My Asus zenbook UX305 went to sleep mode, power and caps lock buttons are lighted up but the screen is black. I pressed power button to force shut down. I pressed power button again for 30 sec but only power and caps lock buttons lighted up and still black screen. Can anyone help me on this pls? Thank you..
1. Turn the laptop off (not sleep or hibernate but off).
2. Connect an external monitor to the laptop.
3. Turn on the external monitor.
4. Turn on the laptop.
NOTE: You may have to press an "external monitor" button. Could be the f4 button or a button with two monitors on it, for the external monitor to work.
If you can see fine on the external monitor, then your attached display, or the ribbon cable that connects it, are your problem.
If you can't see on the external monitor at all, or the problem occurs on the external monitor as well, then it is probably the graphics card/GPU that is the problem, which may require the motherboard be replaced.