[SOLVED] My PSU fried my motherboard (I think)

[sufplays]

a couple of weeks ago, my younger brother was playing over watch on my pc. he came to me and told me that it randomly turned off and wouldn't turn back on. i've tried changing the bios battery, changing the jumper position, new ram. none of these worked. and then i tried my power supply using the paper clip method. it didn't turn on so i knew my PSU was fried. i've only had it for 2 years but it's a cheap chinese one so i've had no luck with customer support. i've bought a 750 gq EVGA PSU now and when i plugged everything in, my pc showed signs of power. all the regular LED's were on, all fans spinning, but there was no signal to the display, however my mouse and keyboard LED's turned on too (for some reason the case power button didn't allow me to turn on the pc but allowed me to force a shutdown) i tried putting all of my parts into and old system i had and so the only difference is the CPU and motherboard and it boot up fine. would it be safe to assume that my motherboard is fried?

My components are as follows
i7-2600 3.4ghz with a noctua nh-d15
gtx 1060 6gb
some lenovo workstation mobo, can't identify it
2tb hitachi HDD
160gb seagate barracuda HDD
120gb kingston SSD
8gb hyperx ddr3 ram
750 watt EVGA GQ semi-modular psu. any help would be appreciated

 

[jojesa]

Cheap PSUs, more often than not, take components with them when they fail, sometimes even before they fail.

Some motherboards, specially workstation grade, will power down and prevent powering on to protect components.
Try resetting the motherboard and see if there is any life left.
Unplug the power cord.
Press the power button for 20 seconds.
Remove the CMOS battery and leave it out for 10 minutes.
Place the CMOS battery back, plug the power cord and power on the system.