Try disconnecting as many things as possible from the PSU (disconnect dvd drive, secondary hard drives, case fans, etc). I had a similar problem with my 4890 still powering up, but suddenly not outputing any signal. An old CD drive and the PSU had apparently stopped playing nice, and the 4890...
DVI is good enough for home theater TVs, since you would usually be running audio just through a receiver (not the TV). For a few years, you could save a few hundred bucks getting a tv with just a DVI input instead of HDMI (I did that) - sort of like a decade ago you could save a ton by getting...
I highly recommend a side keypad over a "gaming keyboard". I use the Belkin N52 Gamepad (the current version is the n52te I think, which has blue backlighting). For one thing, a proper gaming keypad will let you make real use of your left thumb, as opposed to just mashing the space bar. The...