Q: i have bought a thermaltake Dr Power PSU tester it has a set of 7 LED - 5v 5v 3.3v -12v PG 12v 5VSB the only LED that lights up is........ 5VSB there are also 2 other LED marked 5V and 12V that are also unlit can anyone tell me what this says about the PSU as it did not come with any instructions link to psu tester http://cgi.ebay.co.uk/ThermalTake-A2358-Dr-Power-PSU-Tester-New-to-UK_W0QQitemZ310072953711QQihZ021QQcategoryZ3670QQssPageNameZWDVWQQrdZ1QQcmdZViewItem one end of the tester unit is to plug in the 20 pin plug the other has plugs for molex......sata.........p4......floppy do these need to be connected too to test the unit sorry if i sound like i am an amateur but with the pc being 7 years old putting it into a shop to get it fixed would be uneconomic the psu has been removed from the pc to test
A: I have a PSU tester too but whilst of a different make & model I can say that on mine if you plug in the PSU's motherboard plug all my lights light up if the power supply is good. If the only LED lit is the 5VSB then it looks like your 12V rail is fried. HTH