Cpu and Dram red lights
Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=50152
Printed Date: 21 Jul 2025 at 11:49am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: Cpu and Dram red lights
Posted By: Eerie_Von
Subject: Cpu and Dram red lights
Date Posted: 13 Jul 2024 at 9:22pm
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So like the subject says I'm getting two red solid lights on cpu and dram. This started when I went to restart the system because the mouse pointer had vanished. Once I did then this problem started. I've tried re-seating every component, clearing the cmos, and booting with minimal hardware, but still same issue. When I power the rig on all the fans come on, like everything is getting power. So I don't know if this a power supply or mobo problem...or something simple that I've missed. Any help would be great. I've got a B550 phantom, with Ryzen 5 5600, and corsair vengeance ram. |
Replies:
Posted By: Xaltar
Date Posted: 13 Jul 2024 at 10:56pm
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Solid RAM and CPU being on could mean either a dead CPU or, more likely, a dead power supply. If the 12v provided by the PSU is too low or is drooping too much when loaded the lights will remain lit to indicate the CPU was unable to initialize. ------------- 
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Posted By: Eerie_Von
Date Posted: 14 Jul 2024 at 12:30am
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I'll check the power supply. The system is fairly new, built in April of this year. So I was hoping that wouldn't be an issue. But that appears to be my next step. Appreciate the reply. ?? |
Posted By: Eerie_Von
Date Posted: 14 Jul 2024 at 12:31am
| ...those ?? Shouldn't have been there...pay them no mind. |
Posted By: Eerie_Von
Date Posted: 14 Jul 2024 at 3:38am
| Checked the power supply and I am getting correct voltage from all the pins. Looks like it is my mobo... |
Posted By: Xaltar
Date Posted: 14 Jul 2024 at 5:09am
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A voltmeter is not going to tell you everything you need to know about a PSU. If the 12v rail is rippling too much the board will not allow POST for example. I have often had PSUs test out fine on the bench with a multimeter but still not function correctly in a system. Be it load causing droop or ripple (fluctuation) or even over/under amperage. The only way to rule out a PSU as faulty is to test with another, known good PSU or testing it with an oscilloscope for load droop and ripple. In my experience, it's almost never the motherboard unless there was a dead short somewhere or a blown capacitor etc. In other words, usually, when the motherboard goes there are obvious signs. Going out with a whimper is usually the PSUs M.O. Hope this helps. -------------
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