Share: TCL LCD TV L42P21FBD irregular gray screen with sound accompanying sound after a few minutes of standby - Appliances

Car Audio Crystal 3.2*2.5mm 3225 24M (24.000MHZ) 20PF 10PPM 20PPM 30PPM

Received a TCL42 吋 LCD TV viewing process irregular gray screen with sound for a few minutes into standby, when the fault occurs with strong light to illuminate the screen with images, obviously backlight failure, the offer yellow green palm customers promised to repair, open the case Check that the backlight driver board has two sets of backlight output. When the fault occurs, the right side of the screen flashes and flashes. One set of backlight voltage is unstable, the other group is stable, and the other two groups are 24V. It is suspected to be a backlight problem. The backlight is exchanged and exchanged, and then flashes to the left and then goes to the protection standby. It is determined that the fault is on the backlight driver board, and the backlight chip MAP3204 is replaced, and the power failure test machine no longer appears.