I have a computer I built a while back with the following specs
Lan Party T48 Motherboard, Intel 6600 processor, ATI 4870 Graphics card, Soundblaster Sound Card, Western Digital 500GB HD. 8GB G.Skill RAM. Its running Windows 7 Ultimate 64bit. I run AVG Free Anti Virus and Malwarebytes pro
Totay I was playing an online game When I noticed that some of the sounds were not working. I didn't think anything of it and a bit later I noticed No sounds were working. I tried to press ESC to minimize it and restore sound but the computer froze. I waited a bit then Held the power button to do a hard reboot. the system powered up but the monitor didn't show anything. Then 15 seconds later the PC powers off by itself and then repowers back on. Now it sits powered on but no video is being output.
I read somewhere that it could be a powersupply issue but I have no way of knowing what to try to fix. any help with this issue would be appreciated.