Question MSI B450M BAZOOKA PLUS - PSU connector issue

Hi guys!

I have a unique problem with this type of motherboard...

The issue is; After we turned on the computer, the motherboard won't run its startup test. As you can see there is no installed memory but it should make no installed memory noise.
There are some LED next to the 24pin conncetor which indicates the power on self test, after we put some pressure to the connector the motherboard turned on.

It turnes on when the motherboard bended a bit




What could be the problem?
 
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