"shy" display on HK receiver

"shy" display on HK receiver (SOLVED)

I recently got a Harmon Kardon AVR 1435 receiver. Everything seems to function OK, radio / cd player etc, although I don't have all the speakers hooked up. As can be seen the receiver display fades quickly about 3 sec after it turns on. When the display is off every thing still works and the display "wakes up" again when I rotate the knob or push a button on the remote. About 3 secs later the display falls to sleep again. As can be seen when the display goes blank, the blue light on the volume knob also goes to sleep.

Is this something a non technical diy person fix or will I have to bear with this?
 

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