Pc won't turn on until I flip PSU off then on then press power button.

[fbondiskey]

I just got a new motherboard, processor, ram, and case. I pulled the power supply, GPU and HDD from old build where everything was perfectly functional. Upon putting the new build together the power button on the case does nothing until I turn the power supply off / on then press the power button again. What is causing this? I read it could be the power supply but it was working fine right up until I moved it into the new build. Is there are repercussions to booting up like this? Is it harmful to flip the PSU off then on every time I need to boot?

Spec: PSU Corsair TX750
GPU r9 290
CPU i7 6700k
Mobo Gigabyte Gaming 1
HDD WD red
Case is antec 900

 

[Dark Lord of Tech]

Did you perform a clean install of windows , you should with a board change.

 

[fbondiskey]

I did not. Could that be causing this issue? I was expecting it to deactivate itself, But I honestly did not think this could be a software related issue.

 

[Dark Lord of Tech]

With a board change and no fresh install of windows , issues like this are common.

 

[fbondiskey]

So is there any repercussions though? I'm gonna get a SSD next week and I'd rather wait to do the install then

 

[Scottray]

I'm thinking that this is more of a BIOS issue. Check your motherboard's owners manual for how to reset the CMOS.
1. Disconnect the power cord from the PSU,
2. Remove the CMOS battery
3. Jumper/short together the CMOS reset pins.
4. Replace the CMOS battery.

Now try booting up again. Do you still have the same problem?