[MRCA] sunair RT-9000B/9500 power issue

[W2HX]

Hi friends,

Recently acquired a nice set up, RT-9000B/LPA-9500/RCU-9310B. 

Here are some photos of the set up:
http://w2hx.com/x/Sunair/9000/

When I use the RT alone or the RT with the RCU everything seems to work fine. I can switch between 65W and 125W fine business.

When I use the amp, it appears that the amp is itself switching rapidly between 500W and some other setting. And this rapid alternating of the power level seems to be reporting back to the RT (and RCU if connected). 

A movie is worth 1000 words, so here are two videos showing the behavior.
https://www.youtube.com/watch?v=COBkUS-ZVJg
https://www.youtube.com/watch?v=Hh5jpLFying

I have attempted to press the PWR LVL button on the amp itself but that seems to have no effect. Any suggestions? I have the manuals and if no one has any quick ideas I may have to dig into them.

Thanks 
73 Eugene W2HX
PS this was also sent to the sunair yahoo group, but I never saw it come through.