Pc won't turn on

Okay, I will be as detailed and compact as I can. I have a gateway dx4300 pc I bought new probably four years ago and this is first major problem I have had. So the computer is running perfectly fine, no problems at all. Was in the middle of testing someone and was holding keyboard in lap as I sat on my bed. I dropped keyboard but caught it mid-air before it dropped and must have hit some key(s) like power or something as the screen on monitor completely went out (but still on) and now keyboard has no functionality (no lights either on cap/numb lock). So I checked all connections, unplugging and replugging etc, turned off and on, checked outlet and monitor. Same thing when restarting, no keyboard functionality or lights, no beeps or noises, monitor is fine but says no signal and I use a wifi adapter that always lights up/runs if computer is booted up, and that wasn't lit as well. But powers up and sounds fine. So I try a couple more times turning off then on when now it won't turn on at all. No beeps, nothing. No power light nada. Can't imagine what I did by initially hitting some keys but I'm really freaked out as I didn't have hd backed up yet and there is irreplaceable info on hd. Started to take screws off case but of course came across pesky stripped screw and decided will have to take somewhere in Chicago to have it looked at asap. Just wondering if anyone can offer any clue as to what I may be looking at and if think may be fixable? Would rather pay couple hundred to fix and retain hd rather than just replace. Thanks!!!!