Develop Bugs

[Q]Won't start - black display, diode

Hi,
I've left the phone last night on the USB cabel to charge up and this morning I wasn't able to turn it on.
Diode is blinking, but the phone won't start (display is still black) and won't even get to the recovery.
I've been running almost stock ROM with no CPU overclock or something else, phone has been stable for few weeks.
Any ideas or I have to face the fact, that my beloved "Z" has died?

Well it does start up, but the screen keeps black. Isn't it? It happend to me three times, first two times they said the display was replaced at the HTC service centre, the third time they switched the mainboard. I was lucky, I had warrenty.
But I also read a post somewhere it could be that the screen connector to the mainboard gets lose. If you don't have warrenty you could try to open the phone and see if thats the deal.
Sent from my HTC Desire Z using xda app-developers app

New Battery, Dead Phone

I bought an OEM battery for my Dinc2 from eBay. It didn't look like it was charging, but I left it in there for a few hours. The phone never turned on with the new battery. So I took it out and put the old battery back in (which had a 100% charge)...and now the phone goes to the htc white screen and then goes to black. When I try to turn it back on, nothing. I take the battery back out, and I can turn it on again, but again it only goes to the htc screen and then goes to black.
I can hold power + power down to get into the boot screen. Recovery goes to htc, then black. Factory reset goes to htc, then black.
Is it possible that a bum battery killed my phone?

sjwoo said:
I bought an OEM battery for my Dinc2 from eBay. It didn't look like it was charging, but I left it in there for a few hours. The phone never turned on with the new battery. So I took it out and put the old battery back in (which had a 100% charge)...and now the phone goes to the htc white screen and then goes to black. When I try to turn it back on, nothing. I take the battery back out, and I can turn it on again, but again it only goes to the htc screen and then goes to black.
I can hold power + power down to get into the boot screen. Recovery goes to htc, then black. Factory reset goes to htc, then black.
Is it possible that a bum battery killed my phone?
Click to expand...
Click to collapse
Sounds like your charging port is broken in my professional opinion. Even if the indicator shows the red light on the top, it does not mean the device is charging. The reason why it turns on and goes black in my opinion is, that it gave you a false charge on the battery when you charged it and won't turn on properly. You're able to go to the Boot menu because it hardly takes any battery life. I'm a cell phone technician, but that's just a guess from what you've told me. It could be a totally different reason. It's a very easy fix if that's the case. The charging port is on a flex cable and you can purchase it for about $5. As long as you know how to open the device properly, you'll be fine. If not seek a professional.

Rone922 said:
Sounds like your charging port is broken in my professional opinion. Even if the indicator shows the red light on the top, it does not mean the device is charging. The reason why it turns on and goes black in my opinion is, that it gave you a false charge on the battery when you charged it and won't turn on properly. You're able to go to the Boot menu because it hardly takes any battery life. I'm a cell phone technician, but that's just a guess from what you've told me. It could be a totally different reason. It's a very easy fix if that's the case. The charging port is on a flex cable and you can purchase it for about $5. As long as you know how to open the device properly, you'll be fine. If not seek a professional.
Click to expand...
Click to collapse
Thanks for your assessment. I guess what I don't understand is how the charging port could break with a discharged/faulty battery? When I first plugged the battery in, it made the orange light blink a few times, which I know is a signal that the battery is really low.

sjwoo said:
Thanks for your assessment. I guess what I don't understand is how the charging port could break with a discharged/faulty battery? When I first plugged the battery in, it made the orange light blink a few times, which I know is a signal that the battery is really low.
Click to expand...
Click to collapse
The charging port is really fragile, not much holding it down, especially since its on a flex. I'm not sure if this is against the forum rules or not, you can send it to me if you would like, and I'll be more than happy to fix it for you. Just pay shipping, part and labor. Part and labor $20 and you can use whatever shipping method you would like. Just give me labels to get here and back. You can take it to any repair center near you and they will probably charge you about $50-70. That would decrease the amount of time from the shipping, but it's totally up to you.

[Q] HTC One X violently died but I think I might've resurrected it?

Please look into this guys;
Last night, I charged my HOX from 18%-28%, used it for a few minutes and then turned it off (it was still at 28%). I then plugged it into the HTC "black box" usb charger (I've been using the same one since I got the phone like six months ago) but turned on charging after 2 hours - and left it charging for like 6½ hours.
EDIT: My brother actually switched on charging two hours after I switched the phone off. [IT WAS TURNED OFF FOR 2 HOURS]
In the morning, the red LED wasn't on, so I disconnected it and tried turning it on - it didn't work.
I tried holding all three buttons for minutes and all of that, but it still didn't work.
I googled the issue and went through a bunch of threads where the exact same thing happened, and most people said the battery either died permanently or something similar. This one person said he fixed his HOX by using a different charger, apparently the chargers themselves can die.
I plugged my HOX into my mom's Samsung charger, and booted it into bootloader, and selected RECOVERY. After a few minutes and to my orgasmic relief, my phone turned on.
I'm still confused as to what happened.
1) Is there something terribly wrong with my phone's battery now? (When it turned on it was at 1%, whereas I turned it off 6½ hours prior at 28%)
2) My HTC black box charger is obviously not to be used now, right?
3) Is there any problem with using a samsung charger on my HOX from now on? Or should I search for another HTC Black Box Charger?
I'll leave it on charge until it reaches around 60-70% and test it out, and let you know if it's fine. But until then, could you please try answering my questions?
THANKS!
On a side note:
I recently had my HOX repaired at the UK service center under warranty. The phone actually had a bunch of issues; yellow spots on the screen, the ruined wifi antennae thing.. Well, they replaced the screen and display, and replaced the Wifi wiring. When I got it back, it turned out that they forgot to remove a plastic cover from the in-call speaker. Thus I cannot use the phone for phone calls outside of extremely quiet places, unless I use earphones with a mic. I let HTC know this, and they said, "Oh, no problem, just send it back to center"
I reside outside of the UK. I had to send it there with my own money and bring it back with my own money. So now I have to choose between spending another $90 or being able to use my phone for phone calls.
Thanks again, whoever bothers to read this and helps me

Phone shut off, won't turn back on no matter what, blank display/GreenBlue LEDs HELP

Hello all. I recently made this thread where I described the phone, the LG G3 d851 t-mobile variant. randomly rebooting and not turning on without pulling the battery. (http://forum.xda-developers.com/lg-g3/help/d851-randomly-shuts-off-wont-power-t3424458). I deduced it to the replacement battery (supposedly genuine) that I purchased from a seller on ebay. I put my old battery in and everything is fine again, and the seller shipped me another replacement battery (big mistake, i know).
I put in the replacement battery, and a day later the phone shuts down again in the same manner as stated in the previous thread. I pull out the battery and put it back in and.. nothing happens on screen. The LEDS just flash green and blue. I tried plugging it into a charger, just a red LED, no display. If I plug in the phone to a charger without the battery inserted, the backlight activates but nothing whatsoever appears on the screen. I cannot get into the recovery either.
If I let the phone sit for a while, and try to power it on, I see the LG boot screen appear for about 5 seconds. Then the image flickers and fades away to black, and the LED just flashes blue/green.
Am I screwed or is there any way to salvage this phone? I'm desperate for any assistance and I'm totally open to any component level repair you guys recommend (I'm pretty broke :/)
Thanks all!
Current behavior:
Attempt to turn phone on: Blank display, no backlight, blue/green LEDs
Plug phone in with battery in: Blank display, no backlight, red LED
Plug phone without battery in: Blank display, backlight active, red LED
Do any of the above after leaving phone off for a while with battery unplugged: display begins to display the expected image for 5 seconds, then the screen flickers and the image fades until the screen turns black.
I tried the old (working) battery, and no luck either.
[edit] Hopefully solved. please read my latest post for my idiotic but somehow functional solution

amaskedman said:
Hello all. I recently made this thread where I described the phone randomly rebooting and not turning on without pulling the battery. (http://forum.xda-developers.com/lg-g3/help/d851-randomly-shuts-off-wont-power-t3424458). I deduced it to the replacement battery (supposedly genuine) that I purchased from a seller on ebay. I put my old battery in and everything is fine again, and the seller shipped me another replacement battery (big mistake, i know).
I put in the replacement battery, and a day later the phone shuts down again in the same manner as stated in the previous thread. I pull out the battery and put it back in and.. nothing happens on screen. The LEDS just flash green and blue. I tried plugging it into a charger, just a red LED, no display. If I plug in the phone to a charger without the battery inserted, the backlight activates but nothing whatsoever appears on the screen.
I tried the old (working) battery, and no luck either.
If I let the phone sit for a while, and try to power it on, I see the LG boot screen appear for about 5 seconds. Then the image flickers and fades away to black, and the LED just flashes blue/green.
Am I screwed or is there any way to salvage this phone? I'm desperate for any assistance and I'm totally open to any component level repair you guys recommend (I'm pretty broke :/)
Thanks all!
Click to expand...
Click to collapse
It would help if you would say what variant you have (at&t, verizon, sprint). Can you boot into TWRP? If your able to get into bootloader kdz or tot back to stock.

netookska05 said:
It would help if you would say what variant you have (at&t, verizon, sprint). Can you boot into TWRP? If your able to get into bootloader kdz or tot back to stock.
Click to expand...
Click to collapse
Sorry! I am using the d851 T-mobile model. I can't boot into recovery or anything. the LED just flashes some color but nothing appears on the screen.
Behavior:
Attempt to turn phone on: Blank display, no backlight, blue/green LEDs
Plug phone in with battery in: Blank display, no backlight, red LED
Plug phone without battery in: Blank display, backlight active, red LED
Do any of the above after leaving phone off for a while with battery unplugged: display begins to display the expected image for 5 seconds, then the screen flickers and the image fades until the screen turns black.
Will update the OP
Thank you for the reply.

amaskedman said:
Sorry! I am using the d851 T-mobile model. I can't boot into recovery or anything. the LED just flashes some color but nothing appears on the screen.
Behavior:
Attempt to turn phone on: Blank display, no backlight, blue/green LEDs
Plug phone in with battery in: Blank display, no backlight, red LED
Plug phone without battery in: Blank display, backlight active, red LED
Do any of the above after leaving phone off for a while with battery unplugged: display begins to display the expected image for 5 seconds, then the screen flickers and the image fades until the screen turns black.
Will update the OP
Thank you for the reply.
Click to expand...
Click to collapse
Possibly bricked plug it into your computer and see what it comes up as.

So strangely enough, I tried heating my phone using the most idiotic method possible by letting it heat in my blanket (I don't have immediate access to a heat gun). The screen began displaying some funky artifacts when attempting to boot with the LG logo but would otherwise revert to the behavior described in the OP (only LED working, no LCD display.).
I let the phone cool for a few hours and I'm actually able to get as far as the dialog box where it asks you whether or not you really want to format, in other words the factory data reset dialog box (when holding vol down + power to get into the recovery) with minimal to no hardware artififacts., and only when I confirm that I do does it crap out and revert to the previously described behavior. But it actually lets me use the vol keys to select an option, so I'm getting a lot further than before.
So this absolutely seems to be a hardware problem. Anywhere you guys suggest I examine before I take a heat gun to the motherboard? Any specific component I should look at?
Thank you guys so much

Take it to certified technician he will fix ur device these phones are dirt cheap nowadays so u will not be charged heavily no more than 50$ worthl

So,
after reading into this more and suspecting loose solder joints (see the various threads about screen flickering problem), I decided to pursue this route and continue trying to heat the logic board.
I'm completely broke and don't have access to a heat gun, and with no other working phone I decided to take some desperate measures. For those of you having a similar problem and reading this, PLEASE DON'T ATTEMPT WHAT I'M ABOUT TO DESCRIBE. THIS IS A HORRIBLE IDEA.
I turned on the phone to get the blue/green LEDs , plugged it into the wall, and wrapped the phone with blankets. I let the phone cook itself for 2 hours.
Yes, just like the infamous xbox 360 "towel trick".
When I went to remove the phone from my makeshift blanket oven, the phone was brutally hot and felt like a stovetop (was painful to touch for the first 30 seconds). The screen was filled with artifacts due to the intense heat.
I carefully removed the battery, let the heat dissipate slowly for a couple minutes, let the phone cool on an AC unit for a another few minutes and turned the phone on.
It worked. Phone boots and haven't had a single problem for over a day.
I guess the problem was cold solder joints after all, and the intense heat was enough to reflow the solder and form a stable enough connection to allow the display to function again.
Even ran a stress test program for an hour with no issues.
Hoping this fix lasts (knock on wood), will report back if I have any issues.
Again, anyone having a similar problem, please don't emulate me. I shouldn't even have to say why this is a bad idea. Get a heat gun, remove the motherboard and heat it that way.
I'm sure applying the proper repair procedure described in this thread http://forum.xda-developers.com/lg-g3/help/screen-flickering-fix-successful-t3397411 would have fixed my problem as well.
So, why did this problem happen in the first place? I'm guessing it has to do with the overheating issues this model of phone has (at least my particular unit). I've been playing a lot of pokemon go, so the phone is running a lot hotter than it used to. The constant high temps (reading upwards of 75c frequently from my cpu) were enough to weaken the solder joints. I also recall dropping the phone a couple times while playing the game, and I guess this was enough to knock the joints out of wack.
I'm currently capping the CPU at 1500mhz and the GPU at 300mhz and the phone is running a lot cooler now. I'm probably going to set the resolution to 1080p, cap the framerate and possibly undervolt, though this might not be necessary.
Thanks for reading and hope this helps someone in the future.

red light and dead

My phone have a red light when I try turn on. I cant put it in recovery moderno, cant turn on.. nothing... any solution?

That probably means the battery is too discharged to start up the main processor. Leave it charging overnight.

If it eventually has the red light go away but the screen does not come on, check with LG to see if they will repair it under warranty. I've got one currently there with them with a similar issue and is being repaired (or replaced. not sure yet) free of charge. I didn't even buy it, but found it in a dumpster. No proof of purchase needed.

My first one did the same, I sent it back to Amazon, got a full refund and bought a new one.

Hey, Any news about your problem ?
My friend give me his old phone and he has the same behaviour, he blinked red (or orange) for 10 sec and now there is nothing. He doesn't turn on, but on the top i can feel a little heat between the fingerprint and the camera. So there is some power in. On iFixit it seems that at this position, there is the Qualcomm power IC.
He bought the phone more than 2 years so now I think they will be no warranty so what should I do, contact LG to try ?
cheers