PIONEER 50" PLASMA [DISPLAY ONLY] [Seperate Tuner Type]
TV turns ON, but the screen flashes green color. A clear indication of Y-sustain board fault. Replaced, checked OK.
Pioneer 50" Plasma Y-sustain board.
SONY KDL-40V2500 LCD TV
Set turns ON and stays for a few seconds, and shuts down. Bak light inverter board fault. Internal winding short in one among the inverter transformer at the back light inverter board. Cannot detect by normal Ohms measuring techniques. Even a single turn shorts, it will put a high load at the power supply board, and protection circuit will sense it, and will shut the system OFF.
KDL 40V2500 BACK LIGHT INVERTER
There is back light. But no audio or video.
If unplug one ribbon wire to LCD panel, which goes from LCD control board, the backlight is ON. But, picture is only at the half of the screen. [Half Screen Picture].
Nothing to be checked out. Panel is faulty. [This is a common fault to most of the Sony LCD TVs].
SONY KDL-32L4000
- No power. No video. No audio. No light at its front panel.
- Further checking revealed that, there was no Data from EEPROM IC. No information at I2C bus. Clear indication of main board fault. Replaced the main board. solved the problem.
SONY KDL 32L4000 MAIN BOARD
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