DAB makes a high pitched tone?

Over some months, my DAB radio (also an ipod docking station) started making a high pitched tone for about 5-10 minutes before the radio came on...the time for the radio to come on got longer and longer day by day and now I just get a high pitched tone when I switch it on. The display doesn't show anything either, just the power on light is blue...

Has my DAB radop/docking station died a death or can this be repaired?