Question PC won't fully shut down after 5+ hours of use.

[DeadWilds]

I have a really peculiar problem.
My PC won't fully shut down after longer use. Monitor shuts down, peripherals go out, but the CPU, GPU and case fans and lights don't turn off. Tried turning off fast start up, hibernation it doesn't work.

Specs
Intel Core i5-11400F
Gigabyte H470M-H
16GB DDR4 3200MHz Kingston Fury Beast
500GB Kingston NV2 NVMe Gen4
RX 6650XT 8GB

 

[Ralston18]

PSU: make, model, wattage, age, condition (original to build, new, refurbished, used)?

History of heavy use for gamigng, video editing, or even bit-mining?

= = = =

Power down, unplug, open the case.

Clean out dust and debris,

Verify by sight and feel that all connectors, cards, RAM, jumpers, and case connections are fully and firmly in place.

Use a bright flashlight to inspect everywhere for signs of damage,

 

[DeadWilds]

PSU: make, model, wattage, age, condition (original to build, new, refurbished, used)?

History of heavy use for gamigng, video editing, or even bit-mining?

= = = =

Power down, unplug, open the case.

Clean out dust and debris,

Verify by sight and feel that all connectors, cards, RAM, jumpers, and case connections are fully and firmly in place.

Use a bright flashlight to inspect everywhere for signs of damage,

PSU: Asus TUF Gaming 750W Bronze
The PC is new, 3-4 months old. No heavy use.

Why does it only happen after longer use ? It's hard to diagnose, PC runs perfectly other than that.

 

[Ralston18]

When, if ever, does the system finally shutdown after 5+ hours....?

About all that I can think of, and there may be other ideas, is that the heat is involved.

Something gets hot, expands, and then connectivity remains physically intact despite switches being open etc..

However, more information is necessary to determine if heat is involved. I have no vested interest either way...

Especially because, sooner or later, the PC would cool down and return to normal/shutdown.

= = = =

Next time the system is booted look in Reliability History/Monitor and Event Viewer.

The objective being to discover what the system was doing or trying to do prior to any shutdowns. Or trying to do when the system was being shut down.

For example, the system may have been trying to finish up some update that got hung up and never could and never can finish.

Look for error codes, warnings, and even informational events in Reliability History and Event Viewer.

Start with Reliabilty History: much more end user friendly and the timeline format can be revealing - some pattern of events perhaps.

Event Viewer requires more time and effort to navigate and understand.

To help:

How To - How to use Windows 10 Event Viewer | Tom's Hardware Forum (tomshardware.com)

Another possibility is some process running in the background that prevents the PC from shutting down.

Look for that process also. Perhaps trying to update, backup, or simply "phone home".