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SONY LCD TV KDL-42V4100    
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Joined: 01 May 2009
Posts: 1
Location: USA

PostPosted: Fri May 01, 2009 3:18 pm    Post subject: SONY LCD TV KDL-42V4100 Reply with quote


I'm trying to repair a Sony LCD TV KDL-42V4100 Chassi EX1. Currently I have a black screen in front of me: no image at all & no OSD, I also have audio from a tuned channel. The inverter is working well since the backlight tubes are turned on.

There is a USB port in the back that is supposed to be used only 4 servicing but no sevice available and I really don't have a clue of what to do with it or if I have to flash or upgrade software or anything else.

Cannot find Service manuals or tech info all over the Web.

Any assistance will be highly appreciated. Thanks

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Joined: 28 Dec 2006
Posts: 2879
Location: Overland Park, KS

PostPosted: Sat May 02, 2009 10:36 pm    Post subject: Reply with quote

I'm also interested to see what anyone has to say about this one. Is this just an inverter problem?
Jesse Mack

Joined: 22 May 2008
Posts: 600
Location: The Last Frontier

PostPosted: Mon May 04, 2009 2:43 pm    Post subject: Reply with quote

Enter the Self Diagnostic Mode (Start with power off (standby mode)) Select:: Display--5---volume down in that order on the remote.

Diagnostic Item Description----Number of times STANDBY lamp flashes-------- Possible Location.

Main Power-----------------------2 times-------------------------------------Power Supply Board
DC Alert---------------------------3 times----------------------------------------Main Board, Power Supply Board
Panel Alert-----------------------5 times-----------------------------------------LCD Panel
Backlight-------------------------6 times-----------------------------------------Power Supply Board, LCD Panel
Temp-----------------------------7 times------------------------------------------Main Board
SP Prot---------------------------8 times------------------------------------------Main B Board
Trident IC------------------------11 times----------------------------------------Main Board
TCON Error----------------------12 times------------------------------------------LCD Panel
Backlight Balance---------------13 times----------------------------------------LCD Panel
HFR Error------------------------14 times-----------------------------------------LCD Panel

Hope this helps

Jesse Mack

Joined: 22 May 2008
Posts: 600
Location: The Last Frontier

PostPosted: Wed May 06, 2009 12:19 pm    Post subject: Reply with quote

Sorry, I forgot one step.

The sequence is:
On the remote: Display---5---Volume Down---Power

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