backlight

For my assignment, I need to create a Proteus 8 schematic showing Arduino Uno → PCF8574(I2C backpack) → LM016L LCD connections using I2C. It wasn't too hard to implement basic LCD control (VSS/VDD/VEE/RS/RW/E/D0-D7 → P0-P2,P4-P7). In internet tutorials it typically looks like this: (SCL and...

I'm trying to troubleshoot the above scope which has a dim screen and loud high pitched whistling when on. Would a faulty backlight cause this whistling or the drive circuitry?

Are reflective foils in lcd TV's made of aluminium, or at least are there any available tv models that uses them?

Hello everyone, as the title mentioned i own a Casio Fx Cg-20 which i use in my classes and it's backlight is not working. The screen itself is working as i can see it working with enough ambient light. The brightness setting is obviously useless here. Batteries are fresh too. Does anyone have...