Guidance on random restarts with ThinkStation P520 even inside the UEFI.

Hello,

I’m reaching out for assistance with an issue I’ve been facing on my 6-years old ThinkStation P520. The system has been restarting randomly without displaying any BSOD errors. Here’s what I’ve tried so far:

1. RAM Replacement: Swapped my RAM with a module from another system, but the restarts persisted.
2. Motherboard Swap: Temporarily used a motherboard from a friend’s P520, but the restarts continued.
3. UEFI Settings: Left the system in the UEFI interface overnight—it restarted after ~25 minutes without any changes. The same occurred after reverting to my original motherboard.

At this point, I’m unsure what might be causing the problem. Any ideas what could be the issue here? (V2 logs here)

I sincerely hope this isn't an SMPS issue. I have no way of getting a replacement SMPS.

Which websites were used for replacing RAM and swapping the motherboard?

And what were the tests and diagnostic results?

If possible, post links.



Post event viewer share links for each system and application.

You didn't mention the PSU? have you tested the voltage?
If you have spare PSU, try that.

Hi,

I didn't use any websites for replacements. Got those from an acquaintance using another ThinkStation P520.

I ran V2 log collector and the in-built diagnostics show post the boot screen.

• I shared the V2 logs earler (link)
• the in-built diagnostics of power, ram, storage were shown as passed. (Didn't run any advanced diagnostics)

Yeah.. the PSU is what my acquaintance refused to share with me. So I have no way to check that.
I didn't know how to test the PSU for voltage stability. However, when the computer would restart, I would notice that an orange LED would light up alongside the regular green LED. I am told that's an issue too.


Anyways. I gave up on that system... I have reverted to using an old HP Z240 for now.

Today is 10/3/2025.

The V2 posted in post#4 was dated 08/27.

The logs reported BSODs.

If you need help please post a new V2 share link into the newest post.