Showing results for 
Search instead for 
Did you mean: 
New member
2 1 0 0
Flag Post
HP Recommended
HP probook 4525s
Microsoft Windows 7 (32-bit)

I've recently upgrade my CPU. Yesterday was working fine. But now it won't boot nor have display.

This is what I've observed:

1. When I turned my laptop ON, the CPU fan spins a bit (less than a second)

2. I can hear the hard drive spinning

3. The caps lock blinks 5 times. My laptop does white LED indicator in caps lock (not dual LED) and doesn't have sound beeper.


I've already tried troubleshooting stuffs like:

1. Changing power source (battery only, AC only, and both)

2. Pressing power button for 15secs

3. Swapping to my old CPU. Now both won't work. Great. (Same problem as above)

4. I tried turning ON without CPU in the socket, but it still blink 5 times.


How could I fix this?


I've put thermal compound btw.

Who Me Too'd this topic
† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the Terms of Use and Rules of Participation