I just finished a build for my friend with a combination of used/new parts. The used parts were working perfectly in another computer just a few days ago so I'm sure they aren't the problem.
When I power on the system, the all of the fans started turning/lights turn on etc, but after 3-4 seconds the computer turns off for a few seconds and the cycle repeats automatically until I manually flip the switch on the back of the PSU. There is also no POST of the system whatsoever with the screen completely blank.
What I tried:
-unplugged the HDD, DVD burner, video card, and ram
-swapped the RAM into different dimms
same thing happened after I tried these. One interesting thing though is after completely removing the RAM the computer took twice as long to restart after being powered on (7-8 sec vs. 3-4).
From these tests I'm pretty sure it's the motherboard (brand new). The powersupply I have had for 2 years with no problems and was powering more demanding components than what it is doing now. I last used it 2 days ago in my other computer and was working perfectly. I doubt it's the CPU because not having a functioning CPU wouldn't cause your computer to constantly reboot ( I have had it happen before).
Here is a list of my specs:
New components
-Intel Core i3 540
-Gigabyte H55M-S2V LGA 1156 motherboard (micro atx)
-one stick of OCZ DDR3-1333 ram (2GB)
-Samsung DVD burner
Used:
-Rosewill 600w powersupply
-XFX 8800GT video card
-WD 320GB SATA hardrive
-Enermax Uber chakra case
When I power on the system, the all of the fans started turning/lights turn on etc, but after 3-4 seconds the computer turns off for a few seconds and the cycle repeats automatically until I manually flip the switch on the back of the PSU. There is also no POST of the system whatsoever with the screen completely blank.
What I tried:
-unplugged the HDD, DVD burner, video card, and ram
-swapped the RAM into different dimms
same thing happened after I tried these. One interesting thing though is after completely removing the RAM the computer took twice as long to restart after being powered on (7-8 sec vs. 3-4).
From these tests I'm pretty sure it's the motherboard (brand new). The powersupply I have had for 2 years with no problems and was powering more demanding components than what it is doing now. I last used it 2 days ago in my other computer and was working perfectly. I doubt it's the CPU because not having a functioning CPU wouldn't cause your computer to constantly reboot ( I have had it happen before).
Here is a list of my specs:
New components
-Intel Core i3 540
-Gigabyte H55M-S2V LGA 1156 motherboard (micro atx)
-one stick of OCZ DDR3-1333 ram (2GB)
-Samsung DVD burner
Used:
-Rosewill 600w powersupply
-XFX 8800GT video card
-WD 320GB SATA hardrive
-Enermax Uber chakra case