little slack to work with.
I just find it odd that the colors for the ruler on the reversing screen are correct. The color settings I was referring to before should be found under the "other" category across the top in the factory settings. You might need to scroll down that list of settings to find them. Also the factory settings are not necessarily tied to the Android version. Those are tied to the MCU firmware version. If indeed your unit does not have these settings, it could be one of the differences between your PX30 and my PX6. It's possible these might be made available on your system using an alternate password instead of 126 to get into the settings, but I have no idea what that password could be.

jlbooth said:
I will share with you that the TFT board used by Dasaita is one of the many weak points of these head units. That's the board that has ribbon cables between the main board and the display. I suppose it's not impossible that one of those ribbon cables could not be seated properly.
I got Dasaita to send me a replacement TFT board for one of the units that I installed in my truck. It got the display going again but unlike your issue the backlight wouldn't light up. I found the actual component on the TFT board that was smoked. There is a zener diode that is used to control the backlight voltage. It overheated as a result of having the screen brightness at 100%. Interesting that they set the brightness to 100% from the factory, imagine that...
Those ribbon cables are very cumbersome to get seated into their sockets and they didn't leave but very very little slack to work with.
I just find it odd that the colors for the ruler on the reversing screen are correct. The color settings I was referring to before should be found under the "other" category across the top in the factory settings. You might need to scroll down that list of settings to find them. Also the factory settings are not necessarily tied to the Android version. Those are tied to the MCU firmware version. If indeed your unit does not have these settings, it could be one of the differences between your PX30 and my PX6. It's possible these might be made available on your system using an alternate password instead of 126 to get into the settings, but I have no idea what that password could be.
Click to expand...
Click to collapse
Hi Friend, were you able to solve your problem? I have the same problem with my PX-30 multimedia. I'm thinking about opening it and seeing if the cables are connected correctly. Did you need to change something? or can I change the factory settings in CAR?

unubtanium said:
Mate, nothing to be sorry about, very grateful that your reading and trying to help
I 100% agree with that it might be some setting that can change the MCU or MB, but still have a naging feeling it is HW, so after work today, I wil take the unit out and take it apart and see if i can "see" anything, maybe a loos connection or something.
I did look in the factory setting and it does not have the color settings, its android 9.. So maybe custom rom and if problem still there then take apart.. Hummm..
Click to expand...
Click to collapse
Friend, were you able to fix your problem?
Could you give some details of what was done?
I have the same problem here in my PX30 (6 months of use)

makamine said:
Friend, were you able to fix your problem?
Could you give some details of what was done?
I have the same problem here in my PX30 (6 months of use)
Click to expand...
Click to collapse
Hi mate, I have not been able to fix it. The only thing I "did" was to unlock the factory settings and looked around in there, but was unable to see anything that might help. Also I did take the unit a bit apart to check for loose cables but did not find any. My next step is to install a custom rom "just to see" if it is a software issue or not.
How did your problem come about? Did it just happen one day?
6 month of use? is that from new or second hand? Or was it just in the car you bought?

unubtanium said:
Hi mate, I have not been able to fix it. The only thing I "did" was to unlock the factory settings and looked around in there, but was unable to see anything that might help. Also I did take the unit a bit apart to check for loose cables but did not find any. My next step is to install a custom rom "just to see" if it is a software issue or not.
How did your problem come about? Did it just happen one day?
6 month of use? is that from new or second hand? Or was it just in the car you bought?
Click to expand...
Click to collapse
Thank you for the clarifications.
I bought new on aliexpress in March/2021 it worked fine until 3 weeks ago, suddenly for 2 days it was alternating the color "Normal x negative screen"..
Right from the start I suspected some HW problem, since in my neighborhood, there are many holes and the car shakes a lot.
Right now I'm talking to the seller requesting permission to disassemble the multimedia and see if there's anything loose.
I have a hunch that it might be something in FLAT or BGA since the car is in the sun and several times when I got into the car I saw that the screen was super hot (even off)
As soon as I move forward, I'll share it here with everyone.
*I'm sorry for my English.

makamine said:
Thank you for the clarifications.
I bought new on aliexpress in March/2021 it worked fine until 3 weeks ago, suddenly for 2 days it was alternating the color "Normal x negative screen"..
Right from the start I suspected some HW problem, since in my neighborhood, there are many holes and the car shakes a lot.
Right now I'm talking to the seller requesting permission to disassemble the multimedia and see if there's anything loose.
I have a hunch that it might be something in FLAT or BGA since the car is in the sun and several times when I got into the car I saw that the screen was super hot (even off)
As soon as I move forward, I'll share it here with everyone.
*I'm sorry for my English.
Click to expand...
Click to collapse
Thanks for the info and update mate, I hope you have luck with them giving you permission to open it and check.
I might do that with mine again as I did not take of the circuit boards, just took off cover and checked LCD cables.
Will also post updates if I do make a 2nd attempt and good luck with yours.
Your English is all all good mate, nothing to think about

makamine said:
Right now I'm talking to the seller requesting permission to disassemble the multimedia and see if there's anything loose.
Click to expand...
Click to collapse
If your unit is Dasaita, no need to ask them for permission. It is common practice for them to provide replacement parts for us customers to "fix" issues which most often requires opening the unit. The warranty on these units is for the most part worthless as it would cost more to ship the whole unit back to Dasaita than it's worth as they typically expect you to pay shipping cost both ways. Just saying.

The seller returned me and asked to do a firware update, I performed the procedure he instructed me to do, but it had no effect on the screen (I just noticed an improvement in the audio/equalization)
I'm waiting for the next steps, they asked some more day to evaluate with the manufacturer.

Hope that they can resolve the issue to your satisfaction. Please keep the community here updated.