I built a system in this case and I went to turn it on and nothing happened... except the power light flashes. Any suggestions?

there is may be 2 problems
1. check your CMOS battery. may be that battery is discharge. if yes you have to replace it.
2. may be your processor is not seance by your motherboard. in that condition you have to repair your motherboard.

Hello download the manual here:

http://www.msi.com/product/mb/890FXA-GD70.html#/?div=Manual

And check the front panel connections again.

You might have connected this the wrong way.

Good luck

many, not all, psu's will internally tripo after this happens. how to reset:
1 if it has an on/off button turn off for 1 min and turn on.
2 if it has no button but has a 110/220 switch, unplug it then switch to 220 then back to 110 (also this may be 115/230 or even 120/240)
3 if it has neither of these, unplug it for 10 mins, then replug it and start up.
also when you opened the case did you smell anything funny? if so i would say that the mobo and/or cpu are done for. i doubt this tho because you had them on a surge, but it is possible.
1 more thing when you opened the case did you by chance knock a wire loose from the mobo?(motherboard)
after re reading your post i question whether the surge strip is good, because you said it was tripped and yet you had the posu light on. or did you mean a light inside the case of the computer itself?
if none of these suggestions help you please re post with answers to the questions i asked thanx and hope i have helped.

Pretty new system, so try on just AC power (remove battery) failing that, get in touch with Acer for repair under warranty

Solution to the problem:

Discovered that the dishwasher was covered by our household insurance policy. Phoned and arranged for it to be repaired or replaced (no charge). Engineer coming on Friday.

this is most likely the sustainer board(s) problem. Replacing the sustainer boards should correct this problem for you. you can get the parts at vancebaldwin.com

replace the sustainer boards should correct this problem. New sustainer boards may cause red and green pixilation. If this happen, replace control board and TV is as good as new.

since the components are new,it must be other problem...I think that the problem is at the motherboard's jumpers...the power button, the restart button have wires that connect them with the motherboard so, u must not mess up the jumpers...i suggest u should download your motherboard manual and see exactly how the new components should be installed...
HERE, HOPE IT HELPS...
http://users.iafrica.com/g/gl/glynhall/hohweb/manuals.htm

With a system error there is actually no way to fix this problem at home, it will need to be sent in for service. A system error is internal in the camera and usually is a software issue. The service center's number for Casio is 1-800-706-2534, then option 1.

I have the same problem. The only way to get the TV to come on is to unplug it, but once you get it back on it turns itself off again in a few minutes.