Galaxy IV was a model HS-601 satellite built by Hughes Space and Communications Company (HSC).

Failure of the primary control processor was attributed to tin whisker growth, a phenomenon in which tendrils grow from solder, causing an electrical short circuit.

The satellite manufacturer, Hughes, has replaced pure tin plating with nickel to alleviate the problem in newer designs, adding 100 to 200 pounds (50 to 90 kg) per payload.

All 600 NPR-affiliated stations (as well as numerous other broadcasters) lost access to current network shows and newscasts.

Galaxy VI's relocation required an emergency order from the FCC, taking one week drift time to change orbit.