I have a compaq laptop power comes on but screen is black n caps lock blinking

BadAsAl

Distinguished
How many times does it blink? Do any other keys blink like the Num Lock key? Count how many times either or both blink and then you can search for "Compaq blink codes" and it should take you to an HP site that will tell you what they mean.
I have personally had this happen on 2 laptops and the first one was a bad processor that needed replacing and the second had a bad graphics chip (brought back to life by baking the motherboard in the oven).
 

cosgrays

Estimable
Jul 28, 2015
2
0
4,510


2 times and tried taking the battery out and reset it still black screen
 

boomeorgh

Estimable
Jul 29, 2015
2
0
4,510
It sounds like either your firmware is faulty, or the motherboard failed.
9oF4s9
 

Brian_5

Estimable
Sep 3, 2015
2
0
4,510