That HD came out of my bunk Tivo (work in progress). Ruled out bad capacitors on the PSU. Just starts up then all the lights stay lit and the monitor goes blank. I would normally upgrade but it has lifetime on it.  I restored the drive using a torrent iso of the same TIVO HD but to no avail. Really miss my tivo! The Damn cooling fan died for god knows how long and the rubber stoppers on the bottom of the case crumbled from the heat.

53 is air cooled on the 980. The pc doesn't obstruct the vents and yes it is a portable a/c unit. I use it when my power is free to keep my room (and miner) cool. I open the panel side in view and hinge it so that the cold air goes straight into the case.
Prob not the best idea because of risk of falling, I put it down when it's cool enough outside to open the window.