New build won't power on

dumbmayhem

dumbmayhem

dumbmayhem

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Joined
23 Sep 2006
Posts
85
Location
Wishaw, Scotland
Hi guys.

I've built many PCs over the years so I don't regard myself as an idiot but I'm also self taught so I also don't deny I may be making a silly error.

The specs are:
Gigabyte GA-AB350M Gaming 3
Ryzen 5 1600
Corsair DDR4 3200 16gb ram
Corsair rm650x I had lying spare

I built the system up with these new components and the other essentials from my old pc only for the PC not to power on. I stripped everything back out bar the MB, CPU and ram for it to do the same - a faint beep from the PSU.

I tried the PSU from my old system and it wouldn't power on either so that ruled out my new psu and the old one powers with the new.

I RMAd the MB who sent out a new one today. I connected the CPU, fan and ram. Connected the 8 and 24 pin ATX connection and same again - when I hit power it gives me a tiny squeak.

I've triple checked my front panel headers and only connected the power switch but no joy.

Please send some help
 
Assuming that you've connected both 4 pin 12v cables?

If so then motherboard on a box, connect just the essentials and short out the 2 pin power jumper on the motherboard manually - go from there1
 
Because you've been mixing parts, are you definitely using all the new cables from the new PSU?

My buddies build wouldn't turn on when we swapped out his old PSU for a new one, it's because we were trying to reuse the old modular cables with the new PSU. Once we swapped out the cables for the ones that came with the PSU, everything worked great.
 
twistedheat said:
Because you've been mixing parts, are you definitely using all the new cables from the new PSU?

My buddies build wouldn't turn on when we swapped out his old PSU for a new one, it's because we were trying to reuse the old modular cables with the new PSU. Once we swapped out the cables for the ones that came with the PSU, everything worked great.
Click to expand...

I was about to suggest the same as the above.
 
Maybe something is causing a short?

You could try breadboarding it e.g build out of the case on top of the mobo box with just the mobo 1 stick of ram, cpu, and psu connected and if it powers up that's a good sign. If it doesn't it's probably either cpu or mobo.

If it works out of the case gradually add every component in one at a time and test until you find what's shorting it.
 
build out of the case, on the mobo box .

if two new mobo's then could be PSU or short . Board should have fault LED either top or bottom right hand corner

reseat CPU, one stick in slot 2 .... CPU > EMPTY DIM> POPULATED DIM > EMPTY > EMPTY > END OF BOARD

8 pin at the top of the left hand corner seated correctly and not an 8 PIN GPU cable etc
 
Only thing that comes to mind, since you've tried different mobos and psu's, is that some Gigabyte boards have been a bit particular with power supplies. My old Z77 board wouldn't power on with anything under 550W. Tbh, your 650 Corsair should rule that out, but if all else is equal, might be worth trying another PSU.
 
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