My box died last night, red dot in corner of display. I went to maplins and bought a new capacitor.
Quite a simple job, I did cheat slightly as I cut the old cap off leaving the old legs stand proud of the pcb. I just soldered the new cap to the legs of the old cap.
Fired up straight away, and running like dream again
Right remove any usb drives that you may have inserted and power off and on.
Still the same after this then you have to try reflashing.