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. 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 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. Can't find your answer ? Ask ! Publish Related resources: ForumComputer was turning on for a split second and then turned off but now it won't ForumPC dead after PSU overheats, now only turns on for split second ForumComputer will turn on for a split second then off . )'= ForumMy comp turned off by itself & now it won't turn back on ForumComputer turns on for a split second then shuts off ForumComputer starts for a sec , then turns off , then finally boots up . ForumPlease help -- System powers up for split second and turns off ForumComputer turns on for a split second then shuts off ForumNew computer turned off by itself and now won't turn back on :( ForumInstalled new graphics card now both the new and the old one wont detect ForumComputer turns on for 1 second then shuts off ForumComputer won't recognize sata hard drive anymore ForumCpu heatsink fell off ... computer wont turn on now ForumComputer turned itself off and wont load back up ForumCPU Temps More resources Read discussions in other Systems categories Homebuilt New Build Prebuilt Cases Power Supplies RAM CyberPower !