MOBO will not POST with Monitor plugged in
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=18350
Printed Date: 23 Jul 2025 at 5:30pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: MOBO will not POST with Monitor plugged in
Posted By: itsnotbroken
Subject: MOBO will not POST with Monitor plugged in
Date Posted: 13 Mar 2021 at 11:58pm
Hi,
Symptom:
When I press the power button, no beeps, and the fans spin up, but the machine never starts.
TO find the issue, I pulled one peripheral at a time until I discovered that if the monitor is disconnected, it will POST, and beep once (normal) and boot up correctly.
If I restart from the OS or command line, it will reboot fine. The issue is only on power off/power on situation.
This started around a year ago, and Yes, I have been leaving the machine on 24/7 unless I will be gone for extended period.
This build is about 6 years old, worked perfectly until about a year ago. To my knowledge, no system changes that would have caused this.
Corsair CX600
AsRock H97M Pro4
Pentium G3258 @3.2GHz
Corsair Vengeance LP 2X4GB
No Name RAM 2X2GB (I already removed these for troubleshooting, I have not put them back)
Nvidia Quadro 4000
Kingston SV300 120GB
WD Blue 160 GB
Ubuntu 20.04 LTS
I know the machine is 6 years old, but it has been great for everything I need.
I was thinking of picking up a used i7-4790K or Xeon to get another year or 2 out of it.
What other items can I check or test to make sure it's not my Vid Card£
Could it be the monitor£
Thanks,
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if it's not broken...
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Replies:
Posted By: itsnotbroken
Date Posted: 28 Sep 2021 at 12:18pm
UPDATE.
NOTHING WORKS.
NO PERIPHERALS PLUGGED IN, FANS SPIN, NO BEEPS
I ASSUME THE MOBO IS DEAD.
THANKS FOR THE HELP HERE.
NO MORE AS ROCK IN MY FUTURE..
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if it's not broken...
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Posted By: The_Nephilim
Date Posted: 28 Sep 2021 at 2:27pm
I would check the Power supply
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