The DST 3000 is a clone of the Hughes E-86 and as hdtvtechno says, they has a habit of running very hot and many of them have failed as a result. If you get one that works, don't put it in an enclosed space, don't put any other equipment on top of it, put a small computer fan on top of the box to help keep it cool and keep your fingers crossed!
If it's not costing you anything (or not much) it is an excellent receiver for both OTA and satellite if it is working. Mine died of heatstroke about a year ago....