Mainboard (not) running, PSU (Not) running

[mogobarbar]

Hi all, 

 

I have a strange behavior.

 

All 3 PSUs are working. (short wired them), but only one can make the mainboard start.

 
2 brand new one‘s don’t start the mainboard

the old one is working and can start it.

 

what the …..

 

Any ideas?

 

BR Mogo

 

[Hinjima]

2 minutes ago, mogobarbar said:

Hi all, 

 

I have a strange behavior.

 

All 3 PSUs are working. (short wired them), but only one can make the mainboard start.

 
2 brand new one‘s don’t start the mainboard

the old one is working and can start it.

 

what the …..

 

Any ideas?

 

BR Mogo

 

Full list of PSU's, Motherboard and parts please.

[mogobarbar]

I put the mainboard on a desk.

 

working PSU: Seventeam 750W V-Force Series

not working PSUs: be quite! Pure Power 12m 850W; Enermax Revolution D.F. 650W

 

Other parts:

Mainbord: MSI B760 Tomahawk Wifi

CPU: Intel Core i5 12600K 10 (6+4) 3.70GHz So.1700 WOF

RAM: 32GB (2x 16GB) Kingston FURY Beast DDR4-3200 DIMM CL16-20-20- Dual Kit

SSD: 1TB Kingston NV2 NVMe M.2 2280 PCIe 4.0 3D NAND (SNV2S/1000G)

CPU Cooler: be quite! Pure Rock2

 

 

I did not plugin the any graphics card, hdd, dvd drive.

 

Before this test on the desk, I put everything together in the case with GPU etc. and used the be quite! Pure Power 12m 850W and it did not start.

Then I did this test on the desk.

 

Any ideas ?

[mogobarbar]

Solved: Not every cable at the 2 not working PSUs was wired correct