HP elitebook 820 G4 LVDS not working

[harshana]

Motherboard: 6050A2854201-MB-A01

Hello. I purchased this laptop from ebay. Laptop turns on and also POST with external monitor. but nothing on inbuilt display.

Motherboard takes only 0.3A.

I tried to find schematics and I failed. So I need help.

what should I do.

[harshana]

Re: HP elitebook 820 G4 LVDS not working

Here what I noticed,

When I turn on laptop using external monitor I see bios there. but nothing on LCD. after I see bios, I removed VGA cable. then I was able to see LCD backlit there. but no images. Without External monitor, Nothing appears even backlit.

[harshana]

Re: HP elitebook 820 G4 LVDS not working

any luck

[mcplslg123]

Re: HP elitebook 820 G4 LVDS not working

You can refer to similar elitebook schematic with exact pin count on edp connector and start measuring voltages. Without any information its not possible for anyone to help.