I recently added 512 to 256 megs of ram into my clone P3 along with a secondary hdd. the pc booted but I’ve never recoverd the monitor the hdd spins and all the component led’s light up but no monitor. I’ve tried everything from new power supply to new cables, along with all the checking and rechecking of connections ect… also tried a new prossesor. Is the mother board shot? The monitor is working fine on another system, tried working vid. cards any sugestions other than new tower?