My '07 LR3 has been displaying it on and off the past 15 months I've owned it. It's the (non-navi) 6-disc/am/fm HK Radio. I installed a new $260 AGM Interstate MTX battery months ago and that hasn't solved it. I surprisingly can't find anything about this online either. It's progressively gotten worse and now the radio just loses power 70-80% of the time. All other climate control panel works fine. Just the radio clicks on randomly at times, plays whatever CD's in the changer for 10-20 secs then I get the Temp Shutdown message and it goes off. I also replaced the Solar Sensor in the center of the dash last week with a new one and that didn't work either.

Possibly time for a new underseat Amp?