Hello,
I have this Dell Optiplex 755 Mid-Tower, Win 7 64bit, Core 2 Duo 3.0 ( E6750 chip ) CPU, 4x GB Ram ( PC5200 @ 667mhz, 1x GB chip per slot ).
I upgraded to the Core 2 Duo 3.0 ( E8400 chip ), and 8x GB Ram ( Samsung PC6400U @ 800hrz, 2GB chip per 4x slots ).
I first turned off the Desktop, unplugged all wires from back, opened-up case, removed old Ram Chips and installed new, then removed CPU Heat Sink to remove old CPU, then installed new CPU ( and used CPU Thermal Grease ), and reinstalled Heat Sink. Then installed all cables & wires in back...I left side case open to view any issues during start-up.
So, the problem I have now is that the Mid-Tower turns on, but makes sequential noises...Heat Sink Fan ( Big Black Fan ) turns on for a couple seconds then turns off, then the Vid Card Card turns on ( fan spins ) for a couple seconds then stops. The front lights also keep blinking on and off ( lights on the CD Rom ) several times in sequence. I get no Video through the Monitor ( Monitor light is on ).
I keep uninstalling-reinstalling the CPU & Ram in different order ( ex; New CPU with Old Ram, Old CPU with New Ram, etc, etc ), but still the identical sequential noises arise...I even tried to put back my Old CPU & Old Ram, and still having the same problem. I just turned off the Mid-Tower, and uplugged everything...Figure I try and get help here first before taking it to a computer store.
Any help would be appreciated.
Thanx, Joe
I have this Dell Optiplex 755 Mid-Tower, Win 7 64bit, Core 2 Duo 3.0 ( E6750 chip ) CPU, 4x GB Ram ( PC5200 @ 667mhz, 1x GB chip per slot ).
I upgraded to the Core 2 Duo 3.0 ( E8400 chip ), and 8x GB Ram ( Samsung PC6400U @ 800hrz, 2GB chip per 4x slots ).
I first turned off the Desktop, unplugged all wires from back, opened-up case, removed old Ram Chips and installed new, then removed CPU Heat Sink to remove old CPU, then installed new CPU ( and used CPU Thermal Grease ), and reinstalled Heat Sink. Then installed all cables & wires in back...I left side case open to view any issues during start-up.
So, the problem I have now is that the Mid-Tower turns on, but makes sequential noises...Heat Sink Fan ( Big Black Fan ) turns on for a couple seconds then turns off, then the Vid Card Card turns on ( fan spins ) for a couple seconds then stops. The front lights also keep blinking on and off ( lights on the CD Rom ) several times in sequence. I get no Video through the Monitor ( Monitor light is on ).
I keep uninstalling-reinstalling the CPU & Ram in different order ( ex; New CPU with Old Ram, Old CPU with New Ram, etc, etc ), but still the identical sequential noises arise...I even tried to put back my Old CPU & Old Ram, and still having the same problem. I just turned off the Mid-Tower, and uplugged everything...Figure I try and get help here first before taking it to a computer store.
Any help would be appreciated.
Thanx, Joe