Unfortunately this means there is a power supply failure. Unless your unit is still under warranty, this means you will take it to a repair shop for diagnosis (probably around $40) then get the call to tell you that the repairs will cost you $150 - @200, more than the price of a new unit. Mine lasted about 1 1/2 years but only had about 15 - 20 hours use. This is apparently a fairly common problem for this unit. Unless it is under warranty, cut your losses and opt for a new, reliable unit. Good luck.