Stay awake while plugged in - Epic 4G Q&A, Help & Troubleshooting

Does anyone know of a way to keep the option to keep the screen awake while the power is plugged in checked through power cycles? The option is under Settings/Applications/Development. The last time this stayed on was with Eclair. Ever since Froyo, it always unchecked after reboot.... Very annoying....

I wouldn't recommend it, our Super AMOLED screens behave a lot like 1st gen plasma tvs, they tend to get image burn in and ghosting if they sit on a single image too long.

Organic LEDs can get burnt in images? Pretty sure only LCD and Plasma can get ghosting images.

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[Q] Defect or just coincidence?

I am on my 3rd Fire in less then 60 days, the first two died from the same thing. Powered off but when I went to power it on the next morning the light would briefly turn green then turn off. The screen would not come on, and when I plugged the charger in the light would turn green then change to a bright orange then immediately dim to a pale orange. Like I said the first two did the same thing, they were both flashed with the latest gedeROM and OC to 1200Mhz, I have shied away from flashing the third one until I can find a common denominator , either that or my luck is just that poor. I have googled this issue for the last few days and haven't found anybody with the same issue. Any help would be awesome thanks.
sarsius said:
I am on my 3rd Fire in less then 60 days, the first two died from the same thing. Powered off but when I went to power it on the next morning the light would briefly turn green then turn off. The screen would not come on, and when I plugged the charger in the light would turn green then change to a bright orange then immediately dim to a pale orange. Like I said the first two did the same thing, they were both flashed with the latest gedeROM and OC to 1200Mhz, I have shied away from flashing the third one until I can find a common denominator , either that or my luck is just that poor. I have googled this issue for the last few days and haven't found anybody with the same issue. Any help would be awesome thanks.
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Click to collapse
Well it sounds like its not charged. When u plug it in, do you have enough time to hold the power down for the 20 seconds required to force it off. If you can do that then you could let it charge while its forced off. But it sounds to me it wont stay on long enough. This might require a factory cable, not sure though. This same thing happened to me, ad with me being stupid I made a charger that is more voltage than default charger and I fried my kindle. I suggest not to do what I did
powerpoint45 said:
Well it sounds like its not charged. When u plug it in, do you have enough time to hold the power down for the 20 seconds required to force it off. If you can do that then you could let it charge while its forced off. But it sounds to me it wont stay on long enough. This might require a factory cable, not sure though. This same thing happened to me, ad with me being stupid I made a charger that is more voltage than default charger and I fried my kindle. I suggest not to do what I did
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Click to collapse
Yes I attempted a reset but it wouldn't respond and I tried to let it charge, but after about an hour it got extremely hot and I didn't feel I could leave it plugged in safely. When I contacted amazon for support I did all this for the tech on the phone and when I plugged it in and told him about the light, he said something about the usb port had come off the board which I know is possible but to happen twice in 60 days with two different devices is just ridiculous. I'm not sure what I am doing wrong if anything both devices were fully charged when the errors occurred. I just don't want to have to get a fourth before the month is out, the only positive is the fast turn around from amazon.

Backlight glow charging

Stock, rooted, leaving he phone charging overnight.
Next morning (every morning) I notice the backlight is slightly glowing -- looks like the back light is on and the screen set to black. Not the LED alert signal, that's sometimes flashing sometimes not (depending on whether I have a message), but there's a soft glow. If you had any room light on you cannot see it.
This morning I used the on/off button to turn the screen on, then off -- glow vanished. So it's not always there, and not related to (just) having the USB cable plugged in (which it still was).
The phone does charge, it is not hot, there is nothing that I can see unusual in Better Battery Stats. Normal battery life (well, seems reasonable, better than my GS2, about 50% for my average day).
Can someone take a look after a normal charge in a completely dark room -- is your backlight on? Again -- LCD solid black, just a dark grey glow through it.
PS. I will check tonight -- I am not sure if it starts on or not, I only have noticed it now on several mornings in a row, and forget to look as it starts charging.
Weird. I never seen that happened to me. Mine is completely stock and rooted with Rogers.
Now I'm really confused. I was curious and woke up a few times to look.
First, on hooking it up - no glow.
Then only one of three times was there a glow, but it was there - same symptom, you bring up the screen with the power button, then put it back to sleep - gone.
I think it must be some app. It may relate to the calendar notifications, last night one went off in the middle of the night which is why I checked it.
I'll try to see if I can pin it down; it's more curiosity than anything else. The phone charges fine, and it's not bright enough to bother, and I suspect the backlight could run 24x7 and not burn out before I have 5 new phones. Just weird.

Issue with Display

maybe i never noticed this but does anyone else notice when you double tap to put the phone to sleep, the screen goes to black and white briefly before going black?
I ask because yesterday i plugged in a generic USB cable and the phones screen showed the big huge battery logo as empty even though the phone was at 65% charge. I had to reboot to clear that issue and ever since then i noticed the screen goes black and white when i double tap or tap power to make it goto sleep.
Im still under my 30 day return period so i dont know if this is something i just didnt notice before or if i should be concerned - thanks!
Maynard46 said:
maybe i never noticed this but does anyone else notice when you double tap to put the phone to sleep, the screen goes to black and white briefly before going black?
I ask because yesterday i plugged in a generic USB cable and the phones screen showed the big huge battery logo as empty even though the phone was at 65% charge. I had to reboot to clear that issue and ever since then i noticed the screen goes black and white when i double tap or tap power to make it goto sleep.
Im still under my 30 day return period so i dont know if this is something i just didnt notice before or if i should be concerned - thanks!
Click to expand...
Click to collapse
The screen going to black and white before turning off is actually just part of the animation. It looks pretty cool imo
Plugging in a generic cable won't charge the device at the regular rate, which might be the reason for the other icon you saw. The battery stats can be messed up at times. A few minutes charging/discharging and they are back to normal.
cmendonc2 said:
The screen going to black and white before turning off is actually just part of the animation. It looks pretty cool imo
Plugging in a generic cable won't charge the device at the regular rate, which might be the reason for the other icon you saw. The battery stats can be messed up at times. A few minutes charging/discharging and they are back to normal.
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Click to collapse
the screen is the only concern for me. Are you sure this black and white animation? It would confirm my insanity.....but seriously i dont know how i missed this before so i wish a few people could check on their phones just to make me feel more at ease.
Maynard46 said:
the screen is the only concern for me. Are you sure this black and white animation? It would confirm my insanity.....but seriously i dont know how i missed this before so i wish a few people could check on their phones just to make me feel more at ease.
Click to expand...
Click to collapse
This video should help you out
thank you very much. this is stupid i know, but it was really bothering me and now i know for sure. Thanks again!

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.
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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.

My phone died !!! My S7 Active just quit on me for no apparent reason, I can only make it go into ODIN MODE.

For no apparent reason my phone just froze, I restarted it and got a black screen, pressed volume down, power and home and it goes into ODIN MODE, the light blue screen, where it says DOWNLOADING, and nothing happens, if I press cancel in the previous screen it foes into "recovery booting..." and nothing then goes black, has it really died ???
What condition is the battery in?
blackhawk said:
What condition is the battery in?
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not good, it was lasting like half of a day under regular use, was charging twice a day most of the time, the phone was in 50% when it died, what I'm really angry about is the fact that I have taken care of this phone soo so much, no falls, good case, etc... but I guess it finally quit on me ?? Could there be a program to make it boot ? or wipe it or something ??
If the battery failed it likely won't have enough current to boot even with the charger.
Once an Li battery is degraded it is more likely to fail. A swollen battery is a failure.
Replace battery, make sure it's charging and go from there. While replacing the battery check for loose connectors. Give it a good look over.
Then see what you got. Bonus, replacing the battery gives you a hard reboot... if it boots.
blackhawk said:
If the battery failed it likely won't have enough current to boot even with the charger.
Once an Li battery is degraded it is more likely to fail. A swollen battery is a failure.
Replace battery, make sure it's charging and go from there. While replacing the battery check for loose connectors. Give it a good look over.
Then see what you got. Bonus, replacing the battery gives you a hard reboot... if it boots.
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Click to collapse
thnx but I think it's not the battery it was at 50% when it died, I opened up spotify and it froze, I waited and then nothing it was totally frozen, so I did a hard reboot by pressing the volume power home keys and then nothing, it won't star anymore, but it still goes into download mode, if it was a bettery problem it wouldnt even start into download mode, it hink
+.-
hudtwalcker said:
thnx but I think it's not the battery it was at 50% when it died, I opened up spotify and it froze, I waited and then nothing it was totally frozen, so I did a hard reboot by pressing the volume power home keys and then nothing, it won't star anymore, but it still goes into download mode, if it was a bettery problem it wouldnt even start into download mode, it hink
+.-
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Click to collapse
Download mode uses less power. It takes substantially more power to boot... lots of apks loading and system activity.
Try it with the charger connected after leaving it charge for 3 hours. Does the battery get warm while charging?
blackhawk said:
Download mode uses less power. It takes substantially more power to boot... lots of apks loading and system activity.
Try it with the charger connected after leaving it charge for 3 hours. Does the battery get warm while charging?
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Click to collapse
I will try that thnk you
blackhawk said:
Download mode uses less power. It takes substantially more power to boot... lots of apks loading and system activity.
Try it with the charger connected after leaving it charge for 3 hours. Does the battery get warm while charging?
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Click to collapse
Well yesterday it finally started booting up, but then shuts down, it takes reallly long for the Samsung s7 logo to come up, sometimes the att&t logo appears, sometimes it doesn't, then it "shuts down" but the blue light on the top left stays on always, today the light finally died (I'm guessing the battery finally died) so I started charging it and the changing animation appeared !!! but then after a while, gone and now I got a red light on the top corner that wont turn off, well I got myself a brand new Galaxy a52s 5g, I guess my hand was forced, but I would still like to recover this phone, do you still think it's the battery ?
hudtwalcker said:
Well yesterday it finally started booting up, but then shuts down, it takes reallly long for the Samsung s7 logo to come up, sometimes the att&t logo appears, sometimes it doesn't, then it "shuts down" but the blue light on the top left stays on always, today the light finally died (I'm guessing the battery finally died) so I started charging it and the changing animation appeared !!! but then after a while, gone and now I got a red light on the top corner that wont turn off, well I got myself a brand new Galaxy a52s 5g, I guess my hand was forced, but I would still like to recover this phone, do you still think it's the battery ?
Click to expand...
Click to collapse
I don't know. May be a hardware failure. Take it apart, examine for loose connectors, replace battery and go from there.
A reflash may fix it if that doesn't work. Parts are cheap for this phone now as are used ones. As long it's supported by your carrier as 4G VoLTE*. AT&T makes the switch this Feb 22, 2022.
I have a S4+ that's not in use, I always liked the S7+. However my next upgrade was the N10+ as I had always liked the Note series. I jumped 5 years... talk about future shock
The battery in the S4+ has a removable rear cover secured by a cam screw. It is a LCD display vs the S7+'s AMOLED display and harder to remove battery. The good news is since it's not an LCD you can use anhydrous isopropyl alcohol to aid safely in disassembly without worrying about poisoning the display.
*it is supported, see attachment below

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