finlux 50fme242b-t flashing backlight leds

[flocko]

Re: finlux 50fme242b-t flashing backlight leds

remove the strip and heat from the rear to remove the LEDs, you can use hot air ( Paint stripper) if you have one, an iron would be Ok as long as it was 60w+ or a hot plate . PM me with the number of LEDs you need + your address and i will send them to you

[Kingblue76]

Re: finlux 50fme242b-t flashing backlight leds

I have this TV and the back lights problem has occurred one corner of TV is in darkness and can't source replacements anywhere

[crt man]

Re: finlux 50fme242b-t flashing backlight leds

Hi All

I know this is an old thread, but I have been asked by a work
colleague to have a look at the above-mentioned set.
I know it's a backlight issue but the screen is a Vestal VES500UNVL
I have seen on E-bay these [URL="https://www.ebay.co.uk/itm/FINLUX-50FLHKR242BHC-VES500U"] for a Vestal VES500UNVA.
Are these likely to work or are they completely different for
this set and what are the pitfalls with doing one of these thanks

Alan.

[vinceroger69]

Re: finlux 50fme242b-t flashing backlight leds

the ebay link does not work

[crt man]

Re: finlux 50fme242b-t flashing backlight leds

Sorry cannot get link to work will have to copy and paste
FINLUX-50FLHKR242BHC-VES500UNVA-50INCH-7020PKG-72EA-DRIVE-CHIP-10-PIECE-KIT

[vinceroger69]

Re: finlux 50fme242b-t flashing backlight leds

I have used that seller before hes very helpful send him a message through ebay he will confirm if ok for your set i cant help regards too fitting the leds as not done this type yet myself im sure flocko or maybe diif will be able to advise you
https://www.ebay.co.uk/itm/FINLUX-50...-/332425505049

[crt man]

Re: finlux 50fme242b-t flashing backlight leds

Hi All
Can someone advise me if the above backlights are repairable
and what does it entail, there is one led out in the strip but
there are 22 pairs that are reduced in brightness out of 72.
There also seems what look like resistors blown off the board
but not sure on that, any help would be greatly appreciated.


Alan

[dick_barton]

Re: finlux 50fme242b-t flashing backlight leds

Contact Microtech AV Services and see if they can help you identify replacement leds

[crt man]

Re: finlux 50fme242b-t flashing backlight leds

I have contacted them as they have the parts available,
but I do not think I will be able to do this repair,
and have asked them if they do a repair service.

Alan

[crt man]

Re: finlux 50fme242b-t flashing backlight leds

remove the strip and heat from the rear to remove the LEDs, you can use hot air ( Paint stripper) if you have one, an iron would be Ok as long as it was 60w+ or a hot plate . PM me with the number of LEDs you need + your address and i will send them to you

Forgive my ignorance but is it the metal strip you heat,
to remove the led's?

Alan.

[flocko]

Re: finlux 50fme242b-t flashing backlight leds

alloy strip on rear of LEDs, heat until you can remove LEDs without force, replace by dropping the new LEDs on to the pads using a little flux, and heat from the rear ( make sure to have the LEDs the right way round) Good luck Flocko

[crt man]

Re: finlux 50fme242b-t flashing backlight leds

alloy strip on rear of LEDs, heat until you can remove LEDs without force, replace by dropping the new LEDs on to the pads using a little flux, and heat from the rear ( make sure to have the LEDs the right way round) Good luck Flocko

There is some that are not at the same brightness as others, do they need replacing as well.

Thanks
Alan

[flocko]

Re: finlux 50fme242b-t flashing backlight leds

There are two LEDs side by side in one case, if only one is working it will show as not being as bright, this is why using 4.5v to test them is useful as they do not burn your eyes out at this voltage, and you can see if only one half of the two are working (although they are working the shorted side will not lite ). If you have a lot of LEDs like these in any of the strings I would replace them as they will fail in time

[crt man]

Re: finlux 50fme242b-t flashing backlight leds

What I mean is there is one case where one LED has failed,
there are 22 working with two LED'S but not as bright as the others.

hth

[vinceroger69]

Re: finlux 50fme242b-t flashing backlight leds

The part where you say looks likes blown resistors on the board is that the area where the leds are less bright?

[crt man]

Re: finlux 50fme242b-t flashing backlight leds

In the picture P#27 shows one of the area's where these have come from I
am not sure what they are as it does not appear to be a circuit.
There are five of these along the length of the backlight.
The dimmer ones run the whole length of the strip.

[dick_barton]

Re: finlux 50fme242b-t flashing backlight leds

There are five of these along the length of the backlight.

I wonder if they are protection zener diodes.

[crt man]

Re: finlux 50fme242b-t flashing backlight leds

I wonder if they are protection zener diodes.

Well when I say there are five, there was five (as they have all come off).

[flocko]

Re: finlux 50fme242b-t flashing backlight leds

your problem could be with the four string driver IC (MP3394S), take the time to look at its data and how it works, as for the crispy black parts they were diodes that stop the strings back flowing, but should work without them as the LEDs will do the same job