[SOLVED] PSU not working Please help

[Josin12]

Hi, So I got a RM 750x and the other day I plugged into the power socket but the fans are not spinning. I haven't got my motherboard yet. Should I return it thank you

 

[richiestang_78]

Hi, So I got a RM 750x and the other day I plugged into the power socket but the fans are not spinning. I haven't got my motherboard yet. Should I return it thank you

The fans wont spin unless the temp reaches a point where they need to turn on. Its fine.

 

[jonnyguru]

Hi, So I got a RM 750x and the other day I plugged into the power socket but the fans are not spinning. I haven't got my motherboard yet. Should I return it thank you

If you don't have the motherboard, how did you expect the PSU to turn on? Did you put a paper clip on the power on and ground wires or do you have a handheld PSU tester?

 

[Josin12]

Thanks for replying. But I tried to plug to my case fans which are connected to a controller and are powered through the sata cable but they won't turn on why is that if you don't mind me asking

 

[jonnyguru]

Thanks for replying. But I tried to plug to my case fans which are connected to a controller and are powered through the sata cable but they won't turn on why is that if you don't mind me asking

Because you don't have the motherboard.

The 24-pin cable has one wire called "POWER ON". When the motherboard holds this signal to ground, the PSU turns on. You can't take a power supply and just plug it into the wall and expect it to turn on just because you flip the switch on the back. That's not how power supplies work.

You can, however, "trick" the PSU into thinking it's plugged into a motherboard by jumpering this POWER ON pin with one of the ground wires: https://bit-tech.net/guides/modding/how-to-jump-a-psu/1/

 

[Josin12]

Cheers man I really appreciate you helping me out.

 

[Deicidium369]

The fans wont spin unless the temp reaches a point where they need to turn on. Its fine.

They will never spin up, regardless of temp - if it's, you know, not turned on. Electrical devices tend to need to be turned on...

 

[richiestang_78]

They will never spin up, regardless of temp - if it's, you know, not turned on. Electrical devices tend to need to be turned on...

I'm aware. I was assuming he was jumping it to test it.