Pc doesn‘t turn on, Peripheral LEDs still blink

[LucPhiFra]

Hey guys,

 

I‘m new to this Forum and desperately need your help.
 

Yesterday, I connected a new HDD to my computer. When I reconnected the cable of my PSU and tried to boot my computer, it didn‘t Turn on whatsoever. Only my keyboard and mouse have blinking LEDs as long as the PC is connected to an Outlet.

 

My First thought was to take out the HDD I had just installed, which wasn‘t fixing the error. I‘ve also tried other troubleshooting steps like waiting 2 hours with the PSU Switch set to off and Power disconnected, replacing my MoBo cr2032 battery, trying to Remove all drives and even swapping out my graphics Card. I‘ve also tried disconnecting and reconnecting the 24pin MB connector and swapping RAM sticks. All of the steps above didn‘t help.

 

Since I am a photographer and videographer, i Need a PC to edit and earn money.

 

Do you guys think my Motherboard/PSU is Fried? My System has Been running Just Fine for about 8 years now.

Thanks for helping a PC Noob out.

 

Specsheet: Intel I7 3820

                   AsRock x97 MB

                   16Gb LPX 1600mhz RAM 

                   GTX 1050ti

                   Samsung 860 250Gb SSD

                   Bequiet Bronze plus 500 Watt Dark ‘something‘ PSU

                   Windows 10 Pro latest update