42pfl8404h/12 no backlight, sound is OK

[domix]

Hello,
Tv suddenly goes black, when tv was watched.
Sound is ok, but no picture. I turn off and on, and sound is ok but ni picture.

If i light it with flashlight very close in the screen i see picture. So backlight it not working. Is there any way to solve this, but not to buy a new board?

Thanks

[trunks81]

Re: 42pfl8404h/12 no backlight, sound is OK

Can you post an photo of the powersupply board ?

[neilc6]

Re: 42pfl8404h/12 no backlight, sound is OK

90% of the time if you have no backlights on a LED TV, you have bad backlights.

[budm]

Re: 42pfl8404h/12 no backlight, sound is OK

Show us the pictures of the back side of the TV showing all the boards, and then good clear straight shots of the whole power supply board.
What Voltage measurement have you done so far?

[trunks81]

Re: 42pfl8404h/12 no backlight, sound is OK

this isnt a led tv but an CCFL, Most common fault on these boards are the blue caps at the inverter

[domix]

Re: 42pfl8404h/12 no backlight, sound is OK

Trunks81 you have right. I found this 2 blue little buddy
I will replace them. It is good to replace all 4 of them?
What is the text on this broken one? I cant read it, know everyone?

Thanks

[domix]

Re: 42pfl8404h/12 no backlight, sound is OK

I found it, this is might be okey

https://www.ebay.com/itm/Netzteil-Re...-/262485024936

[trunks81]

Re: 42pfl8404h/12 no backlight, sound is OK

if iam not wrong it is 2x22 and 2x33 you can read the values on the side that is not broken.
Better to replace them all. Also they are 5kv you should replace them with 6kv

[domix]

Re: 42pfl8404h/12 no backlight, sound is OK

It is 33 6kv like on that ebay link.
I have a local store with electronic parts, they only have all this values 33pF and 22pF, but only 5KV, it is okey if i read 6KV on old ones ?

[trunks81]

Re: 42pfl8404h/12 no backlight, sound is OK

no you need to replace them with 6KV