Won't turn on for several tries

the power supply is faulty and will need replacing

turn on manually your set (tv), push the code button on your remote control until led light, release the button, the led still ligth. push the tv button one pulse, push the power button several times until tv turn off. when this happen push enter button... try turn on the tv with remote control.

1. Push the "Power" switch downward into the "Hold" position.
2. Press and hold the "Menu" and "Record" buttons at the same time until the device resets.
3. Push the "Power" switch upward all the way to turn it back on.
OR
1. Grab a steady hold around the device.
2. Push the "Power" upward and hold it there until it powers off.
3. Power the device back on by releasing the power switch and then pushing it upward again.
OR
1. Unscrew the screws on the back of the device (or simply push the lid off if it is a model without screws.)
2. Take out the batteries from the slot and wait until the screen goes black.
3. Insert the batteries the same way they were mounted and attached the lid again.
4. Push the power switch upward to turn on the device.

continue to push power button until light turns green. verie rate of push and hold

hold power and tv button same time
until power buttton stays on then
slowly hit power button until tv turns off then hit stop button and tv will work with remote

30 YR SERVICE TECH.
YOUR UNIT IS EXPERIENCING A POWER SUPPLY FAILURE.(INTERNALLY)
TAKE TO A SONY AUTHORIZED SERVICER.

The power supply most likely failed on your LCD.
How old is your LCD?

I HAVE SAME PROBLEM. AFTER I REPLACED MY DEAD BATTERY MY AIWA CDC-X304 IS STUCK IN THE DEMO MODE. ONLY CD WORKS BUT ALL BUTTONS ON FACING DO NOT RESPOND. ANY SUGGESTIONS HOW TO RESET.

Solder bad connections vertical output IC......requires chassis
to be pulled....................T.