HP Pavilion DV7

[davidske]

On power up the cap lock led will flash and the display is blank. I found I memory stick that was not seated. Re-seated the memory module and used compressed air to blow the laptop out. Rebooted with the same problem

 

[ratedk]

The number of blinks should narrow down most errors:

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01443366&cc=us&dlc=en&lc=en&jumpid=reg_R1002_USEN#N368