New build cycles on and off Tags: New Build CPUs New Build Systems Last response: September 12, 2011 12:07 AM in Systems Share alhounos September 3, 2011 3:51:26 AM I'm breadboard testing my new build. Gigabyte GA-Z68MA-D2H-B3 Intel 2500k Kingston HyperX 12800 cheap Xion 450w case/PSU With CPU/HSF and RAM installed, it only powers up for a second (CPU and PSU fans start spinning), no POST, and shuts down. It cycles on again a couple seconds later, and shuts down again. With only CPU/HSF installed, I get repeating long beeps for about 20 secs and then power down. After 5 secs, it tries again. Ideas? More about : build cycles rvilkman a b à CPUs September 3, 2011 6:02:41 PM Check out this post: Troubleshooting post on the forum. It will most likely list every issue you might run into. I would recommend clearing CMOS first, just to make sure it doesn't have some odd settings on it. Second make sure you have the CPU power connected ( 8 pin connector ). Obviously the PSU can be crap and faulty, so if you have a 2nd one to try with that would be nice. Overall though the link has all that listed, so hopefully you will be able to determine your problem. alhounos September 4, 2011 10:34:53 PM yeah, i've gone through that thread. cleared the cmos, and the cpu power is ok. The odd thing is it still cycles on/off without memory installed, but it does have time to POST, which it doesn't when memory is installed. I guess I'll just have to bite the bullet and order a new case/PSU. Thanks for your help. Related resources New Build Does't Post. Power cycles on and off . - Forum MSI P67A GD65 power cycles on and off - Forum P5K Deluxe will not post just cycles on and off - Forum System cycles on and off but will not post - Forum Troubleshooting post on the forum. - Forum Can't find your answer ? Ask ! Get the answer jsc a c 172 à CPUs September 5, 2011 8:47:26 AM System will not successfully POST (single short beep) without good memory installed. cgleckman September 5, 2011 8:56:01 AM alhounos said:yeah, i've gone through that thread. cleared the cmos, and the cpu power is ok. The odd thing is it still cycles on/off without memory installed, but it does have time to POST, which it doesn't when memory is installed. I guess I'll just have to bite the bullet and order a new case/PSU. Thanks for your help. alot of mobos will flash red when u turn it on (look near the ram).. if it doesnt go green it means the rams not reading right and does not mean your psu is bad.. why would the case make a difference? also do you have a GPU installed? If so which 1? 430W PSU could be the problem if you have a GPU alhounos September 12, 2011 12:07:34 AM thanks guys, but the problem turned out to be the motherboard. sent it back and the replacement works. However, it only boots into linux with my SSD. windows 7 refuses to boot. but that may be another thread. Can't find your answer ? Ask ! Publish Related resources: ForumNew Build Power Cycles ForumNo post, power cycles on its own ForumNew power supply and video card computer cycles off and ForumGigabyte's P35 motherboards and boot cycles Forumpower cycles before booting like normal ForumNew Build Power Cycling? ForumPower Cycles , Will not post ForumNew build GA-Z77X-D3H with i5-3570k turns on and off ForumCpu/Gpu/Motherboard Suggestion ForumThis is my first build. Please Help ForumStudio XPS 9100 vs custom build? ForumPlease Rate My Build! ForumPlanning to build a PC Forum[Solved] Review my build buying this weekend ForumMy current build - Thoughts? More resources Read discussions in other Systems categories Homebuilt New Build Prebuilt Cases Power Supplies RAM CyberPower !