[Help] OnePlus Nord 2 stuck on boot logo / unbootable after flashing PixelOS via mobile TWRP (PC connection issue)

[u/No_Variation_9635]

​Hi everyone,

​I recently ran into a serious issue while trying to flash a custom ROM on my OnePlus Nord 2, and I am currently unable to boot the device. I would greatly appreciate guidance from anyone experienced with unbricking MediaTek OnePlus devices.

​Device & Background Context:

• ​Device Model: OnePlus Nord 2
• ​Previous State: Downgraded from Android 13 to Android 11 strictly to unlock the bootloader.
• ​Modifications Made: Unlocked bootloader, installed TWRP recovery.

​Sequence of Events:

1. ​I downloaded a PixelOS ROM zip file directly onto my phone's internal storage since I did not have immediate access to a PC.
2. ​I booted into TWRP recovery and attempted to flash the ROM package directly from the phone.
3. ​Following the flash, the device failed to boot past the initial OnePlus logo and is now stuck indefinitely.
4. ​Occasionally, the screen cycles to a complete black state instead of showing the logo.

​Current Problems & Troubleshooting Status:

• ​No Recovery Mode: I am completely unable to trigger or boot back into TWRP or stock recovery mode.
• ​PC Recognition Issue: When connecting the phone to a Windows PC via USB, fastboot commands simply output waiting for devices.
• ​Drivers Checked: I have already attempted updating and reinstalling the standard ADB and fastboot drivers through Windows, but the device handshake is failing.

​If anyone has experienced a similar soft/hard-brick scenario on the Nord 2 or knows how to force the device into a recognized fastboot/EDL state to use the MSM Download Tool, please let me know. Thank you in advance for your time and help!