Hello, I have an HP Computer with an MSI 7778 Motherboard. 24 pin slot, separate 4 pin pwr slot up by CPU.
I am trying to replace the power supply with a Logisys PS550E12 that has a 20 pin plug that has the 4 pin that can attach to the side.
I attached everything-I tried the plug with all 24 pins. It powers up, fans spin. But no beeps, no video.
I tried plugging in the 20 pin portion and plugging the 4 pin into the 4 pin socket nothing.
Where am I going wrong?
Did you also plug the separate 4pin (not 4 on the side of the 20) cpu
power plug in? There should be a 4 pin socket close to the cpu, it
has to be plugged in as well, it powers the cpu. The 20 or 20+4
pin powers the rest of the motherboard.