Why wont my digital tv work now?

External antenna is not adequate. Need more and bigger antennas for digital TVs. Also, several BAD problems with digital TVs - including weaker signal, picky signal, inability to use in a moving vehicle (kids can no longer watch TV while moving from place to place). More expensive receivers, not normally useable in remote places (like you could with analogue).

Rarely, two or 3 antennas on a vehicle will allow for some reception in a slow-moving vehicle - otherwise, portable digital TVs are useless.