125.3 No DisplayReplace main boardReplace the power boardCN41637/38/39/40= 12V?Replace the PanelNo display(LED No power)Replace the main boardCheck the backlight is“On”?Check the LVDS cableReinsert or replace theLVDS cableReplace the main boardReplace the PanelNoYesYes NoYesNoNoYesYesNoYesNoPower boardCN921 Pin 1/2/3/4/5=24VCN922 Pin 1/2/3/4/5=24VCN926 Pin 5/6/7=24VCN925 Pin 4/5/6=12VCheck TV is under control and poweron/off by remote control andpower key?CN422 Pin 13/14 =5VCN405 Pin 1/2/3 =12V?CN405 Pin 5/6/7 =24V?

Panasonic TH-55LFV50U Service Manual

TH-55LFV50U

Important Safety Instructions

FCC STATEMENT

Safety Precautions

Maintenance

Accessories

VESA Mounting

Parts and Functions

Input/Output Terminals

Connections

DVD/VCR/VCD Connection

using hdmi video input

PC Connection

using dvi input

External Audio Connection

SERIAL Terminals Connection

Daisy-chain Connection

Using Network Function

OSD Menu Setup for Network Connection

Using Web Browser Control

Access from Web Browser

On-Screen Display Menu

screen menu

configuration1 menu

configuration3 menu

advanced option menu

Input Mode

Cleaning and Troubleshooting

Troubleshooting

Technical Specifications