Check the high voltage circuit on the board that has the 120 volts input. The high voltage should be close to 400 volts - nothing less than 390 volts. The capacitor is failing to hold the voltage and needs to be replaced.
SOURCE: LC-65D64U Sharp Aquos
Call sharp back again and tell them you first want to register for aquos advantage program, which is free. By doing that your service will go much quicker with them. You then tell them that you want to get set up for service. They will have one of their authorized professionals come and fix your tv in a matter of days. If their tech cannot fix it, they will replace your tv free of charge as long as you are within your warranty.
In most cases, you can reset the TV by leaving it unplugged for 30mins.
If this doesn't work, I believe the circuit board that supplies power to the screen maybe bad. They call this board a backlight inverter board. It would most likely cost more to repair than replace the TV .
SOURCE: sharp LC-26d4u tv won't turn on/power light is off
Check ur power source,unplug replug if not work,Ur tv power board ic inverter it dead needed to be change.
SOURCE: Sharp LC-37SH12U LCD TV is 20 months old and would not power on
Your power supply unit needs servicing on some part replacements. bad capacitors, voltage regulators, hi-watt resistors,....etc
SOURCE: Sharp 60" LCD Model LC-65D64U.
Does the blinking pause for a short time after blinking a certain number of times? Just checking whether the self-test diagnosis is able to detect the source of the problem.
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