techPowerUp! Forums - View Single Post - Cougar S550 + ASRock 970 Extreme4: PC does not power on

scooper22 · Oct 23, 2011, 04:26 PM

Hi there. Thanks for the hints and the cool picture

!

I rebuilt by old rig (old MB, CPU and stuff) with the Cougar and it instantly works flawless. So the PSU seems to work here (and has since 2 years).

On the new rig I stuffed all cables into the right sockets (verified multiple times, they are also protected from wrong assembly by coded connectors) and I tested all combinations of 20/24-pin ATX and 4/8-pin CPU to no avail.

The new rig with an old ATX PSU worked instantly (!).

This leaves me with:
old PSU + old MB = works
new PSU + old MB = works
old PSU + new MB = works
new PSU + new MB = no power-up

I haven't tried hardwiring pin 16 to GND. I know it's about the same as pressing the power-button (not exactly) but I feel coward fumbling with a bent wire here ^-^ .

Also I think it *will* power up because the Cougar-PSU *does* work - but in the old rig.

I read some PSUs won't power up if there's no load on both 5V and 12V wires so I connected the Gfx and drives to the PSU, but it didn't change anything.

Processor:	HDT90ZFBGRBOX (uv, oc)
Motherboard:	90-MXGIP0-A0UAYZ
Cooling:	VENOMOUS-X + TR-FDB-12-600 + PLPS
Memory:	F3-12800CL9D-8GBSR2
Video Card:	21188-00-40R + DCACO-V3400-BLA01 (uv, unlock)
Hard Disk:	WD10EALS-00Z8A0 + 4044951000029
Optical Drive:	AD-7280S-0B
CRT/LCD Model:	VM633AT
Case:	FT02B-W
Sound Card:	SB0090, ALC892
PSU:	BN162

Oct 23, 2011, 04:26 PM	#4
scooper22 Join Date: Jan 2011 Location: Central Europe Posts: 108 (0.13/day) Thanks: 13 Thanked 31 Times in 20 Posts System Specs	Hi there. Thanks for the hints and the cool picture ! I rebuilt by old rig (old MB, CPU and stuff) with the Cougar and it instantly works flawless. So the PSU seems to work here (and has since 2 years). On the new rig I stuffed all cables into the right sockets (verified multiple times, they are also protected from wrong assembly by coded connectors) and I tested all combinations of 20/24-pin ATX and 4/8-pin CPU to no avail. The new rig with an old ATX PSU worked instantly (!). This leaves me with: old PSU + old MB = works new PSU + old MB = works old PSU + new MB = works new PSU + new MB = no power-up I haven't tried hardwiring pin 16 to GND. I know it's about the same as pressing the power-button (not exactly) but I feel coward fumbling with a bent wire here ^-^ . Also I think it will power up because the Cougar-PSU does work - but in the old rig. I read some PSUs won't power up if there's no load on both 5V and 12V wires so I connected the Gfx and drives to the PSU, but it didn't change anything.