Question H110M-s2h mobo - problem with sleep mode.

[avz3]

I have a desktop with a Gigabyte H110M s2-h motherboard. it's all well but there is an issue that when I put it into "sleep" mode, it indeed goes into sleep but a minute or two (I haven't measured accurately) it wake up by itself. the os is windows10.
is there a way to correct it?

 

[Lutfij]

Make and model of your PSU and it's age? BIOS version for your motherboard at this moment of time? You might want to use KeyboardTester and see if your keyboard might be encountering a key press to bring the system out of sleep.

 

[avz3]

Make and model of your PSU and it's age? BIOS version for your motherboard at this moment of time? You might want to use KeyboardTester and see if your keyboard might be encountering a key press to bring the system out of sleep.

The psu is rated 500W, age unknown. let me add that I've had it worked fine with the previous 120GB Sandisk ssd. I've replaced it with a new Sandisk 240GB ssd with the same windows version and now I'm having this issue. BIOS version is F25 (haven't touched or upgraded it). as I mentioned earlier - it worked well with the previous ssd. pressing any key on the keyboard or clicking the left mouse button, wakes it up.