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EZ Debug CPU LED on - PC doesn't start anymore

Go to solution Solved by Analog,
11 minutes ago, Grrump said:

Hi folks,

 

today my trusted PC stopped working. First it would just restart randomly, work for a while only to restart randomly again, like if one had pressed the rest button.

I was able to check if GPU and CPU were fine temperature wise (GPU ~51°C, CPU ~49°C). I also opened the case to check for fan spin.

During a few of the restarts the CPU fan that is connected to the motherboard CPU fan outlet wasn't spinning anymore. The case fans were spinning normally. I cannot recall the exact order as there were too many restarts. 

Eventually it stopped restarting and just didnt't react at all anymore. Instead the white CPU LED on the motherboard turned on and remained solid. 

 

The PC:

Ryzen 7 5800X

MSI Tomahawk X570

 

Corsair Vengeance LPX 16GB (2x8GB) DDR4 4000MHz C18 

MSI GTX 1060

550 Watt PSU from Corsair 

 

The last change  to this system (RAM) was made in early Februar 21 and the CPU/motherboard combination has worked normally since November 20.

Thanks for your help and ideas as to what could be wrong.

 

First thing to do is to check if the 8-pin EPS connector is properly plugged in. If it is fine try do a BIOS flashback with the latest version of the BIOS. If it is already with the latest version, try and downgrade to one version prior. In case your computer is still not starting I would reset the processor. If all this fails, could very well be a dead motherboard. 

Hi folks,

 

today my trusted PC stopped working. First it would just restart randomly, work for a while only to restart randomly again, like if one had pressed the rest button.

I was able to check if GPU and CPU were fine temperature wise (GPU ~51°C, CPU ~49°C). I also opened the case to check for fan spin.

During a few of the restarts the CPU fan that is connected to the motherboard CPU fan outlet wasn't spinning anymore. The case fans were spinning normally. I cannot recall the exact order as there were too many restarts. 

Eventually it stopped restarting and just didnt't react at all anymore. Instead the white CPU LED on the motherboard turned on and remained solid. 

 

The PC:

Ryzen 7 5800X

MSI Tomahawk X570

 

Corsair Vengeance LPX 16GB (2x8GB) DDR4 4000MHz C18 

MSI GTX 1060

550 Watt PSU from Corsair 

 

The last change  to this system (RAM) was made in early Februar 21 and the CPU/motherboard combination has worked normally since November 20.

Thanks for your help and ideas as to what could be wrong.

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11 minutes ago, Grrump said:

Hi folks,

 

today my trusted PC stopped working. First it would just restart randomly, work for a while only to restart randomly again, like if one had pressed the rest button.

I was able to check if GPU and CPU were fine temperature wise (GPU ~51°C, CPU ~49°C). I also opened the case to check for fan spin.

During a few of the restarts the CPU fan that is connected to the motherboard CPU fan outlet wasn't spinning anymore. The case fans were spinning normally. I cannot recall the exact order as there were too many restarts. 

Eventually it stopped restarting and just didnt't react at all anymore. Instead the white CPU LED on the motherboard turned on and remained solid. 

 

The PC:

Ryzen 7 5800X

MSI Tomahawk X570

 

Corsair Vengeance LPX 16GB (2x8GB) DDR4 4000MHz C18 

MSI GTX 1060

550 Watt PSU from Corsair 

 

The last change  to this system (RAM) was made in early Februar 21 and the CPU/motherboard combination has worked normally since November 20.

Thanks for your help and ideas as to what could be wrong.

 

First thing to do is to check if the 8-pin EPS connector is properly plugged in. If it is fine try do a BIOS flashback with the latest version of the BIOS. If it is already with the latest version, try and downgrade to one version prior. In case your computer is still not starting I would reset the processor. If all this fails, could very well be a dead motherboard. 

CPU: AMD Ryzen 9 - 3900x @ 4.4GHz with a Custom Loop | MBO: ASUS Crosshair VI Extreme | RAM: 4x4GB Apacer 2666MHz overclocked to 3933MHz with OCZ Reaper HPC Heatsinks | GPU: PowerColor Red Devil 6900XT | SSDs: Intel 660P 512GB SSD and Intel 660P 1TB SSD | HDD: 2x WD Black 6TB and Seagate Backup Plus 8TB External Drive | PSU: Corsair RM1000i | Case: Cooler Master C700P Black Edition | Build Log: here

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1 hour ago, Analog said:

 

First thing to do is to check if the 8-pin EPS connector is properly plugged in. If it is fine try do a BIOS flashback with the latest version of the BIOS. If it is already with the latest version, try and downgrade to one version prior. In case your computer is still not starting I would reset the processor. If all this fails, could very well be a dead motherboard. 

Thanks a lot for your reply. I reinserted the CPU and the motherboard automatically set the BIOS(?) settings back to standard (had only changed the RAM speed to 4000MHZ in February). It has worked since then..I hope its a stable solution 🙂 

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3 minutes ago, Grrump said:

Thanks a lot for your reply. I reinserted the CPU and the motherboard automatically set the BIOS(?) settings back to standard (had only changed the RAM speed to 4000MHZ in February). It has worked since then..I hope its a stable solution 🙂 

Glad it worked out for you. The processor probably wasn't making very good contact when it was originally installed or somehow managed to wiggle itself out. AMD Ryzen processors with the way they are mounted to the motherboard are not as secure in the socket as the Intel ones. Often times when the CPU cooler is removed the processor actually comes out with the heatsink, even though the retaining arm of the socket is still locked in place.  

CPU: AMD Ryzen 9 - 3900x @ 4.4GHz with a Custom Loop | MBO: ASUS Crosshair VI Extreme | RAM: 4x4GB Apacer 2666MHz overclocked to 3933MHz with OCZ Reaper HPC Heatsinks | GPU: PowerColor Red Devil 6900XT | SSDs: Intel 660P 512GB SSD and Intel 660P 1TB SSD | HDD: 2x WD Black 6TB and Seagate Backup Plus 8TB External Drive | PSU: Corsair RM1000i | Case: Cooler Master C700P Black Edition | Build Log: here

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