PC won't post, constantly turns off and on every 5 seconds (Corsair PSU)

kucyk

kucyk

kucyk

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7 Jan 2011
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Hi guys,

I am urgently looking for your expertise and advice before I will go for RMA direction :(

Here is what I got from overclockers.co.uk:

Intel Core i5-4460 3.20GHz (Haswell) Socket LGA1150 Processor
Gigabyte B85M-DS3H Intel B85 (Socket 1150) DDR3 Micro ATX Motherboard
Corsair XMS3 8GB (2x4GB) DDR3 PC3-12800C9 1600MHz Dual Channel Kit
Corsair CS550M 550W Semi-Modular 80+ GOLD

I suspect one of those items is DOA. The problem I am experiencing is that as soon as I hit the power button, the power supply will turn on, cpu fan will spin up, and shut off after 5 seconds. Turn on again (all automatically) turn off again. Turn on, turn off (repeat cycle until I unplug the power cable).

I've removed everything from the case and now the only things I have connected on my desk are the Mainboard + CPU + RAM but still no luck.

I was able to swap a CPU but no luck.

I also tried:
Turn the power supply on + mainboard + CPU + NO memory = no luck, no beep
Turn the power supply on + mainboard + NO CPU + memory = no luck, no beep
Turn the power supply on + mainboard + NO CPU + NO MEMORY + = no luck, no beep

No beeps, dead silence, nothing. I don't have a spare power supply or mainboard to swap, so I am wondering have you ever experienced or seen this kind of problem?

I did some google and I can find some threads opened by people owing this power supply and having the same symptoms, but no real solution.

I will appreciate any help!
 
Everytime I've had the power cycle problem with an Intel chipset Gigabyte motherboard it was always the motherboard which was faulty.
 
Bit of a daft question - Is the 4 or 8 pin CPU power connected along with the main 24 pin ATX connector.

Also last resort try a CMOS reset :)
 
Does that mobo have a speaker? Only took a quick look at it on the gigabyte page, think it doesn't haved one so no beeps, ever.
Have you got an external or case one to use, to try and hear any beeps?
 
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RJC said:
Bit of a daft question - Is the 4 or 8 pin CPU power connected along with the main 24 pin ATX connector.

Also last resort try a CMOS reset :)
Click to expand...
Of course it is, without it the power supply turns off after 1 second.
Tried CMOS reset, no luck.

David Bisset said:
Does that mobo have a speaker? Only took a quick look at it on the gigabyte page, think it doesn't haved one so no beeps, ever.
Have you got an external or case one to use, to try and hear any beeps?
Click to expand...
I've connected the speaker that came with the case to the mobo.

malachi said:
Everytime I've had the power cycle problem with an Intel chipset Gigabyte motherboard it was always the motherboard which was faulty.
Click to expand...
Thanks for that, I think it's either mobo 70% or PSU 30%

Terrier_Jimlad said:
no memory = no beeps? sounds a bit suspect, I would expect it to be moaning at that point for sure.
Click to expand...
That's what I was expecting to hear too

At this stage I am going to order a mobo and PSU from Amazon (I have to have this machine up and runnig by Friday) and don't have time for the RMA process :/
 
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Try a single memory stick. I have had a problem recently with a gigabyte motherboard and have found it won't support dual memory mode. Mine switches itself on and off as well.
 
peterwalkley said:
Try a single memory stick. I have had a problem recently with a gigabyte motherboard and have found it won't support dual memory mode. Mine switches itself on and off as well.
Click to expand...

Will try that, do you reckon the motherboard would not even beep if there are no memory modules present? :>
 
Yes the motherboard should let out a series of continuous beeps if there is no memory present. you could also try removing one stick at a time and swapping it over to see if it could be a faulty/incompatible module.
 
all I would say is try building out the case, just to make sure its grounded.

do the paperclip test, and then see if the case fans spin.

run with only 1 module of ram, keeps switching throughout to see if you get any errors/glitches with one of the modules.

try with no GPU connected.

DOUBLE check all connections. (stupid and your probably getting fustrated with people telling you this, but it happens ALL the time.)
 
I had a very similar problem long ago. It turned out that I'd mounted the heatsink the wrong way round so it wasn't making contact with the CPU. Naturally, the thermal cutout kicked in very quickly. Unfortunately I failed to spot it and eventually cooked the CPU.
 
Guys, thanks for all your tips. I got another mainboard delivered today and all is working fine now, so it was a faulty mainboard...
 
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