No BIOS LED No POST Nothing on Screen (Solved)
Printed From: ASRock.com
Category: Technical Support
Forum Name: Intel Motherboards
Forum Description: Question about ASRock Intel Motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=19643
Printed Date: 23 Jul 2025 at 5:01pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: No BIOS LED No POST Nothing on Screen (Solved)
Posted By: ColComputerFixer
Subject: No BIOS LED No POST Nothing on Screen (Solved)
Date Posted: 02 Oct 2021 at 1:50am
|
I spent a bunch of time debugging this issue and solved it, so I wanted to post to help out anyone else in this situation. My computer was working fine but then one day it would not boot and there was nothing on the screen. No POST message, no beeps, no nothing. But all the LEDs and fans were powering up. I tried removing the video card, the memory, most all other devices nothing worked. Then I checked the ATX Power supply 24 pin connector. Forced it on by shorting pins 16 and 17. Using a cheap multimeter was checked all the voltages. All the voltages seemed correct, which would explain why the fans were turning on. But the Power Good (Pin 8) signal was low (50 mV). The Power Good pin should read +5V to indicate that the power supply thinks it's generating the correct voltages. This was the issue. With a new power supply it booted again. https://ibb.co/b7YN2s6 |
Replies:
Posted By: ColComputerFixer
Date Posted: 02 Oct 2021 at 2:03am
 image didn't post in the first one |