SHARP LC32P55E: Red LED appears for a seconds, relay clicks then dead: Protection Mode? _ After Power Board Replacement

Sharp LC32P55E: Red LED appears for a seconds, relay clicks then dead.

Symptom: Red LED appears for a seconds, Relay Clicks then dead.
The resistor R751 blown. Replaced IC704 & R751.

Sharp: The sharp LCD TV under Protection Mode?

Normally, the technician will first check the inverter board, after that Power Board, if still can't get any result, then  will check the Signal board or Main board. 

Even you change the inverter or PSU board, the TV still under protection mode. Sometime, the TV might have been fixed by the repairer,  but TV still remember the protection mode inside the memory. 

So, now you need to know how to clear this protection inside the memory.

"Press & hold the Channel Down & Volume Up buttons on the Front Panel of the TV simultaneously. "

The  protection error will be cleared  & solve the  problem.