WTH Happened

[CRobb66]

SO I bought a new pc, 8700k, 1080ti, blah blah, all is good with that pc. My old pc was a i7 6700k, msi z170a gaming m5 mobo, 1060 6gb, 16gb ddr4, ssd, etc. So I decided to sell it, so I took it apart to clean it, all the fans, replaced thermal paste on cpu cooler, I done this many times with no issues. So Im all done with the cleaning, all together, took pics for selling, put it in box and was cool. Noticed I had no pics of it on and working, so I unboxed it, hooked everything up, and I get nothing for my keyboard, mouse or picture on monitor. Monitor, keyboard and mouse work fine on new pc. So what happened? I used some canned air to air out the case, which was very little as I upkeep my pc very well. Any advice is welcomed. I was thinking the mobo, but why? It powers on, fans work, GPU fans not running, but Im not sure if they do until under load. Its a gigabyte 1060 6gb OC card. I get nothing for keyboard or mouse on ANY usb slots. I also changed slots for the video card, nothing as well. Shrugs. 

[Eliptic]

Can you at least get into the BIOS and see if there are any issues?

[Senzelian]

I'd straight try to clear the CMOS in that case, since you are selling it anyway.

[wojtepanik]

90% of cases is that something is not plugged correcly 

[CRobb66]

@Senzelian , so basically take the battery out of the mobo for a bit and replace it? Not sure how to get into bios with nothing on the monitor.

[Senzelian]

3 minutes ago, CRobb66 said:

@Senzelian , so basically take the battery out of the mobo for a bit and replace it? Not sure how to get into bios with nothing on the monitor.

1. Turn the Computer off.
2. Turn the PSU off and unplug it from the wall.
3. Press the power button for a couple of seconds to get rid of any electricity build-up that is still in the system.
4. Remove the CMOS battery.
5. Wait 2 minutes.
6. Plug the battery back in, plug the PSU back in, turn it on and turn the PC back on.
7. Pray...

[CRobb66]

@Senzelian Will do, battery been out a bit, lets see what happens, thank you. Will update.

[CRobb66]

@Senzelian Yeah so it still the same, powers on, fans working, no lights on Keyboard or mouse and no picture on monitor. The only thing I unplugged was the video card power cord and it is plugged in fully, even tried different cable. So the  mobo went poof somehow?

[Jurrunio]

try reinstall RAM, plug in the CPU/EPS power connector, reset the graphics card, and connect the display output to that card.

[CRobb66]

I give up for tonight, its 3am, going to bed. I checked all cables are confirmed plugged in all the way, although the only cable I unplugged was the video card. No keyboard lights or mouse and no video, it worked before I cleaned it. Sigh.