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Crumbtrail TV Forums: TV Equipment: TV Repair Forum:
LG LCD 47LN575V NO PICTURE BUT SOUND

 
 


davidac
New User

Oct 6, 2015, 9:00 PM

Post #1 of 6 (5122 views)
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LG LCD 47LN575V NO PICTURE BUT SOUND Can't Post
Hi. Only 15 months old. Picture went but was getting sound. Checked 'flashlight test' in dark room and could see the picture barley. Purchased second hand T-CON and Power Board and replaced them. Worked perfect for 2 hours but it went again.
Any help would be appreciated.



jts1957
Veteran


Oct 6, 2015, 11:35 PM

Post #2 of 6 (5114 views)
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Re: [davidac] LG LCD 47LN575V NO PICTURE BUT SOUND [In reply to] Can't Post
In Reply To
Hi. Only 15 months old. Picture went but was getting sound. Checked 'flashlight test' in dark room and could see the picture barley. Purchased second hand T-CON and Power Board and replaced them. Worked perfect for 2 hours but it went again.
Any help would be appreciated.
Get some beef, spices, various veggies and make beef barley soup.

Board numbers may help. Power & Main especially.


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Location: Far, Far Away


davidac
New User

Oct 7, 2015, 1:06 AM

Post #3 of 6 (5106 views)
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Re: [jts1957] LG LCD 47LN575V NO PICTURE BUT SOUND [In reply to] Can't Post
Hi

LG 47LN575V Power Supply Board EAX64905501 (2.2)
T.CON BOARD MODEL NO : P/N:6870C-0444A
Both replaced (second hand)

LG-47LN575V-LCD-TV-MAIN-AV-BOARD-EAX64797004-1-1
Not yet replaced

Cheers


jts1957
Veteran


Oct 7, 2015, 1:13 AM

Post #4 of 6 (5104 views)
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Re: [davidac] LG LCD 47LN575V NO PICTURE BUT SOUND [In reply to] Can't Post
PLEASE NOTE: Models that use this power supply are also HIGHLY susceptible to LED failure. What may seem like a power supply failure may be caused by the failure of one or more LEDs inside the panel (screen).


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Location: Far, Far Away


davidac
New User

Oct 8, 2015, 10:48 PM

Post #5 of 6 (5084 views)
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Re: [jts1957] LG LCD 47LN575V NO PICTURE BUT SOUND [In reply to] Can't Post
Hi. Using flashlight I can see the picture.
Are there separate LED invertor boards? Not obvious when I took back cover off?

I also only get the backlight powering up for 1 or 2 secs then nothing.

Is it worth while looking at another board replacement?

Cheers


(This post was edited by davidac on Oct 8, 2015, 11:06 PM)


jts1957
Veteran


Oct 9, 2015, 2:00 AM

Post #6 of 6 (5080 views)
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Re: [davidac] LG LCD 47LN575V NO PICTURE BUT SOUND [In reply to] Can't Post
Inside panel assembly. Should be along lines of: http://www.shopjimmy.com/...2-strips-1-board.htm

Since they are wired in series ... all it takes is a single bulb not to light and they ALL stop lighting.


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Location: Far, Far Away

(This post was edited by jts1957 on Oct 9, 2015, 2:01 AM)

 
 
 


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