Is a cable that does not conform with specifications plugged into the Audio/ Video input jack? 3. Are there signals interfering from cars or electrical appliances? 4. Is the signal too weak or are there obstacles nearby? 1. Is the brightness setting correct? 2. Are batteries dead? Are batteries dead? Dead batteries tend to become warm and should be replaced. OPTIONS AC adaptor : AD-K64/AD-K65 Car adoptor : CA-K65 Cassette connector : OS-76C AUDIO/VIDEO cord : AV-C1 Note: Some of the options list