I recently decided to replace my thermal paste on my CPU due to the fact that my cooler fans got really loud during high CPU usage (video games). I also decided that it would a good idea to clean my case at the same time. So I first pulled the external cables and took my PC outside with a can of compressed air. I cleaned all of the surfaces including filters, fans, etc, and re-assembled the case. I did not remove any of the internal parts for this process.
I then took the box back inside and proceeded to replace the thermal paste. I removed the CPU and cleaned both the CPU and cooler block with 97% isopropyl alcohol. I put the CPU back in, applied the paste, reconnected the cooler block. The problem that I'm having now is that I can't seem to get the thing to show anything on the monitor and I don't think that the box is posting. No error codes, no beep codes, nothing on the screen. The thing is, the hardware appears to be fine. All fans are spinning, all LEDs are on, and everything appears operational.
Here's the steps I took to troubleshoot:
Pulled out the video card and connected the monitor to the onboard video port.
Tried two different video cables in two different ports (DP and HDMI)
Tried a different monitor
Re-seated the CPU twice and verified the correct orientation of the chip each time
Re-seated the memory
Re-seated all of the cables internally (except the USB3.1 controller cable, I'd have to pull off the mobo to get that one out)
Cleaned all of the thermal paste off of the CPU and cooler block and attempted to run the box without the cooler block attached
Pulled out the CPU again and cleaned off both the front and back of the chip with isopropyl alcohol
I currently have the CPU cooler block detached and no thermal paste is applied. The CPU itself does heat up after letting the box run for about a minute, so it is getting power. Again, all other hardware components appear to be working as everything is lighting up and/or spinning as appropriate.
My hardware highlights:
Asus Maximus iX code mobo
EVGA SuperNova 850 G2 power supply
Corsair Hydroseries H115i
Intel i7-7700k CPU
Samsung 960 EVO M2
Nvidia GeForce GTS 1080
G.Skill Trident Series DDR4 RAM
Anyone have any ideas for how to get my computer to behave itself again?