PC Won't Turn On

My Windows 7 is acting weird today, it automatically shutdown while I am watching movie and it wont turn on when I tried to turn it on.

After re-seating the RAM it worked but during start up it turned off again. I turned it on again to no avail. So I re-seated the RAM again, it turned on until I finished on movie and I decided to turn it off, however this morning it won't turn on again and I'm now feeling that this take another re-seating to fix it.

I am now checking the hardware hoping to see any visible culprit.

Will be posting here for any development.

Any suggestion is highly appreciated.