Question Troubleshooting - does this sound like I need a new motherboard?

[catlicor]

After working fine for 6 months, my computer won't start up after doing a Windows update. When I power up the computer, the fans start spinning, the motherboard LED lights up, the CPU fan lights up, the memory sticks light up, but I get no beeps and nothing appears on the monitor. No BIOS screen comes up either. Initially I figured it was problem with graphics card, but I tested the graphics card in a different computer and that worked, plus I tried a different card in the problem PC and that also didn't work. Since the motherboard is lighting up, I'm guessing the power is going though ok. I tried removing the memory and re-seating which also didn't help.

So I'm guessing the motherboard just went bad and needs to be replaced?... but I'm just a novice PC builder so looking for any other suggestions/advice. Thanks.

Below are the items in the PC. Was running Windows 10.

Component		Selection	Price
CPU		AMD Ryzen 9 5900X 3.7 GHz 12-Core Processor	$399.00	Buy
CPU Cooler		Cooler Master Hyper 212 RGB Black Edition 57.3 CFM CPU Cooler	$52.98	Buy
Motherboard		Asus TUF GAMING B550M-PLUS (WI-FI) Micro ATX AM4 Motherboard	No PricesAvailable	Buy
Memory		OLOy WarHawk RGB 32 GB (2 x 16 GB) DDR4-3600 CL18 Memory	No PricesAvailable	Buy
Storage		ADATA XPG GAMMIX S11 Pro 1 TB M.2-2280 NVME Solid State Drive	$97.99	Buy
Video Card		MSI Radeon RX 5500 XT 8 GB MECH OC Video Card	No PricesAvailable	Buy
Case		Montech Flyer White MicroATX Mid Tower Case	No PricesAvailable	Buy
Power Supply		SeaSonic FOCUS Gold 550 W 80+ Gold Certified Semi-modular ATX Power Supply

 

[Lutfij]

Seems to me like the board might be suffering from a corrupt BIOS. According to the motherboard manual, here, look at the Asus CrashFree BIOS option and see if you can reflash the BIOS using a pen drive, as stated in page 2-4, section 2.4.

The PSU looks capable of powering the entire build but it's a good idea to source a donor PSU(not purchase) from your friend or neighbor who owns a reliably built 650W unit.