Help! Can't get past boot logo - Nexus 5X Q&A, Help & Troubleshooting

Okay, so my phone just crashed randomly while in snap chat... so it goes to boot and will not get past the boot logo... all it does is try to boot then stop and try again over and over. I can get into fastboot and flash stuff but I can not get into recovery, same problem, cant pass boot logo. I was able to access twrp once (dumb me did not backup internal storage) so I downloaded pure nexus rom and everything I needed. (I was on lineage 7.1.1) So I wipe and stuff like usual (not internal storage) then I start to flash it then it stopped when it was trying to flash "system" now I'm back on the problem I had earlier... can't get to recovery, cant charge, cant boot because theirs is like not system, I don't want to clear internal storage but I need to fix this.
Help
Thanks,

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[URGENT] HELP! Stuck at Google logo on boot

I just used the nexus toolkit 5.4 to unlockboot loader, flash CWM touch, root phone and managed to boot to recovery. In the recover i did a format/system and now i cannot boot my phone! It just gets stuck in the Google logo screen with the unlocked symbol at the bottom. Help! I cant even mount my phone to copy a ROM over to flash!
EDIT: I cant seem to mount any sdcard to the phone! OMG Please help me! Did i just wipe everything and have nothing to fall back on anymore? DO i have to send it back to samsung?
EDIT 2: Now when i press wipe/data factory reset, it gets to the formatting data part and it just gets stuck for a long time before it says "Error mounting /data!" then it goes to "Skipping format..." and goes to format my cache, sd-ext and so forth. What can i do now? Is there some advance method I can use to restore my OS? Please help me!
NEvermind i fixed it.
I just remembered i downloaded the stock Android 4.0.2 image from google. So i just used the toolkit to restore stock google image and its all back to normal. What an adrenaline rush!

[Q][Very serious]Non-booting/non-changing/not working problem

I woke up today to a bootloop. After pulling out the battery, I cant turn it on, it was stuck at the google logo. I thought it was some rom issue or something. When I had the time, in the afternoon, I just boot to recovery, and wiped data+sd card. Turns out sd card was not wiped.
Just now, I found a way to boot it. (AFTER WIPING DATA) I used the gnex toolkit and boot with insecure image, and guess wat? My old rom boots. Everything was the way it was, and then it crashed and stuck on the google logo again.(I made sure i wiped things two to three times, data and sd) I did a few experiments:
1) Flash using ODIN
2) Flash CWM using toolkit--it changed back to twrp after reboot
3) Changing the icon on my homescreen after boot--- everything was the same again after booting
4) Flash stock image using toolkit
5) Wipe data using manual adb
6) Try to lock my bootloader

Can't wipe/edit data patition

I finally flashed a non Sense ROM onto my dev edition M8, and now I can't even touch /data. I got the enter password to decrypt storage bug while using Paranoid Android, so I followed the steps here to get back to a working system, but the ROM never booted to the password screen. It froze on the boot animation, the went in a loop, I tried to wipe data through recovery, the screen went blank after a few seconds, and then tried to boot the system again. I can't get it to wipe via fastboot either as I get a "FAILED (remote: not allowed)" when trying erasing and formatting data/userdata. I also can't delete anything from /data in recovery. Does anyone have a fix for this? Flashing other ROMs also suddenly quit and go back to trying to boot the system.
Edit: Flashing a stock recovery to wipe /data fixed it. Why didn't I think about that sooner?

Stuck in install loop - keeps getting wiped on boot?

I'm trying to install LineageOS 17 on a OnePlus 6.
I can boot into twrp and the install process appears to work successfully. I can swap slots and install into either slot.
When I reboot the phone I get to the screen that says "Start" and "Fastboot mode" at the top. If I try to start the phone it comes back to this screen. When I go back into twrp, the contents of /sdcard is empty. I can copy over files using adb push, install the rom and then reboot. However, every time I reboot it seems like it completely wipes the phone including the install it's just done and /sdcard is also wiped.
When I booted into twrp previously, it required my unlock code. It now no longer does that. I wonder if this is part of the problem?
If I install just oxygenos, it takes me to the oxgenos recovery screen but I cant' do anything from there. I'm guessing that won't allow me to boot with an unlocked bootloader?
Can anyone advise how I can get out of this? Installing anything using twrp looks like it works, but it's like it gets wiped every time I reboot.
I can't even seem to get OxygenOS back to working.
Can anyone give me some tips on where to go from here? Nothing I can do from TWRP seems to help. I have tried wiping everything in both slots and reinstalling oxygen, no luck
Still stuck?

HELP - stuck in fastboot/bootloop, can't reach after Sony logo

Hi guys!
Today I tried again to install TWRP on my Sonyh Xperia XZ2C because LineageOS Recovery doesn't provide Nandroid backup, which is a shame.
I tried many ways described over the web, none of those worked, and I ended up with a boot loop at startup with that naughty message "your device is corrupted it cannot be trusted and will not boot". I can't boot to Lineage, neither to recovery. I'm stuck.
With device turned off, I can eventually press volume down, plug it to computer, access fastboot mode (blue led), flash+boot the LineageOSrecovery.img, then the device restart, Sony logo appears... and that's all, I'm stuck with logo in boot loop, and I can't go anywhere further.
I tried to change boot slot (without knowing if it could help with this problem at all) but I alway get "unknown option".
I'm panicking right now, I can't find any way out to this bootloop, if someone could help it will be sooo appreciated!
I tried hard to find a solution for 4 hours now, I'm completly stuck and I can't even sleep. That's why I finally reached out here.
For an unknown reason, I succed to boot on Lineage Recovery (not TWRP) this morning. I flashed LineageOs rom.zip using adb sideload. After rebooting, the recovery tolds me that I had to wipe everything because the system partition seems to be corrupted, so I did.
I'm a bit tired to lost everything since I made all of this to do Nandroid backups with TWRP........ but I have a fresh new install, my phone works again so it's fine.
But I still need to make Nandroid backups. If someone had ever successfully booted/flashed TWRP on his XZ2C without bricking it, It will be really appreciated for sharing is knowledge

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