HTC one M8 Bricked in a confusing way...

[Abd121]

(downloads were from this guide: https://forum.xda-developers.com/htc-one-m8/general/vomerguides-m8-bootldr-unlock-s-off-t2800727)

I was trying to unlock/root the phone through the official way, I successfully unlocked it and installed TWRP 2.8.5.0 and booted the device, everything is working fine so I decided to flash the SU. I booted to the recovery but the UI was flashing, I assumed it was just a visual bug and went on, flashed the zip and afterward every click was lagging. I tried to reboot but now It's stuck on the HTC logo, it doesn't go anywhere, I can't even hold the power to shut it down (Had to freeze it to empty the battery) while it's off I can go to the bootloader and all the options in it like the fastboot and recovery which is still laggy and has a flashing UI (I made a backup to check if it's working). I considered loading a different ROM on an SD and try to flash it and see if that fixes it but I can't risk this getting worse.

any ideas what to do in the situation? I've been doing this since the GNexus so no need for an ELI5


what Info I currently know:

bootloader info:
software: official
M8_UL PVT SHIP S-Off (was already that I didn't unlock it )
HBOOT 3.19.0.000
OS 6.12.401.4
openDSP 51.2.2-00593-m8974_f0.1015
CID-HTC__A07
Dec 17 2015,14:15:48.90021118

fastboot info:
(bootloader) version-bootloader: 3.19.0.0000
(bootloader) version-baseband: 1.29.214500021.12G
(bootloader) version-main: 6.12.401.4
(bootloader) product: m8_ul
(bootloader) modelid: 0P6B10000
(bootloader) cidnum: HTC__A07

stock HTC Android Rom last Marshmallow update
TWRP 2.8.5.0

 

[ckpv5]

That's is not stock lollipop, that's the latest stock Marshmallow.

TWRP 2.8.5.0 won't properly work on it. You need TWRP 3.x.x.x and make sure to install SuperSU 2.79 the lowest version or use the current one 2.81 or 2.82

 

[Abd121]

That's is not stock lollipop, that's the latest stock Marshmallow.

TWRP 2.8.5.0 won't properly work on it. You need TWRP 3.x.x.x and make sure to install SuperSU 2.79 the lowest version or use the current one 2.81 or 2.82

sorry I meant Andriod 6, 'Lollipop' was a mistype (names are changing too fast recently)

I borrowed an SD card and loaded an SU removal script on it and installed the one TWRP had in it, will see if I boots, currently it's displaying the red DEV text in addition to the HTC logo instead of only the logo

if It booted; I should flash a newer TWRP then I clear right?

 

[redpoint73]

sorry I meant Andriod 6, 'Lollipop' was a mistype (names are changing too fast recently)

I borrowed an SD card and loaded an SU removal script on it and installed the one TWRP had in it, will see if I boots, currently it's displaying the red DEV text in addition to the HTC logo instead of only the logo

if It booted; I should flash a newer TWRP then I clear right?

The TWRP version 2.8.5 is really old (over 2 years) and sure to cause problem. Just flash the TWRP version as directed by ckpv5, that guy knows what he is talking about.

---------- Post added at 10:47 AM ---------- Previous post was at 10:44 AM ----------

I tried to reboot but now It's stuck on the HTC logo, it doesn't go anywhere, I can't even hold the power to shut it down (Had to freeze it to empty the battery) while it's off I can go to the bootloader

To force a reboot, hold vol up + power, may need to hold the buttons for a minute or so in the "stuck condition". Once the screen goes black to reboot, let go of the buttons, and only hold vol down, and don't let go until you see the bootloader screen. If this fails to work (just reboots to HTC logo screen), you just got the timing wrong; either started pressing vol down too late, or let go too early. Just repeat the process, until you get the timing right.