Quote: Originally Posted by TVeblen
When you disconnected everything down to the CPU you get a beep code. This is most likely a "no RAM detected" error code.
Now you install the RAM and it won't boot (no activity, no beeping).
This indicates that the problem is the RAM. It could be a failed stick, or it could be a failed slot. If you replaced the motherboard then that would pretty much eliminate the bad slot (still a theoretical possibility but pretty damned small!). So your diagnostic work so far indicates a bad stick of RAM.
Try running on just one stick of RAM. Then switch it out for the next stick. Do all the sticks one at a time.
When you get a beep code with only the processor installed it indicates the processor is good. You would not get the "no RAM" beep code if there was a problem with the processor.
EDIT: Obviously, your "My System Specs" are not for the problem PC. Might be helpful to know what the major components are in the problem PC should further diagnoses be necessary.
As said, its a Presario S4490UK.
P4 2.8 HT processor.
Mobo is an Asus P4SD-LA. Cant provide Bios at the moment.
Two IDE HDD, and one IDE dvd Drive.
Original GPU back in at the moment of an ATI 9200.
Original PSU installed, but a replacement has been tried.
Replacement GPU tried, no change.
Stripped to a bare board of PSU, CPU & Ram, no change !
Two sticks of DDR ram. Tried with each one in turn with no change
Totally stuck now !