A520M Gaming - not booting to bios

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   I have built a new PC on the A520M Phantom Gaming 4 motherboard, and it won't boot into bios - absolutely no dsiplay at all.

Not yet loaded windows as cannot get that far.

I switch on, press power button and lights come on, fans run but that is all.
I have no additional boards installed, and even removed the USB connections. I have tried both HDMI and DP video out.
Items installed are -
  A520M Phantom Gaming 4 motherboard
  500W GameMax RPG Rampage 80 Plus Bronze PSU
  Kingston FURY Beast 32GB (2x16GB) 3200MT/s DDR4 Memory Kit (with both and one stick (slot A2 & B2 - or only B2)
  AMD Ryzen 5 5500 6 Core/12 Thread AM4 CPU 

I have tried removing the CMOS battery and replacing.

I have previously built a few PCs (one last week using B550 Phantom Gaming4 MB)

Please point me where I am going wrong.

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pads Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 12 Dec 2024 Location: Leeds uk Status: Offline Points: 50	Post Options Post Reply Quote pads Report Post Thanks(0) Quote Reply Topic: A520M Gaming - not booting to bios Posted: 12 Dec 2024 at 11:43pm
	I have built a new PC on the A520M Phantom Gaming 4 motherboard, and it won't boot into bios - absolutely no dsiplay at all. Not yet loaded windows as cannot get that far. I switch on, press power button and lights come on, fans run but that is all. I have no additional boards installed, and even removed the USB connections. I have tried both HDMI and DP video out. Items installed are - A520M Phantom Gaming 4 motherboard 500W GameMax RPG Rampage 80 Plus Bronze PSU Kingston FURY Beast 32GB (2x16GB) 3200MT/s DDR4 Memory Kit (with both and one stick (slot A2 & B2 - or only B2) AMD Ryzen 5 5500 6 Core/12 Thread AM4 CPU I have tried removing the CMOS battery and replacing. I have previously built a few PCs (one last week using B550 Phantom Gaming4 MB) Please point me where I am going wrong.
	Peter

jdillipl Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 03 Aug 2017 Location: USA Status: Offline Points: 174	Post Options Post Reply Quote jdillipl Report Post Thanks(0) Quote Reply Posted: 16 hours 18 minutes ago at 4:54am
	From what you posted, you have no video card installed. The Ryzen 5 5500 has no video capability, so you need to add a video card, or swap the CPU for one with integrated video. Jake
	Asrock X370 Killer SLI/ac, Amd Ryzen 7 1700, GSkill FlareX F4-2400C16D-32GFX, RaidMax Thunder V2 735W PS

pads Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 12 Dec 2024 Location: Leeds uk Status: Offline Points: 50	Post Options Post Reply Quote pads Report Post Thanks(0) Quote Reply Posted: 14 hours 29 minutes ago at 6:43am
	Therefore why does the motherboard have video outputs. In any case, before stripping all accessories off, I had a EVGA Geforce GTX970 installed - still no video? Peter
	Peter

Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Offline Points: 24773	Post Options Post Reply Quote Xaltar Report Post Thanks(0) Quote Reply Posted: 53 minutes ago at 8:19pm
	The display outputs are there for CPUs that have an iGPU built in. They serve no purpose when a CPU without an iGPU is installed. The GTX 970 may be too old to work on your board without CSM legacy mode enabled. Given you can't get the system to POST you have no access to the setting. Your only options are to clear CMOS (with the 970 installed) and hope it enables legacy mode by default or to get a newer dedicated GPU. I suppose you could also try returning the CPU and getting a 5400g or similar that has an iGPU. Good luck.


pads Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 12 Dec 2024 Location: Leeds uk Status: Offline Points: 50	Post Options Post Reply Quote pads Report Post Thanks(0) Quote Reply Posted: 30 minutes ago at 8:42pm
	Xaltar Thanks for updating about the CPU issue - I hadn't realised that before. Ive never built a pc without using a graphics card. (That is except for very early days when there were 'proper' built in graphics) Just tried clearing CMOS to no avail. I like your advise about swapping the CPU - but what if it turns out to be a faulty m/b? Peter
	Peter