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TV backlight issue with Vestel power supply board

ph.bgn Posted messages 4 Status Membre -  
txiki Posted messages 6514 Registration date   Status Contributeur Last intervention   -

Hello, could you help me?

I have a problem with my TV.

When I turn it on, the backlight flashes and then nothing.

I have sound and when I use my phone's flash, I can see an image.

I tested the output to the backlight (on the power board) at startup and I have 25 volts, then a decrease until it reaches 0.

Have you ever encountered this problem with a Vestel 17IPS62 board for a HighOne TV?

Thank you in advance.

4 réponses

Réponse 1 / 4
txiki Posted messages 6514 Registration date   Status Contributeur Last intervention   611
 

Hello ph.bgn,

Aside from replacing the power board, I don't see any other solutions (I don't think you can repair it at home).

It can be found as a spare part, and your ability to do so.

Best regards!
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Réponse 2 / 4
ph.bgn Posted messages 4 Status Membre
 

but I have voltage and I have an image, sound, and indicators so I have electricity

on the board I tested the capacitors and they are fine

I have a doubt about the LEDs but they flash on startup
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txiki Posted messages 6514 Registration date   Status Contributeur Last intervention   611
 

"My backlight flashes and then nothing": that's exactly the problem! The voltage is not regulated, it cuts out.

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Réponse 3 / 4
ph.bgn Posted messages 4 Status Membre
 

Very well! And which component on the board do you have in mind?

It's a Vestel 17IPS62
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txiki Posted messages 6514 Registration date   Status Contributeur Last intervention   611
 

Not at all (unless you're an electronics engineer...).
Replace the card.

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Réponse 4 / 4
ph.bgn Posted messages 4 Status Membre
 

I prefer to change a capacitor, a resistor at 30 cents rather than the whole board for 30€.

But since I'm stuck on the diagnosis of the board because everything seems fine, I thought that someone might know the exact fault (which is apparently common).
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txiki Posted messages 6514 Registration date   Status Contributeur Last intervention   611
 

Very well! But without the diagram in front of me, it's going to be tough....

I'm passing the torch.

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