Computer was on for split sec, turned off and now won't power up anymore. Tags: Homebuilt Power Up Computers Power Systems Last response: February 28, 2013 12:53 AM in Systems Share HA5ER February 27, 2013 8:25:31 PM I built my gaming PC about a month ago and everything was running pretty good. Today, when I tried to turn on my PC, it came on for a split second and then immediately turned off. I tried pushing the power button again, but this time it wouldn't turn on at all. I made sure all the power cords were connected and my power strip was still receiving power. (Was able to turn on my lamp and TV at the same time on the strip.) I unplugged my computer from the strip, plugged it into different outlet, then reset the power supply. (Flipped the switch to 0 then to 1.) It powered up, but immediately went off again just like it did the first time. Is it the power supply? More about : computer split sec turned power anymore TheN00bBuilder a b B Homebuilt system February 27, 2013 8:27:14 PM What is the power supply? It probably is. m 0 l HA5ER February 27, 2013 8:29:40 PM TheN00bBuilder said:What is the power supply? It probably is. Ultra LSP550 550-Watt Power Supply - ATX, SATA-Ready, SLI-Ready, 135mm Fan I Bought it off of TigerDirect.com m 0 l Can't find your answer ? Ask ! Get the answer TheN00bBuilder a b B Homebuilt system February 28, 2013 12:53:24 AM The power supply isn't completely reliable. Ultra LSP is the budget line of Ultra power supplies. Go for a CX500 or something like that to replace it. m 0 l Can't find your answer ? Ask ! Publish Related resources Computer was turning on for a split second and then turned off but now it won't Forum My laptop turned itself off while I was online as I had run out of power now it wont start up Forum SolvedHelp! When i press the power button the computer only starts for a split second then turns off. Forum Laptop won't start. Power-on lights turn on for 3-4 sec, then off. No beeps and no fan. Forum SolvedComputer powers on for a split second then turns off Forum SolvedComputer starts for a sec, then turns off, then finally boots up. Forum computer was powered off. lightning hit close by now wont turn on Forum SolvedComputer turned itself off, wouldn't power back on, but now working? Forum SolvedAfter dusting out, computer powers on for 5 sec, ten turns of, then on/off repeateadly Forum SolvedBought new computer parts, booted up but turned off, wont turn on again. Forum My computer randomly turned off and now it won't turn back on? Forum My friend held down my power button until my computer turned off and now my USB ports don't work. How would one go about fixin Forum Installed new power supply now computer wont turn off by itself Forum Pc Turns on for a split sec then off again! Forum Computer shuts off and wont boot up anymore Forum SolvedComputer randomly powers off and won't start up untill motherboard completly loses power Forum SolvedNew computer suddenly turns off, won't start back up. Forum SolvedInstalled 'new' power supply now computer turns on and immediately off Forum SolvedMonitor won't turn on (blinks on for a sec and off every 10-15 seconds) Forum SolvedComputer starts, turns off in a split second Forum More resources Read discussions in other Systems categories Homebuilt New Build Prebuilt Cases Power Supplies RAM CyberPower !