The main unit appears to have no power, yet it emits a sound when the touchscreen is tapped.
The main unit appears to have no power, yet it emits a sound when the touchscreen is tapped.
Ensure the LCD screen and backlight are not damaged. Check for liquid damage around the backlight ribbon cable, and inspect the LCD and LCD connector for damage.
Check for short circuits or damage around the LCD driver located to the left of the LCD connector.
