Unable to flash ROM's - OnePlus Nord Questions & Answers

Hi all. I was rooted and running stock Oxygen, but decided to change ROM's. Booted to fastboot, booted into TWRP (fastboot boot twrp...) and then wiped and reset.
Now, I can't seem to boot ANY zip at all - not even the stock Oxygen...is it because I'm trying to flash the OTA?

I seem to have solved it via various wipes, resets and flashing via different recoveries..

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[Q] Flashed boot.img in Fastboot, works - flashed in TWRP, does not work

Hey guys, thanks for all the previous help i've gotten from here.
Here's the deal, I have a 2.2, rooted and unlocked ATT HOXL. I flashed the SU binary and have root and everything. I'm on the stock 2.2 ROM.
Do you need to install a different ROM before flashing the kernel? If so, then I will wait until this download finished for CleanROM. If not, then continue below..
I flashed the boot.img for ElementalX-3.1 in Fastboot (Fastboot 1.14), rebooted phone like normal, phone came up, kernel is showing in the information page on the phone, it is running at 1.7ghz. That's fine, but then I realized I had never gotten any installer or anything. So, I went into recovery to flash the whole ZIP file. Go to reboot the phone and it hangs on boot after the first HTC logo.
I tried flashing the boot.img, then rebooting to recovery, and flashing the ZIP, then clearing the cache, and then rebooting. Still hangs. I am able to go into recovery and restore a backup if I need to, so at least my phone isn't dead, but I want to do this.
I also tried installing the ZIP, then rebooting into Fastboot and flashing the img, and then booting the phone up normal.
So as it sits now, I have the Kernel installed from ONLY the boot.img, I did not run the ZIP.
Do I need to flash a stock kernel in Fastboot, and then try just flashing the whole thing in TWRP? From what I have read, the steps for flashing the kernel on 1.14 is:
1. Flash boot.img
2. Reboot to recovery
3. Flash ZIP
4. Clear cache
5. Reboot phone as normal
Are those the correct steps? Do I need to flash a stock kernel before trying this again, or can I just start from square one, as if I were using a stock kernel?
Thanks
You can't flash kernels from recovery on the higher hboot. You have to fastboot them or use the flash image GUI app.
Some ROMs/kernels use a script that works around that, but not all do.

Question on updating to CM-10.2 from stock 4.1.2

I flashed CWM in odin,but when i boot up into CWM it boots the stock recovery.Also,do i need to flash the bootloader and radio if coming from 4.1.2? I must be getting old..I did it on my last relay,but i don't remember how.Do i have to flash the bootloader first?
Thanks
The 4.1.2 stock image apparently has code within its start up routine to overwrite a custom recovery if one is detected at boottime. After flashing with ODIN, did you reboot into the system, or did you directly boot into CWM? If you're on 4.1.2 stock, there will be no need to update the bootloader or modem, you're on the latest. Try flashing CWM, and then immediately booting into recovery. You can also delete the files Stock calls to reflash the recovery from the image once you're able to get in via CWM, and utilize adb.
Magamo said:
The 4.1.2 stock image apparently has code within its start up routine to overwrite a custom recovery if one is detected at boottime. After flashing with ODIN, did you reboot into the system, or did you directly boot into CWM? If you're on 4.1.2 stock, there will be no need to update the bootloader or modem, you're on the latest. Try flashing CWM, and then immediately booting into recovery. You can also delete the files Stock calls to reflash the recovery from the image once you're able to get in via CWM, and utilize adb.
Click to expand...
Click to collapse
Yes,i booted into the system,then restarted into CWM...I'll try reflashing,and booting right into recovery and let you know,Thanks for the reply!
Yep,that did it...Got it up and running..Thanks again Magamo..

installing TWRP dont work

I have two devices where install TWRP dont work.
They are unlocked and i try many times to flash it via fastboot but booting into recovery ends in stock recovery.
Is there any solution to install TWRP or lineageos another way?
it was the issue that recovery is overwritten on stock rom start if the system has ever made an update

Can't enter recovery mode ufter update

Hi, after update to OTA 10.3.4 i've lost recovery. I've tried to flash it with the All in One Tool, only to get stuck. I've recovered it flashing a stock ROM (wiping all my data in the process), but I can't flash or boot in recovery. I've tried fastboot flash recovery twrp-3.3.1-18-enchilada-Pie-mauronofrio.img and many other recoveries, but although the proccess ends OK it never enter recovery, no matter how many times I try. Any help would be appreciated.

Boot to fastboot after flashing any custom ROM

Hello,
I have Samsung J4 core (j410f) rooted with stock ROM.
I wanted to install a custom ROM and tried to flash lineage os 17.1 (unofficial). What i did is:
1. Flashed TWRP 3.1 using odin
2. Wiped every thing (Data, Cache, System)
3. Flashed lineage successfully
4. Rebooted the phone. But got straight to fastboot.
5. To fix this I flashed stock firmware and it booted normally.
I tried again with different versions of lineage, same result. Used other ROMs like havoc, again the same. Changed recovery with orangefox instead of twrp, no difference.
The thing is I can use custom recoveries with stock ROM without a problem. But I can't flash any ROM without resulting in fastboot. Can anyone help me here? Please??
Now, I know this forum is from a long time ago, but did you get any errors when installing LineageOS for the first time? (like E1001 or something)

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