"No Bus" temporary and final fix

I have a 2000 Dodge Durango that would stall and then say "No Bus" on the odometer. It did it a couple of times last Summer, and then not even once over the Winter. When it started warming up outside it happened all the time. I tried replacing the Crank Shaft Sensor, as this in one possible fix, but it did not fix the problem. In the mean time, I decided, that because it didn't ever happen during the Winter I would pack a bag of ice around the computer to keep it cool, and it worked! I would buy a bag of ice from a gas station, open it and pour some ice out right around the computer (the bag won't fit or let the hood shut if it is full), then I would reseal the bag, and pack it in around the computer itself. This temporarily fixed my problem, however I knew that it wasn't a final fix so I called the dealership for the price of a new computer. They quoted we just under $600 for the part, and $85 dollars for labor. I didn't have a spare $685 dollars so I called AutoZone. They charged me $276 plus a $65 core fee (which I got back when i returned the old computer of course). I took the thing home and put it in myself. It was the easiest fix I have ever done on a car and I am not a mechanic. It literally took me about 5 minutes to disconnect the battery, removed the 3 bolts that hold the computer in place, disconnect the 3 electrical connections on the computer, and then do the same thing in reverse. If you aren't sure it's the computer, try the "ice fix" and see if it helps. If that does it, DON'T go to a dealership and pay the high price unless you can afford it. Order if from AutoZone. They will ask you for the VIN, the milage, and a few other things. They have to order it over the phone, and give the company they call the info you supplied, and download all the info for your vehicle to the new computer. It is then delivered to AutoZone via Fedex in about 2 days.