The cutoff display to me means check the CPU as well. You'll need spares or a shop with spares to determine if CPU or motherboard. The problem here is the min shop fee of 150 bucks. That could be more expensive than a new motherboard and CPU.
Why 600? https://www.reddit.com/r/PCMasterRace/wiki/builds has CPU and board combos at under 200.
Hey, I am currently running:
GPU: gtx 1060(brand new)
psu: corsair tx 650
RAM: 2 brand new ripjaws 16 gb gddr3
ssd: kingston 250gb with windows 10
hdd: 1 TB seagate
Anyways, so I woke up this morning to super loud fan whining and no display, so I thought oh damn there goes my new GPU. I tried moving my dvi cord to my motherboard to run off that... didnt work. So I tried moving the hdmi I have on my second display to the on board, it worked but it was very messed up with all sorts of display issues, anyways then I just fully removed my gpu and it seemed to clear up those issues but I can still only use the hdmi port on the motherboard the dvi does not work and it still is having some weird issues. Right now It is clear but the top portion of my screen is cut off.
I just need opinion before I drop $600+ on a new decent mobo + cpu.