Got the computer back last week. Noticed when I would leave it for a few hours it would go into a deeper version of sleep. The monitor would come back, but it wouldn't receive any input from the tower.
Fortunately, the place I took it to the first time has a ninety-day warranty on their jobs.
The tech who worked on it the first time says that he personally doesn't use sleep on his, that in his experience it causes problems for a lot of computers. He believes this new problem might also be connected to the power source for the tower. My desktop is back in the shop, but at least it's covered under the warranty this time. When I get it back I'm going to take this guys advice, disable sleep mode and simply turn the computer off when I'm not going to use it for a moderate length of time.
Back at the library using their public ones
, but the shop said I should get it back by the end of the business week.