the usb stick from Toshiba was delivered yesterday, and it did the same thing, 3 quick flashes, and one long flash then nothing. I called tech support, and the rep had me look athe the tag on the set for the model #, 40RV525R on the tag. Then he had me look in the Information menu, 40RV525RZ.
The RZ is the latest revision to the set, and the firmware is different, that is why the firmware update would not work. I was told Toshiba is working on updating the firmware for all their sets, and an update would be ready for this set soon.
For everyone who has problems with the update, check the model # on the information screen, as this was the only indication my set was a 40RV525RZ and not a 40RV525R.