B550 Phantom Gaming 4ac
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=21159
Printed Date: 05 Feb 2025 at 2:48pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: B550 Phantom Gaming 4ac
Posted By: bde_au
Subject: B550 Phantom Gaming 4ac
Date Posted: 31 Jan 2022 at 2:29pm
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Hi there I am trying to get a new build working but cannot get the system to POST. Symptom: The CPU and DRAM lights on the board flash, CPU fan spins but case fan pulses and does not spin. Mobo: B550 Phantom Gaming 4ac CPU: AMD Ryzen 5 5600X Memory: DDR4 ADATA 3600 3600 8GB AX4U360038G18A-DT60 Storage: Firecuda 520 500GB M.2 Can someone please advise best course of action? Cheers Brendon |
Replies:
Posted By: kerberos_20
Date Posted: 31 Jan 2022 at 7:25pm
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where is your GPU? ------------- http://valid.x86.fr/diq4l4" rel="nofollow">  http://www.userbenchmark.com/UserRun/47132492" rel="nofollow - userbenchmark |
Posted By: Xaltar
Date Posted: 01 Feb 2022 at 12:46am
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Kerberos_20 has a point, you need a GPU with the Ryzen 5 5600x. The display outputs on the motherboard only work with APUs (Ryzen XXXXg). ------------- 
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Posted By: bde_au
Date Posted: 02 Feb 2022 at 4:00pm
| The GPU is an ancient thing that I am struggling to find the model for. The behaviour is the same with the GPU inserted or not. |
Posted By: Xaltar
Date Posted: 02 Feb 2022 at 11:21pm
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Some older GPUs (PCIe v1.1 and older) may not work on newer boards. It can be hit and miss, some do, some don't. Particularly older Quadro and Firepro cards seem to not work. Also check what BIOS version is on your board, the version it shipped with will be printed on a small white sticker on the BIOS chip itself. Once you have the version you can check it against the CPU support list here: https://www.asrock.com/mb/AMD/B550%20Phantom%20Gaming%204ac/index.asp#CPU" rel="nofollow - https://www.asrock.com/mb/AMD/B550%20Phantom%20Gaming%204ac/index.asp#CPU As you can see, if your board shipped with an earlier version than 1.20 then your CPU will require a BIOS update to work. For this you will either need a compatible 3000 series CPU or to take your board in to a service center/store and ask them to do it for you. -------------
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Posted By: bde_au
Date Posted: 03 Feb 2022 at 2:37pm
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The GPU is PCIe 2.0. The BIOS is 1.80 so it should be compatible. I appreciate the suggestions. |
Posted By: bde_au
Date Posted: 04 Feb 2022 at 7:04am
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The updated component list: Mobo: B550 Phantom Gaming 4ac CPU: AMD Ryzen 5 5600X Memory: DDR4 ADATA 3600 3600 8GB AX4U360038G18A-DT60 Storage: Firecuda 520 500GB M.2 PSU: MSI MPG A750GF GPU: GIGABYTE GeForce GTX 1050 Ti Low Profile |
Posted By: Xaltar
Date Posted: 05 Feb 2022 at 12:48am
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Thanks for the full parts list, it helps a lot. First up, disconnect power from the mains then pull the CMOS battery. Once you have the battery out find the Clear CMOS jumper (should be listed in your user manual) and set it to the clear position. Leave the system like this for 10 mins or so the put the jumper back to it's normal position and replace the battery. Make sure your RAM is in slots A2 and B2 and reconnect power to the system and try to power up. If you only have a single RAM module it should go in slot A2. Let us know what happens, hopefully you get a POST screen. -------------
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Posted By: bde_au
Date Posted: 25 Apr 2022 at 3:12pm
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So after a long hiatus interrupted by my son wanting his PC back I have performed some additional troubleshooting. Luckily I have two of everything as I was updating both my sons PC's. Using the original MOBO I have swapped CPU and memory. I swapped the MOBO and did the same. Alas same behaviour. CPU and RAM lights flash on the board and the chassis fan pulses. What the heck am I missing? Oh and I used a jumper on the original config. Same behaviour. All suggestions appreciated. |