Lenovo
IdeaCentre AIO 3 24
- Issue
- Screen completely dark but faint image visible under flashlight. System running fine — audio and USB all working.
- Solution
- Diagnosed failed LED backlight driver board. Replaced driver IC and tested backlight uniformity across all zones. Full brightness restored.
Technician's note
Backlight driver MOSFET shorted due to power surge. Recommended surge protector for prevention.
- Lenovo
- All-in-One
- Backlight



