PANASONIC TH-L19X10AK LCD - will not start.
just finished playing with this one.
Symptoms were, green flashing LED, endless cycling, brief flash of backlight, audible click through audio, no fault code flashed.
Headed straight for the backlighting and disconnected P6,P7 to backlight.
TV cycled on for 2-3 secs then quit with SOS1, backlight error.
Connected antenna and heard channel on next startup, shone light into LCD panel and image could be seen.
Checked topside for shorts, nothing.
Then on underside Q7801 TPC8119(TOSHIBA FET P Channel MOS Type U-MOSV) - dead short
Q7802 TPC8037 (TOSHIBA FET N Channel MOS Type U-MOSV) - checked ok
Removed both with same result. No shorts on pad locations
Scavanged a SSG4407P from a dead laptop board for Q7801 and the TV is up and running again.
Have ordered TPC8118 from RS and will replace with that but it seems fine as it is.
Power board is TNP4G457 Rev: AD Same board as in TH-L19X10MK
3728Hrs on-time, 2758 power cycles
just finished playing with this one.
Symptoms were, green flashing LED, endless cycling, brief flash of backlight, audible click through audio, no fault code flashed.
Headed straight for the backlighting and disconnected P6,P7 to backlight.
TV cycled on for 2-3 secs then quit with SOS1, backlight error.
Connected antenna and heard channel on next startup, shone light into LCD panel and image could be seen.
Checked topside for shorts, nothing.
Then on underside Q7801 TPC8119(TOSHIBA FET P Channel MOS Type U-MOSV) - dead short
Q7802 TPC8037 (TOSHIBA FET N Channel MOS Type U-MOSV) - checked ok
Removed both with same result. No shorts on pad locations
Scavanged a SSG4407P from a dead laptop board for Q7801 and the TV is up and running again.
Have ordered TPC8118 from RS and will replace with that but it seems fine as it is.
Power board is TNP4G457 Rev: AD Same board as in TH-L19X10MK
3728Hrs on-time, 2758 power cycles
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