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ost models have a self-diagnosis feature to help determine shutdown problems.
To enable this feature do the following....
1) Turn the tv on and then let it shutdown
2) Press the input and menu buttons on the front panel simultaneously and hold them in for 5 seconds
3) After 5 seconds the power LED on the front panel will blink a two digit sequence.
This will commonly be one set of blinks followed by a short pause then another set of blinks.
This will repeat around five times.
1 - 2 = no error detected
2 - 1 = X-ray protect (high voltage or beam current)
2 - 2 = Short protect (short detected - commonly caused by convergence failure - to repair this check out site for a convergence kit)
2 - 3 = Deflection protect
2 - 4 = Vertical protect
Note: A constant blink on certain models will typically be caused by a fault in the DM model. To repair this check out site a "blinking green light kit"
Does the led ever stop blinking? No ..well in that case generally this indicates a standby voltage problem...if all those voltages ok then the cuircit known as digital module is at fault. also make sure the lockout has not been activiated. i really dont think it could but to unlock hold menu button down for 10 seconds. After all that i believe it would be a bad digital module
generally this means a bad digital module.. as a techinican the first thing that we would check are what is know as standby voltages. if they were there we would replace digital module.! question. Does it blink for more than 70 seconds. This unit comes with a lockout feature. to unlock press and hold menu down for 10 seconds on front panel.