My JVC TV model AV-29LX2 automatically switches off after about 20 seconds after start-up, the sound comes through and sometimes the picture. I then switch off at the main on/off switch and again it goes through the cycle of sound and sometimes before the picture it will again automatically switch off going into the stand-by mode.
Tags: 30, automatically, AV29LX2, JVC, model, Startup, switches, TV