ASRock A520M Gaming - not booting to bios

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pads

New Member
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 -
ASRock 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 or B1)
AMD Ryzen 5 5500 6 Core/12 Thread AM4 CPU
EVGA Geforce GTX970 -- come straight out of a working pc the day before.

I have tried removing the CMOS battery and replacing.
I've checked all voltages from power unit and all are correct, so I don't think its a voltage issue. Must be either M/B, cpu or ram. I suspect m/b.

I have suscessfullt previously built a few PCs (one last week using B550 Phantom Gaming4 MB) without problems.

Please point me where I am going wrong.
 
Do you have a speaker attached to the Front panel on the motherboard? That way you should be getting bios beeps to tell you what the error code is. My guess its one of 2 things.

1. Motherboard shorting out somewhere on the case. Remove motherboard from case and try powering on. It's also possible that one of the metal tabs from I/O shield is inside one of the motherboard back ports.

2. The bios needs to be updated to support the 5500 as it requires version 1.6. But in order to do that you'll need to have a cpu that is supported by the original bios in order for it to boot and update bios. The cheapest would be the 3100.

But I highly suspect that there is a motherboard short somewhere. As I said, remove it from the case leaving front panel wires connected and try turning on.
 
An update for further information....

I am building two PC for my two grandsons - one already built and working and this one.

So I have just tried swapping the graphics card from the working one to this.
ASUS GeForce RTX 4060 Dual Evo OC 8GB GDDR6

But it still isn't working so that lets out the graphics side of the problems.

{and yes after putting it back, it works ok in the original pc}

I truely am baffled!
 
You still have a couple things to try that I suggested. You would be surprised how many times I've had to remove the motherboard to bend a tab on the I/O plate to stop from going inside a port. And again, a motherboard system speaker should have a series of beeps to let you know what the error is.
 
johnb35 thanks for info

Sorry no speakers in the case, and don't have one to try. Would an earphone work temporarily

1. Motherboard isn't shorting - nothing protruding under it, and is on nylon pillars. Also checked the the metal tabs - ok.
2. Bios needs updating -- curious to know how when it won't boot at all?

Bit reluctant to buy another cpu to find the m/b is faulty.
 
I'd assume BIOS, 5500 was released some time later and required minimum 1.60 on the CPU support list.

I don't believe that board supports CPU-less flashing so you may have to swap in a supported CPU like a 3600 to update the board with.
 
I have (whilst looking for something else) found a pc speaker. I am getting 3 bleeps on power up.
 
3 beeps is referencing memory issue. Try only using 1 stick of ram in each slot and see what happens. Make sure those clips snap in and lock. You could also have totally bad ram but that doesn't happen much.
 
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