Video only responsive when plugged into external monitor
When the laptop boots without external display, it is completely responsive for about 2-6 seconds on the login screen, and then the display completely freezes (not black, freezes). Brightness controls still work, and certain keys do produce an error noise from the speakers when held, which leads me to believe that the computer itself is still functioning behind the frozen display.
When booting with an external monitor, the laptop works perfectly and mirrors the external display on the internal display perfectly, but will freeze within the same 2-6 second time frame after being unplugged from HDMI. Plugging the HDMI in after this freeze does not fix the issue.
Safe mode (holding Shift on startup) DOES NOT exhibit the same behavior, everything works as expected with no issues at all in safe mode, even when not plugged into an external monitor.
Any advice on what to do here is greatly appreciated.
Troubleshooting steps taken (all failed to change behavior):
- Turning off FileVault
- Reset SMC
- Reset NVRAM/PRAM
- OS reinstall (Catalina)
- Factory reset
- OS upgrade (Monterrey)
- New user admin account
- Disk Utility first aid
- GSX2 MRI diagnostics (came back with 0 issues found)
Cette question est-elle utile ?