Question PC turns off immediately after turning on. Motherboard lights are all on.

[Michallo]

Hi, hopefully this is the right place for me to find the resolution to this tragedy.
Today i received my new PSU and so started changing everything from my current setup with the new PSU.
Just so you guys know I've got TUF Z390-PLUS GAMING motherboard, i9-9900k and 8x4 3200mhz Corsair ram, if this helps.

The problem is whenever I turn on the pc, motherboard has its all lights turn on, but whenever I turn it on, it lights up for a second, then it shuts down. From what I tried myself, clearing CMOS, RTC RAM does nothing. One thing that I see that makes difference is running the pc without the 8pin eatx12v connector. The motherboard runs without ever booting up.

I already took out the motherboard out of the case so pretty sure it's not short circuiting with anything metal.

Im uploading a video showing how the motherboard behaves when turning it on.

View: https://youtu.be/_Npmk9bXGN8


Someone please help!!!

 

[rgd1101]

and the psu is?

 

[Dark Lord of Tech]

What power supply? And are you using the right cables with your new PSU. Using the cables that came with your new POWER SUPPLY.

 

[Michallo]

New one is UD850GM, The old one is VS650. Tried both after exchanging PSU i have to use the two different sets of cables as one is modular old is non modular