Pular para o conteúdo principal

Repair guides and support for your Philips TV.

38 Perguntas Visualizar todos

Picture but no backlight

Hey guys,

I recently bought a tv which had no backlight for 20 euros. I changed the backlights and the backlight inverter (which i thought they’re not in lcd led tv’s) but still the backlight doesn’t come on.

If i look at the voltages that go to the inverter board they are okay. But the inverter board gives for under a second a 94v to the backlight(to short to turn them on) and then goes to 0v.

If I understand correctly, does this mean the mainboard is not telling the inverter to come on? And if so is this fixable by resoldering a resistor or chip to get it working?

Update (05/27/2019)

The exact model is: 40PFL3208H/12.

Responder a esta pergunta Também tenho esse problema

Esta é uma boa pergunta?

Pontuação 0
Adicionar um comentário

2 Soluções

Resposta Mais Útil


since you already replaced the backlight and the LED board you do need to check the main board. It is usually the main board that tells the power board to turn the backlight on. Let us know the exact model of your TV.

Esta resposta foi útil?

Pontuação 1
Adicionar um comentário

Without seeing the TV and doing a diagnostic myself, I can say that generally, backlight issues are caused by either: backlights and/or power board (and backlight board if the TV has one). If your backlight board plugs into the main board directly (rather than the power board) then of course anything between where it plugs into and the power board can also be the issue, but next step based on what you did would be to look into the power board.

Esta resposta foi útil?

Pontuação 0
Adicionar um comentário

Adicionar a sua resposta

Jelle Algra será eternamente grato(a).
Visualizar Estatísticas:

Últimas 24 horas: 0

Últimos 7 dias: 2

Últimos 30 dias: 7

Todo: 55