hello everyone, i am new to techspot or any forum as far as that goes, anyway, the problem i have is with a couple of year old emachines t6420, when i push the power button, the fans start running and thats all it does, if i turn power off by holding the button and restart it, it usually comes on and boots fine. i replaced the psu with a new one, (500w, i also have a video card i would like to install if i fix this problem), but that did not fix it. also, once i do get it running fine, the display flickers alot, which i can sort of fix by adjusting the refresh rate down. i have noticed on this forum and others i have read that this seems like a common issue with emachines pc's. if anyone could help it would be greatly appreciated and i could start growing the hair back that i have been pulling out. thanks.