I am working on my Asus Q501LA touchscreen laptop. The display is very faint, I have already tried to replace the LCD, but to no avail. I'm trying to find out what else may cause this issue. Thank you for your help.
If the display too low even on wall power? Did you check power settings? BIOS update? Reset power options to defaults? Check for newer power manager driver from ASUS if they have one?
Did you check the backlight also or just the LCD pannel?