Hi everyone it's nice to come back to the forum, I've been testing a desktop HP that powers on, hear noises on the Hard Drive but not showing anything on the screen.
The power supply is just fine (tested)
When inserting the PCI POST Card it remains on 00. Also just:
+12V lights red
-12V lights amber
+5V lights red
+3.3v lights red
I removed all of the memories RAM, rebooted and still the same what could be the cause?