Just opened it up hour ago & unplug it all then plugged everythink back in still nothing, no beeps or anythink, everythink seems it be working (harddrive, disk drives... )

Its a advent 3480A P4

One thing i did spot tho there is a little red light between the CPU & ram on the motherboard that is just on & the harddrive light on the front of tower doesnt flash what so ever

Im trying to see allday if any of my mates can lend me there P4 for 5mins so i could try but no luck there