New build not powering up

krooton

krooton

krooton

Caporegime
Joined
9 May 2004
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Leafy outskirts of London
I've spent most of today moving my main rig in to a matx build, keeping everything apart from the motherboard.

Plugged everything in, press power, but no post. None of the fans power up at all, the PSU is fine, that power up when plugged in, and the power light on the mobo is on.

I tried various changes of the front panel connector, no dice.
Short the pwr pins with metal, no dice.
Clear CMOS, nope.
CMOS battery out, nope.
Switched up RAM, still nothing.
Bare minimum devices connected, nada.

Dead mobo?

What a waste of 5 hours!!
 
make sure the 24pin and 8/4pin connectors are pushed in properly, even if there is a problem with the cpu, ram or bios it should at least start the fans.
 
Have you put a different CPU in the motherboard ?

Check to see if it is right and no pins have been bent by accident.
 
Existing CPU, and even if the pins were bent, the fans would power up wouldnt they?

I now have the mobo tray out the case, both power cables connected, single stick of RAM, and cpufan connected. Power light on mobo is on, but shorting or using case power header still doesn't turn anything on.

Next thing is test my backup MATX mobo I guess.
 
Now I am really confused, put everything in to my back up matx board, now the fans spin up (progress!) but then spin down shortly after.

Unplugged all sata, single stick of ram, same thing again and again. Arg!
 
I know you say you've tested it, but it sounds like the PSU to me, do you have another you can try, maybe its not compatible, its not unheard of.

Are you fans etc connected to headers on the Motherboard or a controller ?

You can test the molex connectors only on the PSU by using the paperclip test and plugging in drives and fans to molex connectors on the PSU, however, people mistake this as a working PSU, it doesnt necessarily mean the 8pin and 24pin connectors are ok, it just supplies power to the molex connectors, its how water coolers leak test so that nothing else has power running to it if they spring a leak.
 
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PSU was working fine this morning, and is only a year old.

Just tested the new mobo in my mining rig (using a different psu and cpu) and still no post at all, not even a fan spin, so that is definitely the motherboard that is borked.

What I don't understand is why my main gear with my working back up board isn't fully booting.

I really can't be bothered with putting everything back in to my ATX tower, it will take hours, shouldn't have bothered trying to move to matx :(
 
Tried back up PSU, same thing.

Could a cpu cause this?

I've tried 3 different sticks of ram, in different slots, unplugged various things, the only thing I can think of is my cpu, but why would it suddenly die for no reason?

I guess I could test my celeron in it and see...
 
ouch, are you absolutely sure? that's the first time i'd personally heard of a dead CPU. aAre all the pins on the mobo ok, and theres nothing on the underside of the CPU itself?
 
dacads said:
Why would CPU stop say a case fan from spinning?
Click to expand...

not sure exactly why but all sorts of weird stuff will happen when cpu is playing up or not making good contact with all pins

also re this thread have you compressed air the cpu socket before seating the cpu?
 
I wouldnt of thought the CPU would stop the system from powering up, it just wouldnt post, can you try it without the CPU in it at all.
 
Cheers guys, it must be the chip.

Swapped it out for my backup G1620, and that works fine, so no issues with the mobo pins.

Whilst I don't have a strap, I am cautious and discharge regularly when working with pc bits. To date I have never killed any component with static. :(

No warranty as it was bought second hand, booo!
 
Warranty still counts 2nd hand from what i experienced :)

Just get in touch with intel rma and tell the truth...you have a faulty/broken cpu...they never asked for a receipt for mine (i didn't have one either) but as long as its in warranty they will replace.
 
Cheers, just fired Intel an email with all the details, fingers crossed.

Just did one final test, cpu, stick of ram, psu. Mobo power led is on, no post, at all, not the slightest bit of fan movement.

Funnily enough, a G1620 and 290x is still capable of playing Guild Wars 2, LOL! Just can't do anything with loads of other players.
 
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