Hi A strange sound has just started coming from my pc which seems to be coming from the PSU. I think its on the way out as its only 250W rated and 4 years old! Ive been reading about requiring 400W for safety and see that Thermaltake and Enermax are good makes. However, are there any other things to look for before buying? I have an ATX motherboard Tabor 3 i think.
Best thing is unwrap it, make sure that nothing rattles inside it, all wires are properly fixed inside their plastic houses etc. This is just for precautions, you should do it with any new purchase. Fit it in the case. Make sure it is the right way up. You wont get it wrong as the top left? screw is stepped inwards. Screw it hand tight so it doesn't move.
Make sure the mains lead is not even connected into the back of it.
Then work out the most efficient way of connecting up all the components in your pc.
There will be two main wires that come out which will allow connection to 2 dvd/ hard drive type connectors and 1 floppy . This is the same for the other wire. Ideally you want the same amount of components connected to each one so they aren't overloaded.
If your using a pentium 4 board there will be an extra 2 x 2 (4 pin) connector for the main board (you want to connect this as it is a 12 volt lead). as well as the normal long connector. Connect these in last after you have connected everything else up, so no static, or surges may go into the mobo.
Make sure that no wires are covering up the inside fan hole that points to the mobo as the power unit will get very hot and spoil air flow. Just make sure you use cable ties to keep the wire layout neat and tidy but dont make the cable ties to tight.