Tv video in Ktv private rooms is often unplugged and plugged in with blue screen video cable.

1. See if there is any sound; A sound indicates that the TV signal is normal. Check for improper adjustment or TV malfunction. No sound means that the TV signal may not come in.

2. See if there is snow on the blue screen; Snowflakes show that TV is not bad.

3. No snowflake black screen, no sound, see if the power indicator light is on; The lighting is a problem with the TV. If it doesn't light up, see if there is any problem with the external power supply. Eliminating the power problem is a TV problem.

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