Toshiba 40L1533DB TV Backlight keeps shutting off.
I recently purchased a second hand Toshiba 40L1533DB TV, when powered on initially all is fine, however the TV’s backlight turns off after some time. Interestingly, depending on the backlight mode, the time taken for the TV to turn of varies. On Low mode the TV’s backlight stays on for about an hour, but on medium or high this time is less.
After turning the TV back on immediately after the failure, the backlight goes out again much sooner.
I am wondering what area of the TV is at fault, perhaps the Power Supply board or the LED backlights themselves. Obviously if the LED strips were at fault themselves it would be a much more challenging repair.
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2 opmerkingen
@samhodgson does the power board look like it got/gets hot on the isolated transformer side? May just be the picture but it sure looks like it....Take a picture of the underside as well since that is where the boost converter and switching mosfet are located. Let's see....
door oldturkey03
Hi there I have 55l7453D toshiba when turn on tv get sound no pic when bang on tv in places the backlights come back on and it works fine for hours but soon as I turn it of again on standby I have to do it again knock tv and backlights come back on again can anyway tell me what's happening and how to fix it
door ste2u