Reply to post: I hear

I hear

That some TVs actually support reflashing over the (rarely used) VGA port.

Certainly some monitors have this feature and a lot of Sky boxen can be updated this way using undocumented pins on the SCART port if the firmware goes Tango Uniform.

Another often used method is to put the unit into a special flash mode using a keyed remote, sending out a sequence that is never normally seen.

Typically typing a keycode followed by the model number will do the trick and enable the hidden menu containing things like timing adjust and backlight individual brightness adjustments for LCD and convergence for CRT based units.