I bought be quiet dark rock pro 4 cooler and changed today with old one deepcool gammaxx 400. I installed everything correctly and when i turn on pc i got no signal on my monitor. Tried display port and dvi dual link but still no signal. Both coolers working properly on dark rock pro 4 when i turn pc on. Also i tried different ram slots for my 2 ram sticks. Both ram stics are same 2x8gb corsair vengeance lpx. Switched off every cable on mothrrboard and turned on again, nothing helped, at the end i decide to remove cmos battery for 5 min. Again no display signal. After all of that i give up and decide to install old my old cpu cooler deepcool gammaxx 400, and now i got same problem even with old cpu cooler, no display signal. My specs: i7 9700k, msi mpg z390 gaming plus, nvme ssd, sata ssd, sata hdd, zotac rtx 2070, thermaltake 750w gold 80. I really don't know what is the problem did i damage my cpu or something else.?