Some types of LED TVs start after many attempts before the flash is permanently altered. But it can also sometimes be recovered. Alteration of these SPI flash memory accounts for about 40% of all LED TV malfunctions. There are many Flash manufacturers: Winbond, Gigadevice, Spansion, Mxic and the list goes on, but the memories are altered after a while, and besides, it does not matter the manufacturer of the LED TVs.
On the same programmer if a memory can not be copied at the first attempt, it can never be recovered. However loaded with a correct software becomes fully functional.
As far as I know, the content of these flash SPIs is transferred to another memory when the device is powered on. After that, it is only sometimes accessed. In conclusion, it is not required at all times. Or maybe it is not.