I have an '07 Lexus GS, and after upgrading my PX6 to 8.1, the display no longer works. I ran the update, after rebooting, it showed the BIOS screen and said the install was successful. It said to remove the USB, which I did. Then the system rebooted again and went black. I waited and waited, but nothing came on the display.
I can see the backlight on in the back and my bluetooth connects (presumably after it boots up), and my A/C buttons still work. However, the display does not show anything other than a black screen. I believe the touch screen also is not working as nothing seems to respond. The steering wheel buttons don't seem to do anything either. I tried pressing the RST button briefly, as well as tried holding it down for 30 seconds multiple times. I also turned the car off/on several times, but I still have a black screen.
How can I go about getting my PX6 working again? Can I roll back my software to the factory version? Any help would be appreciated! Thanks!