Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

i have this Compaq Presario CQ40 Laptop and when i turned on the machine, it shows no display, it seems no interaction with the monitor. And there's a led that continuously blinking 4 times then pause then 4 times then pause..

any help please..

what would be the problem on my laptop..

share|improve this question
up vote 1 down vote accepted

Something is wrong with your graphics card / subsystem:

HP Support Blank Screen Error Code

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.