even make an educated guess.
How big (in watts) is the PSU ? What make and model is it ?
What else is in the system.
i just put in a new motherboard and a Pentium D into my computer. I try to start it and all it does is nothing, the fans start, the HDD led is light and so is the led for cd and floppy drive. i think it could have something to do with the powersupply but i am not sure. can anyone help please