B450M Pro 4 build startup problems
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=12814
Printed Date: 03 Aug 2025 at 8:33pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: B450M Pro 4 build startup problems
Posted By: m0xte
Subject: B450M Pro 4 build startup problems
Date Posted: 05 Nov 2019 at 12:17am
Hi,
I just put together a PC with a B450M Pro 4 board in it. Build is:
Ryzen 5 2600X, 16Gb Corsair LPX RAM, Be Quiet 11 600W supply, ASRock RX550 Radeon, Corsair S400 case.
It doesn't always power up first time. If I hit the power button the power LED comes on and the fans spin but nothing happens. If I hit the power button to turn it off and go through this cycle 3-4 times it comes up fine. The build is otherwise stable and passes memtest86 24 hour cycle and several hours of transcoding. BIOS is 3.50 as recommended.
If anyone has any ideas on how to fix this I'd appreciate it. It's not end of the world but slightly disconcerting!
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Replies:
Posted By: Ray62
Date Posted: 05 Nov 2019 at 4:12pm
Are you using windows 10?
If yes, maybe the fast startup option is a problem (i had that problem after a windows update)
Please follow the steps as below to uncheck the "Turn on fast startup" under windows.
Step 1. Open the Power Option item in control panel.
Step 2. Click the Choose what the power button do link.
Step 3. Click Change settings that are currently unavailable.
Step 4. Clear the Turn on fast startup (recommend) check box.
Step 5. Click Save changes.
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Asrock Fatal1ty X370 Professional Gaming Offline
Under test:
MSI X570_MEG_ACE | AMD Ryzen 9 3900X | Scythe Mugen5 | 2x16GB F4-3200C14D-32GTZ@3466 | ASUS GeForce GTX 1080 Ti FE
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Posted By: m0xte
Date Posted: 05 Nov 2019 at 6:12pm
Hi,
Thanks for you reply. I am using Windows 10 and have already done that unfortunately.
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