Database Develop

[Q] Bootlooping

Having a bit a problem. My phone is bootlooping while entering the OS but it's also bootlooping entering TWRP.
<phone details>
Unlocked
S-OFF
hboot 1.44
TWRP 2.6.3.3
I installed the latest nightly of CM11 and started to restore my applications. The phone got extremely hot during USB transfer and while TB was restoring. In the middle of the TB restore the phone rebooted and entered a bootloop. Attempting to enter recovery from the bootloader also results in a bootloop. It will get to the first 'TEAMWIN" splash screen then reboot.
I've tried reflashing recovery through fastboot but it still bootloops. I've erased cache through fastboot and then reflashed recovery and I'm still in the same boat.
I'm not exactly sure what my next steps would be. Any ideas?

What about flash recovery and then fastboot erase cache? Exact model of recovery?
sent from my mobile device

SaHiLzZ said:
What about flash recovery and then fastboot erase cache? Exact model of recovery?
sent from my mobile device
Click to expand...
Click to collapse
Already done... Recovery is "openrecovery-twrp-2.6.3.3-m7". One of the first things I tried.

Probably start from scratch. AS you are Soff, run a full ruu and see where it takes you
sent from my mobile device

Attempting to run the RUU....
It's hanging with the progression bar at about the halfway point. It's been sitting there for 33 minutes at this point.
The phone had been acting weird before. That was actually the impetus to switch from ARHD to CM11. I'm wondering if there isn't an underlying problem with the storage.
So at this point it looks like i'm screwed.
I'm not going to be able to file a warranty claim since I'm S-OFF and unlocked which I can't change since I can't get into anything but fastboot.

menos08642 said:
Attempting to run the RUU....
It's hanging with the progression bar at about the halfway point. It's been sitting there for 33 minutes at this point.
The phone had been acting weird before. That was actually the impetus to switch from ARHD to CM11. I'm wondering if there isn't an underlying problem with the storage.
So at this point it looks like i'm screwed.
I'm not going to be able to file a warranty claim since I'm S-OFF and unlocked which I can't change since I can't get into anything but fastboot.
Click to expand...
Click to collapse
Just reboot the phone and try again... RUU hang sometimes, should work fine on second try

I came back in the room and the screen was black. It will not power on or do anything.
In device manager on my computer it is showing QHSUSB_DLOAD...
So I'm guessing it's bricked?

menos08642 said:
I came back in the room and the screen was black. It will not power on or do anything.
In device manager on my computer it is showing QHSUSB_DLOAD...
So I'm guessing it's bricked?
Click to expand...
Click to collapse
QHSUSB_DLOAD -> hard brick, nothing you can do about it, and not your fault. off to repair for motherboard replacement, sorry mate.

That's a good thing maybe as now you can send it in for warranty!
sent from my mobile device

[Q] Stuck in a reboot loop, can't get into recovery, what to do?

I recently upgraded to an HTC One, on Verizon in the US. I promptly used rumrunner s-off to get S-OFF, unlock the bootloader, and obtain root. I also flashed the latest ClockworkMod recovery, with the intent of installing CyanogenMod, but decided I'd try out the stock ROM for a few days first, since my old phone was still on Gingerbread.
Everything was working fine until I decided to remove some Verizon bloatware. While I did back up each app before removing it, I forgot to make a nandroid backup. I only removed things that seemed nonessential -- such as the NFL Mobile app, Slacker radio, and My Verizon, which I'd also removed without issue on my old phone -- but apparently that was not the case, as after rebooting, I got stuck on the Verizon logo during the boot sequence.
I then attempted to perform a factory reset in CWMR, and it appeared to be stuck on "wiping cache", so -- like the impatient idiot I clearly am, as I later found a few threads explaining that this part of the reset process can just take a very long time -- I rebooted the phone to try again. This resulted in CWMR throwing errors about failing to mount several partitions, but it finally seemed to finish the reset on the second try. However, upon reboot, it just sat at the HTC logo forever.
After about an hour, and no success in finding anything on the internet indicating that it should take this long to boot up after a reset, I powered the phone off and back on again. After rebooting, the bootloader screen displayed "OS" in red followed by some random symbols. I could still get into recovery, and could still access the device with fastboot, so I decided to try to reflash the stock ROM, using the RUU zip found here.
Due to some problem (this was all about 6 hours ago while I was at work, and I was quite frustrated at this point, so I don't remember what exactly was the problem here) and based on the advice of another forum thread, I decided to try TWRP instead of CWM. But, TWRP wouldn't go any further than its logo splash screen, so I re-flashed CWM. Afterwards, my phone went into a reboot loop -- the HTC logo comes up, the phone vibrates shortly, and then after a few seconds the screen turns off and it does the same thing over again. If I hold the power button down for long enough, it will power down, but if I try to turn it back on, it will either go into the loop again, or just sit at the HTC logo (left it there for upwards of an hour at one point).
I have found several threads about similar boot loop issues, but as I can't get into hboot/fastboot or recovery, I can't try to apply any of the solutions. I cannot connect from my computer with fastboot or adb -- "devices" lists nothing, and all other commands return either "error: no device found" or "waiting for device". No amount of power+volume down makes any difference, nor does holding the phone under a bright light as several threads suggested. Occasionally it will go to a black screen (not off, just black) that maybe it thinks is the bootloader menu, but it doesn't display anything, and after about 30 seconds it will reboot itself.
Does anyone have any suggestions for getting into recovery and trying to reflash.... something?
Alternatively, if I return it to Verizon at this point, will they be able to tell that it's rooted/unlocked/S-OFF?
Any ideas would be much appreciated!

brasstongue said:
I recently upgraded to an HTC One, on Verizon in the US. I promptly used rumrunner s-off to get S-OFF, unlock the bootloader, and obtain root. I also flashed the latest ClockworkMod recovery, with the intent of installing CyanogenMod, but decided I'd try out the stock ROM for a few days first, since my old phone was still on Gingerbread.
Everything was working fine until I decided to remove some Verizon bloatware. While I did back up each app before removing it, I forgot to make a nandroid backup. I only removed things that seemed nonessential -- such as the NFL Mobile app, Slacker radio, and My Verizon, which I'd also removed without issue on my old phone -- but apparently that was not the case, as after rebooting, I got stuck on the Verizon logo during the boot sequence.
I then attempted to perform a factory reset in CWMR, and it appeared to be stuck on "wiping cache", so -- like the impatient idiot I clearly am, as I later found a few threads explaining that this part of the reset process can just take a very long time -- I rebooted the phone to try again. This resulted in CWMR throwing errors about failing to mount several partitions, but it finally seemed to finish the reset on the second try. However, upon reboot, it just sat at the HTC logo forever.
After about an hour, and no success in finding anything on the internet indicating that it should take this long to boot up after a reset, I powered the phone off and back on again. After rebooting, the bootloader screen displayed "OS" in red followed by some random symbols. I could still get into recovery, and could still access the device with fastboot, so I decided to try to reflash the stock ROM, using the RUU zip found here.
Due to some problem (this was all about 6 hours ago while I was at work, and I was quite frustrated at this point, so I don't remember what exactly was the problem here) and based on the advice of another forum thread, I decided to try TWRP instead of CWM. But, TWRP wouldn't go any further than its logo splash screen, so I re-flashed CWM. Afterwards, my phone went into a reboot loop -- the HTC logo comes up, the phone vibrates shortly, and then after a few seconds the screen turns off and it does the same thing over again. If I hold the power button down for long enough, it will power down, but if I try to turn it back on, it will either go into the loop again, or just sit at the HTC logo (left it there for upwards of an hour at one point).
I have found several threads about similar boot loop issues, but as I can't get into hboot/fastboot or recovery, I can't try to apply any of the solutions. I cannot connect from my computer with fastboot or adb -- "devices" lists nothing, and all other commands return either "error: no device found" or "waiting for device". No amount of power+volume down makes any difference, nor does holding the phone under a bright light as several threads suggested. Occasionally it will go to a black screen (not off, just black) that maybe it thinks is the bootloader menu, but it doesn't display anything, and after about 30 seconds it will reboot itself.
Does anyone have any suggestions for getting into recovery and trying to reflash.... something?
Alternatively, if I return it to Verizon at this point, will they be able to tell that it's rooted/unlocked/S-OFF?
Any ideas would be much appreciated!
Click to expand...
Click to collapse
Can u get into bootloader?? Press power + vol down??

brasstongue said:
After rebooting, the bootloader screen displayed "OS" in red followed by some random symbols.
Click to expand...
Click to collapse
that means your firmware is either in a state of limbo, or you corrupted one of your partitions.
so I decided to try to reflash the stock ROM, using the RUU zip found here. Due to some problem
Click to expand...
Click to collapse
which ruu, and what was the problem
But, TWRP wouldn't go any further than its logo splash screen, so I re-flashed CWM.
Click to expand...
Click to collapse
Did you flash the correct recovery for Verizon (M7_WLS), it's different than international (M7_U/UL)
as @khandelwalsiddharth mentioned you need to get to bootloader if a fix is even possible, so POWER OFF your phone completely, then HOLD VOLDOWN and POWER, when it boots up let go of POWER but keep holding VOLDOWN until you get to bootloader
then you need to have working "fastboot devices" (if you're on Win8.1, you probably need to use another computer with Win7 or use a Linux Live USB)
if you can't get to bootloader, then I don't think this is fixable, cause hboot is corrupt

Thanks for the reply.
nkk71 said:
which ruu, and what was the problem
Click to expand...
Click to collapse
Oh, I guess I forgot to make that a link... I had downloaded the only VZW one on this page but I'm not even sure why I bothered to mention it, as downloading it to my computer was the only thing I ever did with it; I was never able to get as far as flashing it to the phone, so it actually had nothing to do with the problem...
nkk71 said:
Did you flash the correct recovery for Verizon (M7_WLS), it's different than international (M7_U/UL)
Click to expand...
Click to collapse
I was under the impression that Verizon was m7vzw, in which case yes, I was using the correct recovery (6.0.4.7 version listed next to "HTC One (Verizon)" on this page) and it was working just fine the first time I flashed it.
nkk71 said:
as @khandelwalsiddharth mentioned you need to get to bootloader if a fix is even possible, so POWER OFF your phone completely, then HOLD VOLDOWN and POWER, when it boots up let go of POWER but keep holding VOLDOWN until you get to bootloader
Click to expand...
Click to collapse
Yeah, I've tried this about 100 times, and the only thing holding VOLDOWN does is occasionally interrupt the boot loop to send me to the black screen for 30 seconds before going back into the boot loop. I did find one thread where the poster was able to get into the bootloader after letting the phone sit overnight, so I'll try again tomorrow, but I'm not very hopeful.
nkk71 said:
then you need to have working "fastboot devices" (if you're on Win8.1, you probably need to use another computer with Win7 or use a Linux Live USB)
Click to expand...
Click to collapse
I'm on Win7, and "fastboot devices" was working the other day, so I know my drivers are all set up properly and functioning. The phone just isn't booting far enough to connect to the computer.
nkk71 said:
if you can't get to bootloader, then I don't think this is fixable, cause hboot is corrupt
Click to expand...
Click to collapse
So... should be safe to take it back to Verizon and ask for a replacement, since they won't be able to tell it's unlocked? >_>

brasstongue said:
Thanks for the reply.
Oh, I guess I forgot to make that a link... I had downloaded the only VZW one on this page but I'm not even sure why I bothered to mention it, as downloading it to my computer was the only thing I ever did with it; I was never able to get as far as flashing it to the phone, so it actually had nothing to do with the problem...
I was under the impression that Verizon was m7vzw, in which case yes, I was using the correct recovery (6.0.4.7 version listed next to "HTC One (Verizon)" on this page) and it was working just fine the first time I flashed it.
Yeah, I've tried this about 100 times, and the only thing holding VOLDOWN does is occasionally interrupt the boot loop to send me to the black screen for 30 seconds before going back into the boot loop. I did find one thread where the poster was able to get into the bootloader after letting the phone sit overnight, so I'll try again tomorrow, but I'm not very hopeful.
I'm on Win7, and "fastboot devices" was working the other day, so I know my drivers are all set up properly and functioning. The phone just isn't booting far enough to connect to the computer.
So... should be safe to take it back to Verizon and ask for a replacement, since they won't be able to tell it's unlocked? >_>
Click to expand...
Click to collapse
my bad, thought I read Sprint, not sure if Sprint and Verizon use same recovery, but that doesn't really matter now
unless you can get to bootloader, you're stuck, sorry.
If your pc does see "fastboot devices" then it must be in bootloader and flashing a ruu.zip (if available) could (that's a very big could) get the device working again.

[Q] Sprint HTC One M8

Hey guys, Im fairly new to this stuff, but I got a question or two, it may take me a day to reply so i'll try to put as much info as posible.
Now recently I received the OTA 4.20 (Lolipop) on my phone, so I flashed my stock recovery to download the OTA, making me reroot my phone.
So my phone is re-rooted (after 2 tries) but now it seems like I cant write to my SD card, so I got fed up and went into TWRP recovery and selected wipe data and restore. (Restore point was before I got lolipop) I try to reboot but it takes me as far as HTC One screen. Next I go to recovery and try a factory reset, says its successful, but it lied to me! Still stuck at HTC One screen. So I flash back to stock recovery to try the factory reset with that, it went for a moment, then tried to boot, getting stuck at HTC one screen again, so once more, I flash TWRP to my phone in attempt to get the recovery back, but now I can't load recovery, or boot. So Im stuck there. Is there any advice to what to do from here? I tried command 'fastboot erase cache' thinking that would do something and reflashing the recovery.img but it's still not working. I hope someone can help me.

Sir,
Please wait until mods will move this thread to the device specific forum for more relevant answers.
Stand by
Good luck

The reason you can't write to your SD card isn't because of lollipop, that was actually added but on kit Kat, but the devs went and added a line of code to a file to allow it again. I am currently running my stock rooted, built from decrypted ruu, originally I wasn't able to but I added that one line of code. I believe all you have to do is flash a stock rooted and SD card write should be enabled. As for not being able to get into recovery or boot at all, boot to bootloader and ruu then flash twrp.

Ok so correct me if im doing something wrong, but I flashed the stock recovery in attempt to factory reset it, it wont work, so I flash TWRP with command line (Fastboot flash recovery twrp.img) And it's 'successful' but it wont load, it will attempt to load but one second in and it goes back to fastboot, how to I move forward from here?
Edit: so idiot me did it again, I was trying to install M7 version into a m8. Resolved, Now I can enter recovery again.

Alright, so now my only problem is now that it wont boot normally, it freezes at HTC one screen. I have access to TWRP recovery, just not sure what to do next from here.

ArthAngel said:
Alright, so now my only problem is now that it wont boot normally, it freezes at HTC one screen. I have access to TWRP recovery, just not sure what to do next from here.
Click to expand...
Click to collapse
I actually just unlocked my bootloader yesterday, installed TWRP today, and had what I thought was the same. The thing is, let it sit. Mine sat at the HTC ONE screen for what seemed to be between 5 and 10 minutes. I read that it happens in one of these threads.
But I let it sit and it eventually went to "Android is Upgrading" and was loading the apps.

dopy25 said:
I actually just unlocked my bootloader yesterday, installed TWRP today, and had what I thought was the same. The thing is, let it sit. Mine sat at the HTC ONE screen for what seemed to be between 5 and 10 minutes. I read that it happens in one of these threads.
But I let it sit and it eventually went to "Android is Upgrading" and was loading the apps.
Click to expand...
Click to collapse
Ok thanks, I'll post back in 20 minutes with an update.

So i've waited about 20 minutes on the HTC one screen, (Still on it as I post this) It is still stuck on it. I dont know if this helps but im able to view my internal and external card via computer cable, but I only see folders, no files of any kind in any of them..
Edit* I WAS able to read it, now I can't.

I GOT IT! I was able to revert to a backup I made. Even though I gotta flash stock again for OTA but F it! I got it working again. Thanks for all your help!

[Not Rooted] HTC one boot loop. currently in cwm recovery, but nothing working

Hello, so...where to start. Phone was original stock. It randomly froze and started boot looping. I had installed the Sprint update 6.23.651. 6 about a month prior to this. (the update made it sluggish)
So I did research, I went to Hboot, but recovery and factory reset didnt do anything. After selecting either one, it just started looping immediately. So tried fastboot commands, nothing work really except erase cache. ADB did not show anywhere even though my drivers were up to date. Contaced HTC and dowloaded the update application. Put the phone on fastboot, ran the wizard. when it was all done, it said it was finish updating. But was still looping. HTC told me i had to send it in and pay a fee. BS! i did nothing to my phone, they broke it with the updates.
Long story short, i figure how to unlock it. Great, so i started trying to flash updates that had the same CID and Model. To list last few:
1) Guru_Reset_M7_Sprint_1.31.651.2
2)Guru_Reset_M7_Sprint_3.04.651.2
3)RUU_M7_WLS_JB_50_Sprint_1.29.651.7
But none of them worked. Just gave me some error that i cant recal. tried other comands that further bricked my phone, like (fastboot flash boot boot_signed.img) (fastboot flash recovery recover.img). I have been working on this for 3 days, today is the 4th. After this, it would loop once and turn off. So i tried multiple recovery images out of the zips listed above. Those made it so that it finally say entering recovery, but then it would loop and turn off.
Then i kept reading that people are being told to relock the hboot (fastboot oem relock) and then flash the zip. Tried it with those 3 listed above again. the 12 signature error showed up of course.
Tried running the update 6.23....from spring, the wizard gave me some error, basically, my phone is way off to even set back to where it was at first.
After some research, I tried tried cwm 6.0.4.8-m7 to have a standard known recovery image flashed. I had actually tried it before but it didnt work. and for whatever reason, it lunched clockworkrecovery.
Here i erased data/factory reset. Also wiped the calvik data (something like that) since that what it says everywhere to do for first step. (kept a mental note that wouldn't fix my phone since it was further bricked than before i began). But before exiting the recovery mode, i noticed that adb commands were finally working! so i tried the two methods if found to install a rom. Sideload and push. Through side load, it takes forever to reach 100% but once it gets there it says
* failed to write data 'protocol fault (no status)' * {in cmd}
So i tried to push. after pushing it to the sdcard (internal btw) i got to the sdcard and run it. End result. *(bad) installation aborted * {on the phone}
so then im like whatever, lets reboot and see if anything changes. Bootlooping still. Recovery and factory/reset send me to bootloader now (it used to just loopboot). so i flash recovery again. Doesnt work. fastboot erase cache, then flash image, still not working. So i managed to remember some steps i followed that might of been the reason recovery worked. so I flash boot_signed.img, then flash recovery. doesnt work. so fastboot boot boot.img cmd responds but phone freezes, then manually turn it off. then get back into fastboot, flash recovery, erase cache, flash recovery(x3 times). and recovery works.
This is the 3rd time i got into recovery, but it takes me about 10 mins of doing the different combinations of the what i just mentioned before it goes through.
So im at the point where i could possibly get it fixed. But nothing seems to work
I would really appreciate it if someone could help me. I know that the rom has to match my hboot version? but im at hboot 1.6 and the only thing i found was here
http://forum.xda-developers.com/showthread.php?t=2795856
but that only gives me the firmware and the exe that doesnt work for me. I also tried to run the exe and during it, seach my C-drive for rom.zip. Apparently it creates a temporary rom. I pulled it out, it doesnt contain everything
Last thing i was going to do, was put relock it and run recovery. but because im not sure how to make recovery work every time from the get-go. when relocked, recovery didnt work, so i had to flash, thus i had to unlock, spent 10 minutes making it work and forgot that it was unlocked. I could try and see if i could relock and get recovery to run. But it could take forever to get it to work, thus is why im looking to see if there is anything i can do from recovery. (also, both time i was in recovery, i did erase wipe everything, so maybe thats why it wont work after reboot and have to reflash it)
This is where im on.
clockwork recovery window in phone.
phone stuff:
hboot-1.6 something
s-on
os 6.23.651...etc
cid SPCS_001
modelid: PN0720000
the guru zip mention above have the same cid and modelid as my phone according to
http://www.htc1guru.com/downloads/ruu-file-downloads/
Thank You, I hope i am as close to fixing it as i think i am.

madeofscars117 said:
Hello, so...where to start. Phone was original stock. It randomly froze and started boot looping. I had installed the Sprint update 6.23.651. 6 about a month prior to this. (the update made it sluggish)
So I did research, I went to Hboot, but recovery and factory reset didnt do anything. After selecting either one, it just started looping immediately. So tried fastboot commands, nothing work really except erase cache. ADB did not show anywhere even though my drivers were up to date. Contaced HTC and dowloaded the update application. Put the phone on fastboot, ran the wizard. when it was all done, it said it was finish updating. But was still looping. HTC told me i had to send it in and pay a fee. BS! i did nothing to my phone, they broke it with the updates.
Long story short, i figure how to unlock it. Great, so i started trying to flash updates that had the same CID and Model. To list last few:
1) Guru_Reset_M7_Sprint_1.31.651.2
2)Guru_Reset_M7_Sprint_3.04.651.2
3)RUU_M7_WLS_JB_50_Sprint_1.29.651.7
But none of them worked. Just gave me some error that i cant recal. tried other comands that further bricked my phone, like (fastboot flash boot boot_signed.img) (fastboot flash recovery recover.img). I have been working on this for 3 days, today is the 4th. After this, it would loop once and turn off. So i tried multiple recovery images out of the zips listed above. Those made it so that it finally say entering recovery, but then it would loop and turn off.
Then i kept reading that people are being told to relock the hboot (fastboot oem relock) and then flash the zip. Tried it with those 3 listed above again. the 12 signature error showed up of course.
Tried running the update 6.23....from spring, the wizard gave me some error, basically, my phone is way off to even set back to where it was at first.
After some research, I tried tried cwm 6.0.4.8-m7 to have a standard known recovery image flashed. I had actually tried it before but it didnt work. and for whatever reason, it lunched clockworkrecovery.
Here i erased data/factory reset. Also wiped the calvik data (something like that) since that what it says everywhere to do for first step. (kept a mental note that wouldn't fix my phone since it was further bricked than before i began). But before exiting the recovery mode, i noticed that adb commands were finally working! so i tried the two methods if found to install a rom. Sideload and push. Through side load, it takes forever to reach 100% but once it gets there it says
* failed to write data 'protocol fault (no status)' * {in cmd}
So i tried to push. after pushing it to the sdcard (internal btw) i got to the sdcard and run it. End result. *(bad) installation aborted * {on the phone}
so then im like whatever, lets reboot and see if anything changes. Bootlooping still. Recovery and factory/reset send me to bootloader now (it used to just loopboot). so i flash recovery again. Doesnt work. fastboot erase cache, then flash image, still not working. So i managed to remember some steps i followed that might of been the reason recovery worked. so I flash boot_signed.img, then flash recovery. doesnt work. so fastboot boot boot.img cmd responds but phone freezes, then manually turn it off. then get back into fastboot, flash recovery, erase cache, flash recovery(x3 times). and recovery works.
This is the 3rd time i got into recovery, but it takes me about 10 mins of doing the different combinations of the what i just mentioned before it goes through.
So im at the point where i could possibly get it fixed. But nothing seems to work
I would really appreciate it if someone could help me. I know that the rom has to match my hboot version? but im at hboot 1.6 and the only thing i found was here
http://forum.xda-developers.com/showthread.php?t=2795856
but that only gives me the firmware and the exe that doesnt work for me. I also tried to run the exe and during it, seach my C-drive for rom.zip. Apparently it creates a temporary rom. I pulled it out, it doesnt contain everything
Last thing i was going to do, was put relock it and run recovery. but because im not sure how to make recovery work every time from the get-go. when relocked, recovery didnt work, so i had to flash, thus i had to unlock, spent 10 minutes making it work and forgot that it was unlocked. I could try and see if i could relock and get recovery to run. But it could take forever to get it to work, thus is why im looking to see if there is anything i can do from recovery. (also, both time i was in recovery, i did erase wipe everything, so maybe thats why it wont work after reboot and have to reflash it)
This is where im on.
clockwork recovery window in phone.
phone stuff:
hboot-1.6 something
s-on
os 6.23.651...etc
cid SPCS_001
modelid: PN0720000
the guru zip mention above have the same cid and modelid as my phone according to
http://www.htc1guru.com/downloads/ruu-file-downloads/
Thank You, I hope i am as close to fixing it as i think i am.
Click to expand...
Click to collapse
Make sure you have latest HTC drivers installed on your computer, relock your bootloader and then launch the 6.23.651.6 RUU

Wow, I dont know why I didnt think of that. Everything must be running together.
Alright, so it updated. My phone is back to how it used to be looping like when it first broke. So, from here. Should I unlock it, flash the recovery to cwm, relock bootloader and see if it enters cwm recovery and try to push or sideload a rom?
when relock, i beleive it restarts, so i dont know if it that would stop the cwm recovery from working. Also, if i manage to get all of what i mentioned working. Wouldnt I get the 12 signature error?
Im sorry, its been days and nothing seems clear anymore since I havent been able to fix it

Desire 510 bootloop, even affects some HBOOT functions

Hello,
I fear my daughters european HTC Desire 510 is bricked. First of all, we have already given up on what is on the phone. So no worries if a solution means wiping EVERYTHING from the phone, as long as we can get it to start again.
For some unknown reason, possibly an update the phone went into an almost constant bootloop a month or so before christmas. It could eventually get to the login screen, after going in circles for anything between 20 mins and hours. So I thought I would try to tamper with it. I know how to get into the bootloader from rooting other phones, so I went there to try to reset the phone to the factory settings. The result was that the phone now wouldn't go there again. If I tried to do a second reset it went straight to boot, without any way to interrupt, same thing when trying to go into recovery, instant reboot in the blink of an eye.
What then happens when the phone reboots? It gets to the first screen, green HTC logo and "Powered by Android", it sits there for maybe 30 seconds, then it goes black, buzz and back to the previous HTC logo. And this goes on until the battery dies, I pull the battery or I quickly push the vol down and power buttons to go into HBOOT.
I usually don't give up this easily. I found another thread here on some european guy having trouble with his Desire 510, and one of the answers linked to a RUU for a european 510. So I thought, why not, I hadn't unlocked the bootloader yet. So I downloaded the RUU and tried to install it. It messed with me a little, aparently as expected, and then ran through the whole installation. Before the upgrade, well downgrade to be specific the OS was ver. 1.51.401.4 but now claims to be 1.51.401.1. Problem though is, absolutely no change in behaviour. I have restarted the phone after pulled the battery and waited for anything between seconds and an hour, and the phone does exactly the same thing. It happily goes into HBOOT but won't allow me to do a factory reset, nor will it allow me to access recovery.
It will allow me to access Fastboot though, so I thought, hmmm if I install ClockWorkMod or TWRP, maybe something will change. Since I'm more used to working with CWM I went down that road, went to htcdev.com, got the unlock code and unlocked the phone. It now says <<< UNLOCKED >>> and I ran the fastboot devices command, that happily returned some "CC4********7 fastboot". So I went ahead and installed CWM, the installation went all the way and in the end it happily stated that CWM was installed. But did that mean any difference, noooo. If I try to access either Recovery, that should start CWM or Factory reset and also Check smartsd, instant reboot. And I mean INSTANT. Fastboot works, as already stated. I can also get into Image CRC and Show barcode, but what good is that.
Any ideas. I'm beginning to think that something is physically broken inside the phone.