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B550M Pro4 + new build - won't boot

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Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
Printed Date: 09 Dec 2021 at 12:42pm
Software Version: Web Wiz Forums 12.04 -

Topic: B550M Pro4 + new build - won't boot
Posted By: gascantx
Subject: B550M Pro4 + new build - won't boot
Date Posted: 28 Aug 2021 at 6:12am
Hi. I am in need of some help...

I have a new build of the following:

Motherboard: ASRock B550M Pro4
CPU: AMD Ryzen 5 1600
RAM: G.Skill TridentZ RGB DDR4-3000 8GBx2
Video Card: Diamond Multimedia AMD Radeon HD 5450 PCI Express
Power Supply: EVGA SuperNOVA 120-GP-0650-X1, 650 G+, 80 Plus Gold 650W

I have the hard drives and all other peripherals unplugged.

The system will not complete POST. I get NO output on the display (via HDMI cable).

I have changed the slot for the video card - no change in symptoms.

I have wiped the CMOS (one time by pulling the battery, the second time by jumpering the pins) - no change in symptoms.

What am I missing?

thank you.

Posted By: Khun_Doug
Date Posted: 28 Aug 2021 at 2:50pm
Hi Gascantx,

The first thing I would try is removing one stick of RAM and leave the remaining stick in A2 (from what I can gather from the user manual, that is the slot for a single stick config). If that won't start, try swapping the sticks.

If that doesn't work, you could have a defective GPU, PSU, or CPU. If you have a spare GPU available, just something enough to get video to a display, I would try that. I doubt it's the PSU, but check to make sure the fans are spinning. And lastly, it could be the CPU is cooked. I would think the CPU is your most likely culprit, followed by the GPU.

Posted By: Xaltar
Date Posted: 28 Aug 2021 at 10:08pm
The 1600 isn't on your CPU support list, not even the 2600 (1600AF would work if
it was). You will need a compatible CPU or a 400 series board depending on what is
easier/cheaper for you.


Posted By: Khun_Doug
Date Posted: 28 Aug 2021 at 10:12pm
Good catch Xaltar. I assumed the op knew to check CPU compatibility. That's what I get for responding at 3AM.

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