Database Users

Let Andriod die now have a paper wheight

ok here is the problem.
4 nights ago i forgot to plug in my hd2 while android was running and the battery died.
the next morning i went to turn it on and the screen no longer turns on but the phone does boot. the battery doesnt charge, status light doesnt either, end key doesnt work, when i answer calls no noise can be heard or made.
any hope?

Im guessing you cant run bootloader?
Maybe this is a warrenty jobby

If you know someone with another HD2, Try swapping the battery.

chrisizzle492 said:
ok here is the problem.
4 nights ago i forgot to plug in my hd2 while android was running and the battery died.
the next morning i went to turn it on and the screen no longer turns on but the phone does boot. the battery doesnt charge, status light doesnt either, end key doesnt work, when i answer calls no noise can be heard or made.
any hope?
Click to expand...
Click to collapse
does it enter in bootloader mode?
retry flashing wm rom+radio

chrisizzle492 said:
i went to turn it on and the screen no longer turns on but the phone does boot. the battery doesnt charge, status light doesnt either, end key doesnt work, when i answer calls no noise can be heard or made.
Click to expand...
Click to collapse
Hi Chris,
Please eleborate/clarify your OP, because I don't think anyone gets this... At least i don't! You say the screen doesn't turn on but the phone boots?! How do you figure that? Your device is actually on because you can receive/answer calls!?! :S
Sounds like your device has just BSOD (Black Screen of Death) which is discussed quite a lot here. Just press reset button or pull the battery (please tell me you have tried that before...).
If your device IS NOT powered on, please try this:
Does the device vibrate shortly when pressing the End-button? If so you should leave it connected to the charger for longer. If battery has drained too much it takes a while for the device to allow it to power itself up (prevention of overdrainage, which Lithium-batteries don't like very much).
Do you charge through USB, or with the supplied charger? I've had this before trying to charge it with a (different brand) microUSB charger. Turned out most chargers only give out 500mAh, whilst my normal charger (and car-charger) give out 1000mAh i believe. That might help.
You can order a cheap replacement battery from China (i got mine with dockingstation), which is already charged about 60% (for storage purposes).
BTW if your problem is fixed, please add the prefix [FIXED] or [SOLVED] to your topics title.

shufflez said:
Hi Chris,
Please eleborate/clarify your OP, because I don't think anyone gets this... At least i don't! You say the screen doesn't turn on but the phone boots?! How do you figure that? Your device is actually on because you can receive/answer calls!?! :S
Sounds like your device has just BSOD (Black Screen of Death) which is discussed quite a lot here. Just press reset button or pull the battery (please tell me you have tried that before...).
If your device IS NOT powered on, please try this:
Does the device vibrate shortly when pressing the End-button? If so you should leave it connected to the charger for longer. If battery has drained too much it takes a while for the device to allow it to power itself up (prevention of overdrainage, which Lithium-batteries don't like very much).
Do you charge through USB, or with the supplied charger? I've had this before trying to charge it with a (different brand) microUSB charger. Turned out most chargers only give out 500mAh, whilst my normal charger (and car-charger) give out 1000mAh i believe. That might help.
You can order a cheap replacement battery from China (i got mine with dockingstation), which is already charged about 60% (for storage purposes).
BTW if your problem is fixed, please add the prefix [FIXED] or [SOLVED] to your topics title.
Click to expand...
Click to collapse
i have restarted many times.
i use the wall charger.
but why would the phone boot but not turn on the screen or have the mic work?

remove your sd card and the battery. you may have to hit the rest button on the back after you plug the battery back in as well, but as long as you have the sd card out it should come back on. try plugging the phone into a charger and then remove the battery as well sometimes it'll wake it up so to speak. it's just a matter of playing with it. mine did the exact same thing and i freaked out for a little bit.
now if after all this it doesn't work and you've played with it for a while then yeah, best of luck to you =\. but whatever you do in playing with the battery and the charger, keep the sd card out until you can boot into winmo.
EDIT: never mind, i thought the phone wasn't booting. i misunderstood, but i went back and reread the original post. try reflashing your rom if you're in winmo and experiencing those issues. or take the sd card out and reboot.

i would suggest making an backup, as your phone turns on you should be able to estaplish a remote-connection with some (3rd-party-)software and do a hardreset.
if this wont work i would recommend setting it back to factory default (revert hspl if you have one and install stock rom) and send it in for warranty.
seems to be some major problem...
All this steps should be possible without screen turning on (working touchscreen may be needed for backup, but flashing doent need screen input)
if drive-mode is default for your usb connection and holding you from flashing you can do a hardreset and afterwards active sync will be default again and you can establish an active sync connection and flash

check if any of the pins that contact the battery are bended or broken, try to avoid removing the battery when you have to reset your hd2 because the pins are fragile

similar thing happened to me just last night!
I tried the jmz dual boot last night and I was nearly out of battery. I didnt look at any instructions I just installed it and restarted the phone to check out the new toy. it finally got done loading I chose android right away and I was walking towards the bedroom. when I went to see if android had fully booted and plug in the phone I had nothing! It was off. I decided that the battery must have died so I tried to turn it on and all that happened was the tmobile flash screen came up for a second and then it went right off, I got so desperate that I was going to do a hard reset but that wouldnt even work! the boot loader screen would just shut right off. I was suggested to try another battery we had at the house and bang it fired right up I took a wiff of my other battery and I dont know what happened but I think I let the magic smoke out cuz it is fried!

chrisizzle492 said:
ok here is the problem.
4 nights ago i forgot to plug in my hd2 while android was running and the battery died.
the next morning i went to turn it on and the screen no longer turns on but the phone does boot. the battery doesnt charge, status light doesnt either, end key doesnt work, when i answer calls no noise can be heard or made.
any hope?
Click to expand...
Click to collapse
hello friend...i have a problem similar to this. basically when my phone is in android which i use alot if it dies in android, when i reboot it it will turn on for about a second to see my splash screen then turn itself off (the battery is obviously flat). so i plug my charger in and it stays on now but doesnt indicate charging....i boot it into windows mobile and the batt just stays at 0% but its still working. however once i unplug it it will die.....its like the battery is not in the phone. luckily i have two batteries and a dock which charges batteries, so i replaced the battery and everything works fine. once the battery that died in android was fully charged i tried it again and it was fine.................im guesing the moral to this story is dont let your phone die in android mode

I do notice my HD2 runs hotter while in android than while it runs in Windows.
I am not sure if that's an issue to this, which is why I never mentioned about it being hotter. Although my HD2 is noticeable hotter, it never gets to a point that I think I should unplug the USB due to overheating concern...
Just a few inputs from passed experience
I use TMOUS Stock 2.13.531.1 WWE ROM
2.12.50.2_2 radio (not stock)

k going to tmobile today to see if they have any extra batteries i can try.
then ill update

i went to tmobile. and while i was there i noticed the screen was turning on but very dim without backlight (barely noticable). but the rep helping me did not notice and i let it stay that way because tmobile is sending me a new refurbished phone as long as i send the old one (and the rep was totally cool he uses xda also and said they wont check my software and if they do they wont ask for the phone back). he also let me get insurance in case this happens again, instead i will just say its lost. so i basically killed 2 birds with one stone

my iconia wont charge :(

When i connect the charger to my iconia tab will glow a orange ligth but after a while it starts bliking a red(maybe pink) ligth :crying::crying::crying:
I tested my charger and it seems to work fine
Is it a hardware or a software issue?
P.S (sorry for my english):angel:

jimmis1996 said:
When i connect the charger to my iconia tab will glow a orange ligth but after a while it starts bliking a red(maybe pink) ligth :crying::crying::crying:
I tested my charger and it seems to work fine
Is it a hardware or a software issue?
P.S (sorry for my english):angel:
Click to expand...
Click to collapse
When you say you tested your charger, did you use a multi purpose voltmeter to make sure it puts out the correct voltage and amps?
Also, are you running a custom rom or factory stock?
If you have cwm installed you can wipe battery stats and see if it helps.
If not, and you are on ics you might try an ec flash through cwm.
Other than that, you probably have either a bad internal voltage regulator, unlikely, or a bad battery.
You can usually find battery replacements on the net. Just pop the back off and get the part number.
Or, you can send it to acer repair for warranty work.
MD

If you want to eliminate software or hardware from the equation just shutdown the tab and then connect the charger. If it charges then you know that the cause is in software. If it doesn't then it's the hardware at fault.

yaworski said:
If you want to eliminate software or hardware from the equation just shutdown the tab and then connect the charger. If it charges then you know that the cause is in software. If it doesn't then it's the hardware at fault.
Click to expand...
Click to collapse
Another good tip. Thanks my Polish friend.
MD

thanks for answer
yes i tested my charger and it doesnt have any problems
i am stock ics
my 1 year warrynty has ended
EDIT:I connect the charger and booted on android but after a while my tablet shutdown

jimmis1996 said:
yes i tested my charger and it doesnt have any problems
i am stock ics
my 1 year warrynty has ended
EDIT:I connect the charger and booted on android but after a while my tablet shutdown
Click to expand...
Click to collapse
Do not boot the tablet. Just shut it down fully, connect charger and leave it for some time. Just observe the power button LED. It should be red while charging.

yaworski said:
Do not boot the tablet. Just shut it down fully, connect charger and leave it for some time. Just observe the power button LED. It should be red while charging.
Click to expand...
Click to collapse
thanks for your advice i will try that while i wait for acer support to open in 2 days

yaworski said:
Do not boot the tablet. Just shut it down fully, connect charger and leave it for some time. Just observe the power button LED. It should be red while charging.
Click to expand...
Click to collapse
I have the same issue. Tried a million different ROMs and that didn't seem to solve the problem. The Orange/Red light comes on when the charger is plugged in but no matter how long I leave it on there the battery will say 12% when I get into Recovery.
---------- Post added at 03:07 PM ---------- Previous post was at 02:56 PM ----------
Also, it may be good to mention that I can't mount the sd in recovery either, if this isn't a power hardware issue it may be related to that? I got the tab to boot but only the navigation bar shows and the top left corner says android system. Won't move past that.

n311.dunkle said:
I have the same issue. Tried a million different ROMs and that didn't seem to solve the problem. The Orange/Red light comes on when the charger is plugged in but no matter how long I leave it on there the battery will say 12% when I get into Recovery.
---------- Post added at 03:07 PM ---------- Previous post was at 02:56 PM ----------
Also, it may be good to mention that I can't mount the sd in recovery either, if this isn't a power hardware issue it may be related to that? I got the tab to boot but only the navigation bar shows and the top left corner says android system. Won't move past that.
Click to expand...
Click to collapse
This is in fact a charger problem; was having it I'm pretty sure its caused by your charger supplying the wrong amperage or voltage mine was doing it after it had been shorting out by the plug in. I took it apart resoldered all the connections put new wire in it and it worked like brand new never had had it since i would say do the same if you have the experience or know how if you don't they go on eBay for pretty cheap just make sure you don't get a fake one
Good luck

[Q] Samsung Galaxy S4 SGH-I337 Hard Bricked? Help!

Hey everyone,
Problem:
Last night I was using my phone and it was on around 50% battery. I put it in my pocket and a few minutes later when i checked it, it appeared to be dead. It would not turn on when i tried to hold in the power button. I rooted my phone over a year ago and haven't updated it in a long time. It seems to have bricked out of the blue and it wont turn on.
Attempt to troubleshoot:
I tried removing the battery and putting it back in. When i do this the Samsung logo briefly appears with the normal unlocked screen. After about 2-3 seconds I notice a tiny glitch across the screen and then it goes black and there is nothing. I put my friends battery from his S4 in my phone and the same exact thing happens.
I also called AT&T and my warranty expired for this phone a few weeks ago. Does anyone have any suggestions on how to fix this?
Thanks,
-Alex

Does it do the same thing if you try to boot it into Odin mode? Meaning power plus the volume button.
Sent from my SGH-M919 using Tapatalk

Frankenscript said:
Does it do the same thing if you try to boot it into Odin mode? Meaning power plus the volume button.
Sent from my SGH-M919 using Tapatalk
Click to expand...
Click to collapse
Yeah I tried doing that as well. It only works for about a second. When I remove and reinsert the battery I have about a three second window before I get the black screen again. I removed the battery and right when I put it in I held the volume up, home, and then power keys. I see the screen start to change a split second before it goes back to black.

Does anyone know what could be causing this or what my options are? I am just over the one year warranty so i can not return the phone. I would like to troubleshoot it if possible, but I'm not quite sure where to start since I can't turn the phone on. I am leaving for vacation tomorrow night and I really need to have a phone. I have been trying to troubleshoot it since yesterday and I have had no luck.

Did you plug it in to AC and see if it runs--try that without battery also--

rugmankc said:
Did you plug it in to AC and see if it runs--try that without battery also--
Click to expand...
Click to collapse
I assume by AC you mean an alternating current (standard) outlet? I plugged it into the wall charger with and without the battery and it did not turn on.

musketman007 said:
I assume by AC you mean an alternating current (standard) outlet? I plugged it into the wall charger with and without the battery and it did not turn on.
Click to expand...
Click to collapse
Yeah, that's what I meant. May be hardware.

rugmankc said:
Yeah, that's what I meant. May be hardware.
Click to expand...
Click to collapse
Okay. Is there anywhere I can do to diagnose the hardware or I could take my phone to get it fixed and diagnosed? This is my first time having a phone stop working so I am not sure what to do since my warranty just expired last month.

One last thought before I suggest giving up. Is it possible the phone IS turning on (and staying on) but the screen is just not remaining on? Troubleshoot by turning on the phone until you briefly see the screen, then give it time to finish booting (if it really is on), then plug into PC to see if it is recognized by the computer? If so, then it's a screen issue.
Or, could it be the power button is wonky and is turning off the unit right after turn on?
I'm perplexed....
---------- Post added at 06:34 PM ---------- Previous post was at 06:33 PM ----------
musketman007 said:
Okay. Is there anywhere I can do to diagnose the hardware or I could take my phone to get it fixed and diagnosed? This is my first time having a phone stop working so I am not sure what to do since my warranty just expired last month.
Click to expand...
Click to collapse
If there is a CPR (Cell Phone Repair) near you, that would be my recommendation.

Frankenscript said:
One last thought before I suggest giving up. Is it possible the phone IS turning on (and staying on) but the screen is just not remaining on? Troubleshoot by turning on the phone until you briefly see the screen, then give it time to finish booting (if it really is on), then plug into PC to see if it is recognized by the computer? If so, then it's a screen issue.
Or, could it be the power button is wonky and is turning off the unit right after turn on?
I'm perplexed....
---------- Post added at 06:34 PM ---------- Previous post was at 06:33 PM ----------
If there is a CPR (Cell Phone Repair) near you, that would be my recommendation.
Click to expand...
Click to collapse
Neither my desktop nor my laptop can detect the phone. The only time the phone turns on is when i take out the battery and put it back in. It comes on for like 2-3 seconds with the samsung logo and then shuts off. I did that while it was connected to my computer and the computer didn't recognize it.
How could I determine if the issue is the power button before taking it to a CPR?

musketman007 said:
Neither my desktop nor my laptop can detect the phone. The only time the phone turns on is when i take out the battery and put it back in. It comes on for like 2-3 seconds with the samsung logo and then shuts off. I did that while it was connected to my computer and the computer didn't recognize it.
How could I determine if the issue is the power button before taking it to a CPR?
Click to expand...
Click to collapse
Not sure about access to button with back off or how to take apart. But, you could try to depress button and try to spray some electronic cleaner in it with the nozzle tube provided. Radio Shack has it if Best Buy doesn't. I doubt if that will work though. But, the spray comes in handy for me on occasion.

rugmankc said:
Not sure about access to button with back off or how to take apart. But, you could try to depress button and try to spray some electronic cleaner in it with the nozzle tube provided. Radio Shack has it if Best Buy doesn't. I doubt if that will work though. But, the spray comes in handy for me on occasion.
Click to expand...
Click to collapse
I took off the cover, and then removed the screws to take off the back of the phone. I held the power button from the inside of the phone and it still did not turn on. I used my friends battery that was at 80% charge to test it so it isn't the battery. I found this tutorial online for removing the power button which could solve the problem (assuming it is the power button) but i'm not sure if it is the power switch. Also the tutorial is for the S3 and not the S4. Not sure if I should attempt this or if there is anything else I should try.

I'd wait a bit and see if anyone that has actually replaced one chimes in. You could in meantime try the spray. Make sure it is electronics spray so it won't damage or gum up anything--like you said it may not even be the buttton--
good luck

At this point my thought is the button isn't the issue. The button itself seems to be working based on your description.
I'd say Cell Phone Repair or a similar place is your best shot. Good luck. Let us know how it works out!

Samsung Galaxy S7 Edge Not Turning On

Hi people.
So i'm having a problem with my S7 Edge and i don't think it is common. A few weeks back I was using my phone and it would suddenly turn off and the battery would be drained too. After this first incident with the problem it happened more often, and the phone would start doing boot loops to the point where the phone just froze and turned off. When these problems occured it will usually need to be a problem where I do a safe boot (Volume up, Home button and power key), and everything will be fine (or to charge it if the battery drained), but recently, the phone just didn't work at all, to the point I waited for the battery to drain (10 hours), and try charging it, nothing happens.
So firstly I was watching a video and checking my CPU/Battery tempretures to see if that was the problem (the tempretures at the time were around 31 degrees), and mid way through the video it bugged out through the audio in a high screech and turned itself off.
I tried turning it on again but no response to the screen, i tried safe booting it, or every alternative booting option, it did not work at all.
Here is all the diagnostics and repairs I did, but no luck:
- Tried turning it on
- Different boot options (Volume up/down, Home button & power key)
- Cleaning the port for moisture detection
- Replacing the battery for a new one (Genuine one)
- Doing all of the above, with it on charge
- Connecting to a PC, but no detection
One positive I found was that when i put the phone on a wireless station, it would change colour to show that the phone is charging. I have however took the wireless out of the phone as it was in the way of the battery, and safely in my draw.
Before this final fault happened, I did do a recovery to a previous Android version, just incase if it was a software fault, but it wasn't. The phone is not rooted and I had it since September of 2016.
Is there any alternative options to do? As i'm running out of ideas to do as every solution on the internet is to turn it on, which i can't whatsoever.
The warranty is voided also as there is a crack on the screen lens, and it's way too much to pay for a repair.
I need some explination of why this is happening, so I can go in the right direction and not to waste money if i was going to a repair service, or purchasing the parts for myself.
Any help would be highly appericiated.

Check your installed apps to see if there any viruses on your phone. All you said are signs that your phone might have a virus (check how to remove it here: https://www.unlockunit.com/blog/how-to-tell-if-your-phone-has-a-virus/
However, there is a chance that you do not have any viruses on your phone, but at least you have to isolate this possibility.
Did you recall installing any app prior to this behavior?

This may be the case, however i can't turn on the phone at all. I tried every possible reboot possible, download mode, bios mode, safe boot, reboot, but nothing happens unfortunately. Unless i can do it whilst it is turned off, i can do something. I have a PC if i can do anything else with it.
I don't think I have installed any weird apps on the phone.

sounds like a brick to me. Not a lot I can thing of you can do.
If you place the wireless card back in does it boot?
IT sounds like you've messed with the internals, so possible you damaged something?

I don't particularly think that I broke it from the inside as it was behaving the same before i opened it. And when i used the wireless charging, it will only indicate it was charging or getting detected on that charging pad and not on the phone regarding a red led, or the charging icon

Have you tried holding volume down + home + power for 15 seconds and try turning on the phone again?

As mentioned in the description, I have unfortunately

MOweenSalah said:
As mentioned in the description, I have unfortunately
Click to expand...
Click to collapse
Have you had any luck? Am in the same boat.

Galaxy s5 won’t boot up

Please can someone help me with a problem I’m having with my Samsung Galaxy s5.
I put my phone on charge before I went to bed and when I woke up it was still showing a red LED. I knew this was wrong because it should have had enough time to charge and turn green. I had not powered the phone off before putting it on charge and I plugged it into the same USB 3.0 charging lead I have been using for the past six months. I unplugged the phone and pressed the power button to light up the lock screen but it didn’t light up.
I’m thinking possibly something has either shorted or over heated and fried something either on the charging port assembly or one of the chips adjacent to the port while the charger was plugged in. It seems like only a trickle of power is getting through to the phone. When I plug a different USB 2 charging cable into the phone, without trying to power on, the charging icon appears but shows no charge at all in the battery.
I have also tried the spare battery I have but it’s still the same. I know the spare battery is 100% fully charged because I store it in a separate charging/storage box which shows a green LED when it is full. In fact the one which was in the phone at the time is also fully charged according to the charging box. Neither battery has got warm at all inside the phone. I’m confident both batteries are fully charged and totally fine and the problem isn’t with the batteries.
At this point I removed my sim card and also the MicroSD card. I needed the sim to use in my spare phone and I wanted to see if the sd card could be causing the issue but after again trying a normal reboot it made no difference.
I’ve tried several possible things I found on google but nothing has worked. Between each different thing I tried I had to remove the battery for 10 seconds and insert it again to get it out of the boot loop so I could try something else.
Initially when I tried booting into safe mode, then recovery mode and then download mode it brought up the screens for those but in each case after a few seconds the phone powered off and went into a boot loop so I couldn’t attempt any recovery options such as clearing cache etc. Now I cannot even get it to start any of those modes at all and all that happens is the phone does a little vibration, displays the Samsung logo and then just boot loops no matter what I try.
I have tried removing the battery and leaving the phone for a few hours then powering on again but it still just loops.
I have tried pressing and holding Vol-down when plugging it into my PC using a different USB 2 cable and windows acknowledged a phone was plugged in but said it couldn’t connect or recognise the phone and suggested the phone could have a fault.
I don't know if maybe my USB 3.0 lead has a fault that could have caused it or if there could have been some electricity spike while the phone was plugged in, or as I said a component has just fried.
I strongly suspect this is a hardware fault and not a software fault but as I’m not a phone engineer I have no idea about how to trace any possible hardware issues or what might have gone wrong. I would really appreciate any help or suggestions about what the problem might be as this has been a great phone for the last 2 years since I got it and I’d be sad to have to junk it and buy a new one.
Thank you.

I would not junk it yet......
You had mentioned that you go through a lot, just to get phone into Recovery ( " Initially when I tried booting into safe mode, then recovery mode and then download mode it brought up the screens for those but in each case after a few seconds the phone powered off and went into a boot loop so I couldn’t attempt any recovery options such as clearing cache etc. Now I cannot even get it to start any of those modes at all and all that happens is the phone does a little vibration, displays the Samsung logo and then just boot loops no matter what I try." )
OK, just my 2 cents here on this... Why not trying to goto Recovery by pressing and holding the Volume Down (vol-); Home button, and The Power button all at the same time. (yes, if you have a Recovery, and its works, you should be able to boot right into Recovery- >Now, (I would, cause I've been there..) I would also have a PC going with Odin open (Plus the Latest Stock Rom) ... If it works, you would flash the Stock ROM, to clean up anything, giving you all stock, but you can change that of course ...then go from there...
Second, if you can not still get to Recovery.... Have you tried a Stock USB Cable, only asking.... Obliviously something is a miss... with Power... IF phone is off, and you plug it to a power source ... then system has power, and these can power up with just the usb cable, without having the battery in..... Been there. Can add the simple fact, if using just a Micro SD cable, they can bend the Power Board. Believe me (Had to fix the Wife's S5 a few Frinkin' times....) That is why, I say using the Stock Cable, or even a USB 3.0 Cable (like the stock one) does help with power issues when the Micro has bent up the power board...
Will check back and see if this may have you to Recovery or fixed... sure hope this can help you out

Thanks for replying godofsalt.
At the time the phone was plugged in to my USB 3 lead which charges faster and all I can think is that perhaps there could be a fault with the lead or the higher ampage of using this lead caused a circuit to burn out.
I have around a dozen USB 2 leads and I've tried your idea with 3 different ones but none of them will fire up the phone at all with the battery taken out.
I am sure this is going to need some kind of replacement either of the charging port or the motherboard. I don't rate my chances of trying to do it myself and I don't think it will be economic to take it to a shop so I've found a better option by buying the same phone which is second hand but in good condition. That way I know I have all the additional accessories already for probably the same price any shop would charge to fix it.
In future I'll stick to using a decent USB 2 lead on the 1 amp charger I used to use before and hopefully this will not occur again.

G500F battery graphic/boot loop
Had the same problem a few days after installing a 9.0 Rom. My battery is brand new and all cables aren't too aged, so I thought this had to be a physical fault of some kind, but then I had the thought to flash an older bootloader and just like that my battery started taking a charge again and I could boot up. Switched to Flyme os for a while the went back to 9.0 again, with the lastest bootloader and the thing stopped working again. Don't know too much, but I'd try and flash a different bootloader to see if there's any difference. My device failed right at the Galaxy logo, then looped the charging graphic endlessly but would strangely go into download mode and not fail. Don't know if this helps, just thought I'd share my solution.

Thanks for replying henderia93.
My symptoms are very slightly different in that the phone couldn't maintain any of the modes I tried for more than a few seconds before going back to the boot loop again so there was no chance of trying any software fixes including flashing the ROM. Now it won't enter any of those modes at all. I'm certain that's due to only a trickle of power getting through to the main board, not enough to maintain any recovery modes, so there is just enough power for it to attempt to boot, but no more so it just keeps looping, most likely caused by something that has blown while on charge.

MarylinC said:
Thanks for replying henderia93.
My symptoms are very slightly different in that the phone couldn't maintain any of the modes I tried for more than a few seconds before going back to the boot loop again so there was no chance of trying any software fixes including flashing the ROM. Now it won't enter any of those modes at all. I'm certain that's due to only a trickle of power getting through to the main board, not enough to maintain any recovery modes, so there is just enough power for it to attempt to boot, but no more so it just keeps looping, most likely caused by something that has blown while on charge.
Click to expand...
Click to collapse
I ha e taken so many of these a part... Like I may have mentioned, there is a Board, just for the USB (data and power (i still have 2 of them)).... In short, you really have to pretty much take the phone a part. Being very careful with the Screen, and the "Sticky" LEDs and the Home button. There is a lot to it actually.
Like I said, been there done that... Cheap to get, takes some time but it is possible to replace that board. It's a separate board different from the actual main CPU board.
I would have to find it, but I had a manual, for taking these a part.

godofsalt said:
I ha e taken so many of these a part... Like I may have mentioned, there is a Board, just for the USB (data and power (i still have 2 of them)).... In short, you really have to pretty much take the phone a part. Being very careful with the Screen, and the "Sticky" LEDs and the Home button. There is a lot to it actually.
Like I said, been there done that... Cheap to get, takes some time but it is possible to replace that board. It's a separate board different from the actual main CPU board.
I would have to find it, but I had a manual, for taking these a part.
Click to expand...
Click to collapse
While I've been looking for answers about this I've seen teardown videos for the s5 so I can see what the port assembly looks like with it's little PCB behind it. As I have a replacement s5 on it's way all I need to decide now is whether to keep the old handset for spare parts or see if I can follow the teardown video to try and install a new port assembly to get the phone working again as a spare.

MarylinC said:
While I've been looking for answers about this I've seen teardown videos for the s5 so I can see what the port assembly looks like with it's little PCB behind it. As I have a replacement s5 on it's way all I need to decide now is whether to keep the old handset for spare parts or see if I can follow the teardown video to try and install a new port assembly to get the phone working again as a spare.
Click to expand...
Click to collapse
Yep, me too, seen many vids on the tear down. I decided to go a bit more, IMHO, to have an actual manual, PDF, when I did my first one, many years ago. So, can read, and use photos wisely. Seen too many Utube crap, where the break it, destroy it..... crazy!
Well, at this age, not too sure what to do my self. In our case, our present service is cheaper to Keep these. Grandfathered in, and we pay a but less, than going to any other carrier. Plus, these newer phones are not cheap at all.
True, it up to you. hope all goes well.

Sorry I am a novice so please excuse my question.
Are you assuming that the usb port is shorting even when no usb cable is inserted? As you put a fully charged battery in with no change it would seem that the act of charging is not involved.
Have you tried a voltmeter to check the voltage at the battery charging pins?
Have you tried to check the voltage at the two pins commonly used for a wireless charging adapter (to the upper left of the battery) to see what the voltage is?
Sorry if I am off base.