Aim a laser at it at a well-chosen frequency (or just use one high enough that nothing reflects it, you don't have to go that high for that), send up a couple kilowatts of power, and just wait. The cooling will not compensate and just heat the satellite to 1000 degrees or so. If needed do it for a week, a month (assuming 10W laser power isn't outright enough to destroy the solar panels or antenna or some other critical component)
Yes, I get that aiming it is pretty hard, but we've hit far smaller targets.