Panasonic 48" LED TV, backlight on but no picture

[safesurfer65]

Hello all

Have a Panasonic 48" LED TV model no. TX-48AS640B. Just over 1 year old. When switched on the backlight comes on but no picture is displayed. Can hear the menu being navigated. Suspecting main board, any ideas ? Hope someone can help.

thanks

Mal

[truep]

Re: Panasonic 48" LED TV, backlight on but no picture

Check for voltage on both sides of the TCON fuse. It should be near one of the connectors
going to the main board. If you send a clear picture of the TCON board we should be able to point it out. (it's the one at the bottom of your picture) There should be 12V or 5V on both sides of the fuse. Some nay not have a fuse though.

[safesurfer65]

Re: Panasonic 48" LED TV, backlight on but no picture

Hi

Thanks for that. Think I identified the fuse (circled). 12v both sides !

[budm]

Re: Panasonic 48" LED TV, backlight on but no picture

Try having one ribbon cable between the T-CON and the LCD panel connected one at a time to see what you get on the screen.

[safesurfer65]

Re: Panasonic 48" LED TV, backlight on but no picture

Hi

Tried disconnecting individual and both cables from the T-con to the screen. Made no difference.

thx

[wreksta]

Re: Panasonic 48" LED TV, backlight on but no picture

Hi all been a while I too am facing this blank screen issue on same tv any info and tcon fuse tests fine

[Davi.p]

Re: Panasonic 48" LED TV, backlight on but no picture

You have lost too the warranty proof?? :-)
The defect seem sto stay on tcon, can someone pubblish a shopjimmy picture of that board? i can't connect to it.

[sordids999]

Re: Panasonic 48" LED TV, backlight on but no picture

recently done a 40 inch panasonic with bad LEDS just a thought though

[ReeceyBurger123]

Re: Panasonic 48" LED TV, backlight on but no picture

recently done a 40 inch panasonic with bad LEDS just a thought though

Backlight on no picture......

[sordids999]

Re: Panasonic 48" LED TV, backlight on but no picture

Backlight on no picture......

opps i must read more before posting

[ReeceyBurger123]

Re: Panasonic 48" LED TV, backlight on but no picture

opps i must read more before posting

Lolol

[Davi.p]

Re: Panasonic 48" LED TV, backlight on but no picture

Jesus Christ that smokes? That changes capacitors?

Also Jesus Christ chooses... PANASONIC...

[wreksta]

Re: Panasonic 48" LED TV, backlight on but no picture

Hi has anyone resolved this issue I've tried tcon and to no Avail have the new main board so will post back when fitted

[ReeceyBurger123]

Re: Panasonic 48" LED TV, backlight on but no picture

Keep us updated

[wreksta]

Re: Panasonic 48" LED TV, backlight on but no picture

well thats the main board and tcon replaced for good working ones and still nothing but a blank screen

also checked out all screen tabs etc no damage faults etc
im starting to think its the psu but nothing visual or blown

does any have a service manual or know the voltage the power board gives to main

[freakaftr8]

Re: Panasonic 48" LED TV, backlight on but no picture

Fuse on panel FRP boards?

[wreksta]

Re: Panasonic 48" LED TV, backlight on but no picture

fuse on frp where is this fuse like mate

[freakaftr8]

Re: Panasonic 48" LED TV, backlight on but no picture

Located in the long boards that are attached to the panel itself. They are concealed within the frame.

Of course this is just a hunch. I have seen panels that have fuses built on to these boards as a precautionary secondary step incase t-con fails

[Davi.p]

Re: Panasonic 48" LED TV, backlight on but no picture

Are you sure the backlight is present like OP?

[sintv]

Re: Panasonic 48" LED TV, backlight on but no picture

I recently had Vestel type 48" Toshiba with backlights ok but no video. Turned out to be the PSU though I didnt get to component level