Press and hold the button for at least 30 to 60 seconds . This drains residual electricity from the internal capacitors, clearing software glitches. Reinsert fresh batteries and test the device. Mechanical Button Release

If the light turns off, the code was accepted. Test the power button. Turn on your TV.

Using a cotton swab dipped in white vinegar, the corrosion was neutralized and scraped away until the metal shined.