Try turning it off and unplugging it for a few minutes and then plug it in and start it up again. Surround processors are basically PCs and sometimes benefit from a rebooting process.
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iv had this exact same problem myself and im pretty sure i know your available options;
1)send the unit to harman to repair (the problem is that the 3 orange displays have become spoilt or the display board is spoilt.)
2) if you want , you can source the osram made displays from somewhere(you will have to open them), they should be 60 usd per 3 around.
and install yourself.
good luck and i suggest, in the furure, to make sure you always use the front power switch carefully, and not to switch them on/off repeatdly, as this can short the board o the display, in my opinion.