sebjlan Posted June 21, 2009 Share Posted June 21, 2009 Hi I put together my new system a few days ago with a TX750 PSU. It ran fine and everything the first day but now when I hit the power button it turns on for about a second, then it shuts down and then without me hitting the power button again it turns on again and boots up normally with 1 beep indicating that everything is okay. Sometimes it turns on for about 1 second and then shuts down twice before booting correctly. Could this be an indication of a bad PSU? I tried attaching a zipped video of it but it keeps failing. Thanks in advance Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted June 22, 2009 Corsair Employees Share Posted June 22, 2009 Shutting down once before a full boot is a normal behavior on a lot of the Intel chipset based motherboards. You can easily test a power supply for functionality with a simple paperclip. First, disconnect all the cables from your motherboard and other devices, but leave the power supply plugged into the wall. Next, bend the paperclip until you have a U shape. Find the 24-pin ATX connector and plug one part of the paperclip into the socket where the green wire ends, and the other end into the socket where a black wire ends. Make sure the power switch on the back of the PSU is on, (should be the I symbol) and the fan should spin up. If it does spin up and stays on; then your PSU is most likely fine. Link to comment Share on other sites More sharing options...
sebjlan Posted June 22, 2009 Author Share Posted June 22, 2009 I tried the paperclip test and my PSU stayed on. I also heard from a friend of mine that his PC behaves similarly so I guess my PSU is fine. I also tested the 5V and 12V rails on a multimeter and the readings were fine. The reason I was worried is that I've never seen nor heard of it before. So I'm curious to find out if it is only common on newer Intel chipset based motherboards? Do you happen to have a (brief) explanation of this behavior or perhaps a link to somewhere I can read about it? Thank you :): Link to comment Share on other sites More sharing options...
Yellowbeard Posted June 23, 2009 Share Posted June 23, 2009 On older Intel chipsets this restart was related to chipset straps. Are you running OCed or stock? Link to comment Share on other sites More sharing options...
sebjlan Posted June 24, 2009 Author Share Posted June 24, 2009 I'm running stock but it also happens if I OC. I have Intel X58 chipset. Link to comment Share on other sites More sharing options...
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