Question PC randomly powered down frequently

Jul 4, 2019
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I've had this issue on and off for at least a year, but nothing in the past few months. In the last ~5 days my PC has started powering off. I have also noticed that it is waking from sleep (sometimes in the middle of the night) and not shutting down properly (monitor, keyboard and mouse are off. System fan stay spinning).

It's not under load, this morning i'm only working with a number of Chrome and Firefox tabs open and it has done it twice. To get it to power up I have to switch off the PSU using the toggle switch, waiting ~20 secs and then power on and boot up.

I've ran HWinfo64bit as I saw mentioned on another thread but I can't obviously see an issues.

Event viewer has lots of these events
The IO operation at logical block address 0x7124b8 for Disk 0 (PDO name: \Device\0000002a) was retried.
Event ID 153


Any help much appreciated. It's my own build that has gradually been improved over the years but it could be the mobo / cpu is finally dying? Let me know what system info is needed to be provided for better diagnosis.


Computer: GIGABYTE
CPU: AMD FX-6300 (Piledriver/Vishera, OR-C0 (Orochi))
3500 MHz (17.50x200.0) @ 1406 MHz (7.00x200.9)
Motherboard: GIGABYTE 970A-DS3
BIOS: FD, 01/23/2013
Chipset: AMD 970 (RX980) + SB920/SB950
Memory: 16384 MBytes @ 803 MHz, 11-11-11-28
- 4096 MB PC12800 DDR3 SDRAM - G Skill F3-12800CL9-4GBXL
- 4096 MB PC12800 DDR3 SDRAM - G Skill F3-12800CL9-4GBXL
- 4096 MB PC12800 DDR3 SDRAM - G Skill F3-12800CL9-4GBXL
- 4096 MB PC12800 DDR3 SDRAM - G Skill F3-12800CL9-4GBXL
Graphics: NVIDIA GeForce GTX 1060 6GB (GP106-400) [DELL]
NVIDIA GeForce GTX 1060 6GB, 6144 MB GDDR5 SDRAM
Drive: Samsung SSD 840 Series, 117.2 GB, Serial ATA 6Gb/s @ 6Gb/s
Drive: ST3000DM008-2DM166, 2930.3 GB, Serial ATA 6Gb/s @ 6Gb/s
Sound: ATI/AMD SB800/Hudson-1 - High Definition Audio Controller
Sound: NVIDIA GP106 - High Definition Audio Controller
Network: Atheros AR938x Wireless Network Adapter
Network: RealTek Semiconductor RTL8168/8111 PCI-E Gigabit Ethernet NIC
OS: Microsoft Windows 10 Professional (x64) Build 17134.829 (1803/RS4)
 
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Jul 4, 2019
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I've had it happen again this afternoon. No changes to PC. Not under load. I was running the monitor from HWInfo at the time and there is no obvious changes in the values that I understand.

I've noticed that one of my power leads in the shared powerblock is frayed - possibly a short causing the the PC to power off?

My mobo is getting on, probably 5+ years - how would i know if that's causing the issue?
 
Jul 2, 2019
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This sounds like either an overheating issue or a PSU failing. I would check your temps under load, check all fans are working, clean internals etc. If temps look good it may be time for a new PSU.

Let's see what others suggest. Good luck!
 
Jul 4, 2019
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@Quanticriver no OC, but good thought. I've looked at OC before but for this reason never went for it.

I'll check out the PSU. It's much newer than the rest of the PC as I bought a newer, more powerful one when I upgraded the GFX card. Fans and temps all seemed OK on the HWInfo logs but i'll double check
 
Jul 4, 2019
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Happened a few more times last night. I pulled open the case and had a proper look, and realised the CPU heatsink was crammed full of dust! I used the last of my air duster to clear it out and the idle temp of the CPU has dropped to ~20 - 30C