Read Sharp LC-39LD145K (serv.man6) Technical Bulletin online
If you try to update the normal firmware, the firmware update proceeds (Flashing LED)
but the Television never turns on.
there is a 2 step recovery process:
and U12. Refer to the model service manual for the correct part number.
When ordering the memory, ensure you provide parts centre with the 2 x serial
number located on the rating plate of the affected unit. If you fail to provide both serial
numbers, you will receive the incorrect part.