Picked up a two year old 897D from an SK and with no antenna connected and running on battery power or with an antenna connected and running on power supply power, internal or external, I get lots of static just like an am radio in a lightning storm. I thought it might be picking up some static in my shack so I went through the drill of several power supplies, and with the antennna connected and disconnected and even went to portable pack and carried away from electrical equipment and still has static crashes. Did a complete system reset with no change.
Seems to receive fine but with the static always in the background. It drives the LDG external meter nuts with the static noise. I hooked up a IC-706MKIIG in its place with no antenna and only heard the white noise so it appears to be internal to the 897D.
Got some clues out there? Bob in Texas