Samsung UN40F6400 standby LED blink wont turn ON
Its time to get expert help to fix my TV as its almost dead !!!
Its Samsung UN40F6400 and power board BN44-00622D
The problem is - When power up the TV - standby LED blink twice for 5 Times and relay click but not ON and cycle continue...
Based on advise from other thread on this forum and tested the below.
1. Disconnected Main board cable 20Pins (CNM803)
> LED backlight ON for half of the screen and half of screen flicker. Tear down the LCD panel and diffuser, found only top 3 Strip light UP and bottom 4 strips (2x2) flicker. So, removed the top 3 and swapped with bottom 4 LEDs but still top 3 is UP good and bottom same flicker.
Hope the LED strips are found to be good - Please concure.
2. Voltage measurement without Main board and LED panel connection
Power supply @ CNM803
OD On/Off - 3v
B13V - 13v
B5v - 5v
DIM1,2,3,4 - 3V
BLU on/off - 5v
Power On/off - 3v
LED Driver - Legend
Ch 2,34 - 120v
CM851/CNM852 - 46v/67v
CNM853 - 17v/35v
Measurement without LED panel connection
Ch 1 - 70V (c9106)
Ch 2,3,4 - 150v (c9206/c9306/c9406)
Measurement with LED connection
Ch 1 - 44V (c9106)
Ch 2,3,4 - 85v (c9206/c9306/c9406)
HOT Caps reading (with/without LED)
CP810S - 305v / 396V
CP814S - 305v / 396Vc
anyone has schematics of BN44-0622D ?
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