Question System not waking from sleep (hardware issue)

[Sleepy_Joe]

My elderly Acer Aspire desktop has stopped waking from a sleep.

Acer Aspire M3910 Tower Intel® Core™ i3 i3-550 4 GB DDR3-SDRAM
M57 motherboard.
Win10 (has been flattened and reinstalled since the issue started)

This has worked perfectly well for years and now suddenly will refuse to wake from a sleep.
If you let it sleep, it will not wake on keyboard/mouse activity nor on a press of the power button.

Oddly, you cannot hard boot it. Once it has gone to sleep, there is no way to wake it.
The only way to restart it is to pull the power cable, press and hold the power button, wave a dead chicken in the air, insert power cable and press the power button.
This isn't guaranteed, either - you may have to try this a couple of times.

My gut is saying motherboard or PSU issue.

Thanks.

 

[Ralston18]

Update your post to include full system hardware specs and OS information.

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

Disk drive(s): make, model, capacity, how full?

At the next sucessful boot look in Reliability History/Manager. Reliability History may be capturing some error codes, warnings, or even informational events when the desktop fails to re-awaken.

 

[Sleepy_Joe]

Acer Aspire M3910
Intel® Core™ i3 i3-550 3.2GHz
4 GB DDR3-SDRAM
M57 motherboard
Windows 10 (always updated) This issue has been going 12 months, through all the various updates

All as supplied by Acer in 2011 with only the following upgrades:
Samsung 250GB SSD (half full)
AMD Radeon HD 6450 1gb Gddr3 PCIe X16 Low Profile

PSU is the original unit from Acer: a Delta dps-250AB-22e

Reliability History shows no critical events
I also checked Event Manager at the time of failure to wake and it showed no critical events at all. I get the impression (though this might not be correct) that it correctly goes to sleep, writing hiberfil.sys to the drive. It fails to wake on any action, but when I do pull/reinsert the power cable and get it to powerup, it does a correct wake from Sleep and continues without any error being recorded.

 

[Sleepy_Joe]

No-one got any thoughts?