Well, I know this is an old thread, but there is finally a happy ending/solution.
It turns out the COMPRESSOR was fine.
What needed replacing was a relay on the back of the compressor. If you search YouTube, you can find several videos on how to do this.
The replacement part is an ERP410 Hardstart. Google this and you can find several vendors.
After installing, the Skybox is now "Right as Rain", and working beautifully again!
Repair was about $15. Why Maytag doesn't know/support this is beyond me.