CPU or Motherboard Problem?

[Superglitch]

Hi all, 

 

Firstly here's the specs:

MSI MAG B650 Tomahawk

Ryzen 5 7600

32 GB DDR5 Corsair Vengeance 6000Mhz (2 X 16GB)

Verbatim 2TB M.2 2280 PCIe SSD

Radeon RX 7900 GRE

MSI MAG A750GL PSU

 

Recently splashed out and built a new gaming PC. However I've run into a catastrophic problem. After getting a successful post and installing windows last night, I did a quick restart to change some bios settings and the PC then failed to post and hasn't posted since. Everything turns on, fans spinning, GPU RGB etc.

 

Opening the case the motherboard has its EZ Debug light on for the CPU. once powered on even holding the PC power button down for any length of time won't turn off the PC. If I take the CPU out and power on, the same debug light remains on but if I press the PC power button the machine instantly powers down. I should also mention that mouse and keyboard wouldn't turn on either at this stage and are connected to motherboard USBs.

 

Basically I'm trying to ascertain if it's the motherboard or the CPU. Any help would be massively appreciated

 

Cheers!

[kitnoman]

That sounds like a motherboard issue. But would also check if it might be ram. If I would troubleshoot it, the first thing I would do is to reset CMOS and only try to one ram. If it still does not post, then I would reseat the CPU and in the process check for bent pins on the motherboard. I would even try to boot it while the heatsink is still removed, just to check if the CPU would even get warm or hot. If it does heat up, I would install the heatsink, making sure that it's only finger tighten. It The CPU isn't heating up and remains cold, despite the pc being on and there's no post. That's the time you either need an extra CPU and motherboard to check.

Throughout the years I've encounter weird issues that I still can't explain. Just like what happen to you, my pc won't boot. Did everything, the CPU does not heat up. Tried to reseat the cpu and checked the pins. Disassemble everything and put it back one by one and still nothing. Updated the  bios, still nothing. lol what fixed it was using another CPU from a friend. Didn't even change anything, after it boot successfully, I replaced and inserted my CPU and everything works like nothing happened.

[OddOod]

If reseating the CPU doesn't fix it, you have a dead mobo. RMA

[PDifolco]

4 hours ago, Superglitch said:

Hi all, 

 

Firstly here's the specs:

MSI MAG B650 Tomahawk

Ryzen 5 7600

32 GB DDR5 Corsair Vengeance 6000Mhz (2 X 16GB)

Verbatim 2TB M.2 2280 PCIe SSD

Radeon RX 7900 GRE

MSI MAG A750GL PSU

 

Recently splashed out and built a new gaming PC. However I've run into a catastrophic problem. After getting a successful post and installing windows last night, I did a quick restart to change some bios settings and the PC then failed to post and hasn't posted since. Everything turns on, fans spinning, GPU RGB etc.

 

Opening the case the motherboard has its EZ Debug light on for the CPU. once powered on even holding the PC power button down for any length of time won't turn off the PC. If I take the CPU out and power on, the same debug light remains on but if I press the PC power button the machine instantly powers down. I should also mention that mouse and keyboard wouldn't turn on either at this stage and are connected to motherboard USBs.

 

Basically I'm trying to ascertain if it's the motherboard or the CPU. Any help would be massively appreciated

 

Cheers!

If it worked then don't after fiddling in BIOS just reset the CMOS battery 

[Superglitch]

2 hours ago, PDifolco said:

If it worked then don't after fiddling in BIOS just reset the CMOS battery 

 

Unfortunately didn't get that far, restarted to get into the BIOS and that's when everything went wrong haha.

[Superglitch]

4 hours ago, OddOod said:

If reseating the CPU doesn't fix it, you have a dead mobo. RMA

Reseated the CPU with heatsink removed to see if it warmed up at all and still had the same issue and CPU was cold to touch. Would that still be motherboard?

[Superglitch]

5 hours ago, kitnoman said:

That sounds like a motherboard issue. But would also check if it might be ram. If I would troubleshoot it, the first thing I would do is to reset CMOS and only try to one ram. If it still does not post, then I would reseat the CPU and in the process check for bent pins on the motherboard. I would even try to boot it while the heatsink is still removed, just to check if the CPU would even get warm or hot. If it does heat up, I would install the heatsink, making sure that it's only finger tighten. It The CPU isn't heating up and remains cold, despite the pc being on and there's no post. That's the time you either need an extra CPU and motherboard to check.

Throughout the years I've encounter weird issues that I still can't explain. Just like what happen to you, my pc won't boot. Did everything, the CPU does not heat up. Tried to reseat the cpu and checked the pins. Disassemble everything and put it back one by one and still nothing. Updated the  bios, still nothing. lol what fixed it was using another CPU from a friend. Didn't even change anything, after it boot successfully, I replaced and inserted my CPU and everything works like nothing happened.

 

So I reseated the CPU and powered everything on without a heatsink to see if it got warm to the touch. Unfortunately it stayed cold. I don't have access to another AM5 board or CPU to test out

[OddOod]

1 hour ago, Superglitch said:

Reseated the CPU with heatsink removed to see if it warmed up at all and still had the same issue and CPU was cold to touch. Would that still be motherboard?

yes

 

[Superglitch]

1 hour ago, OddOod said:

yes

 

Thank you, organised a replacement from Amazon at no cost and just have to ship the fault board back to them.

[Superglitch]

21 hours ago, OddOod said:

yes

 

 

Also think I may have found the culprit...

[OddOod]

Not sure what I'm seeing here. Did you short it on a standoff?

[Superglitch]

52 minutes ago, OddOod said:

Not sure what I'm seeing here. Did you short it on a standoff?

 

Just below the standoff, motherboard seems to be damaged. Only visible damage I could find on the board (although is minimal).

[OddOod]

Oh dip! Yeah, that'll do it. Strong work on finding it!