With a brand new Power Supply, with 500 real Watts:
My system components are:
- Motherboard Intel Desktop D865perl (with NO integrated graphics)
- Pentium 4 3.2GHz/800MHz/1MB
- Video card GeForce FX5200
- 4 RAM modules (DDR400 512Mb each)
- 500W PSU
- 80Gb HDD (IDE)
- DVD reader/writer (SONY)
- DVD reader (Toshiba)
The problem is that, now, the PC doesn't boot at all.
I've thought it was a RAM problem, so I've tried one RAM bank at a time.
With the first try, the PC booted up! I then used it for half an hour to check that everything was working with the first 512Mb RAM bank.
But, when I powered it off and tried the other 3 banks, one at a time, the PC did not boot up, with none of them!
Incredibly, it did not boot up even when I tried again with the first bank of RAM!
The PC does not complete the POST, in fact, no beep is emitted (even without RAM modules) and the monitor keeps displaying the "No Signal" message.
The curious point is that, before, this PC has booted and worked with all the 4 RAM banks installed (which performed well in a previous Memtest I've practiced to them).
Do you know what could have happened?
Maybe the BIOS RAM timings were reset in some moment, causing the malfunction?...
Maybe it's a MOBO issue? (its power LED turns on)
I guess the other components work well, since the PC, before, worked for long periods of times.