Installed New PSU and no boot

[htid]

Hi,

My girlfriend's father's PSU started making a loud noise so he decided to get a new one and asked me to install it. I built my PC a few years ago and am quite confident in fitting a new PSU, however I've done it and now it won't boot or even act as though there's any connection to the screen (is that "posting"?) Here is the motherboard.

His boot HD is sata and he has a backup, also sata. The problem is, on the previous PSU there was a 4 pin motherboard connector which looked like this http://www.techaddicts.net/reviews/gp550/gp550.10.jpg along with the 20 pin connector. The new PSU has a 20 pin connector and a 4 pin one, however the 4 pin one has a different configuration to the previous one. Rather than it being 'house' 'square' (i.e the shape of the individual connectors on the top row..hope this makes sense!) it's vice versa, and same on the bottom. The connection on the motherboard does have 24 holes, which means I can put the 20 pin and the new 4 pin all in and it fits, but then it just won't boot and obviously the socket on the motherboard that the previous PSUs 4 pin connector was in, is empty.

The other problem is that 2 PATA DVD drives won't open. I assume that even if the motherboard isn't powered fully, the DVD tray should still open right?? It's just direct power from the PSU to the DVD drive.

Any ideas, as he really needs it working today because he's going away tomorrow and needs to print some stuff off from the hard drive. Thanks!

[Tattysnuc]

What power supply are you trying to use? ATX 2.0 and onwards PSU's have 2 of the 4 pin connectors that you mention, one being the mirror of the other. Are you sure its an atx 2.0+ psu and not just the additional 4 pins to make a 24 pin atx power lead? ie are you trying to put the 4 pins that are supposed to be part of the 24 pin ATX connector into the cpu socket?

Apologies if I've got it wrong...

[htid]

What power supply are you trying to use? ATX 2.0 and onwards PSU's have 2 of the 4 pin connectors that you mention, one being the mirror of the other. Are you sure its an atx 2.0+ psu and not just the additional 4 pins to make a 24 pin atx power lead? ie are you trying to put the 4 pins that are supposed to be part of the 24 pin ATX connector into the cpu socket?

Apologies if I've got it wrong...

It's this PSU. I don't really know anything about atx and what the 24 pin connector means as opposed to the 20 pin one, the only thing I can say is that previously the PSU had a single 4 pin connector and a single 20 pin connector. If you look at the PDF of the motherboard I linked to in my first post, the 20 pin connector was (obviously) in the BTX1 socket and the 4 pin in the JPWR1 (bottom right of the diagram). The new PSU has a 20 pin connector which goes into BTX1 but the 4 pin connector will only fit in the 4 holes which are left in the 24 pin socket of BTX1, leaving the formerly connected JPWR1 empty. Is there an adapter you can buy to mirror the one he has to the one he had previously?

Cheers

[Tattysnuc]

It's this PSU. I don't really know anything about atx and what the 24 pin connector means as opposed to the 20 pin one, the only thing I can say is that previously the PSU had a single 4 pin connector and a single 20 pin connector. If you look at the PDF of the motherboard I linked to in my first post, the 20 pin connector was (obviously) in the BTX1 socket and the 4 pin in the JPWR1 (bottom right of the diagram). The new PSU has a 20 pin connector which goes into BTX1 but the 4 pin connector will only fit in the 4 holes which are left in the 24 pin socket of BTX1, leaving the formerly connected JPWR1 empty. Is there an adapter you can buy to mirror the one he has to the one he had previously?

Cheers

You need to plug in half of the "4+4-Pin Mainboard 12V (8-Pin EPS) 1x 50cm" into the socket by the CPU. On all the PSU's I've seen, the 8 pin splits into 2 4 pins, one of which will plug into the socket by the CPU.

[htid]

You need to plug in half of the "4+4-Pin Mainboard 12V (8-Pin EPS) 1x 50cm" into the socket by the CPU. On all the PSU's I've seen, the 8 pin splits into 2 4 pins, one of which will plug into the socket by the CPU.

Thanks a lot that works perfectly

[Tattysnuc]

Yay! Nice one!