I have a custom built system that needed a power supply replacement. I replaced a 450W PS with a new 400W. Now with the new power supply installed when I simply plug it into the motherboard (using the 20 pin power connector and the four pin power connector) the system will go to POST. However if I plug anything else in (HDD, CDROM...) the motherboard gets power for a second then all the fans in the power supply and the CPU fan will stop. The board still has power going to it as I can see from the LED light on the board but the system will not power up with everything plugged in. Is it that the PS is not powerful enough maybe?
Why is this? Any suggestions please.
Why is this? Any suggestions please.