Hi,
After a few years the screen of L321X gave up. It turns black, completely black and even bios not showing up, but backlight is on. Connected to external display and run system diagnostics. Everything passed, system, cables, built-in LCD display, RAM, CPU, graphics card ....
Run screen self diagnostics by power up while holding key D. Screen shows nicely Grey, Red, Green, Blue, then turns off and reboot.
Unplug and replug in video cable and problem persists. Updated bios to A08 and load bios default. Not working. Unplug battery cable and hold power for >30 sec, nothing changes.
It seems system is working, LCD screen is working, cable is working. The only thing I did not try is removal of CMOS battery, which I have to remove system board firstly. Can you help me to find out what the problem is?
Thanks,