Question lenovo ideacentre a300 random starts

Miroslav Milosevic

Honorable
Aug 14, 2015
15
0
10,510
Hello. I have problem with A300 ideacenter(I3 first gen,4gb ram,500gb hdd,intel gpu). At first I replaced adapter but after couple of days problem returns.
It starts when it wants. I can press start button 1000 and nothing happens. When PC decides to start (i dont press anything just plug adapter in it and pc starts) it runs fine.
I replaced CMOS battery,did strestesting no overheathing problem,tested ram,hdd,gpu,cpu............ I have 4 working adapters so i ruled out that.
Any idea? checked mb visualy and everything looks fine.