¶ 1. Phenomenon Description
The touch screen doesn't light up.
¶ 2. Troubleshooting
- Check if the screen line is damaged/broken or has poor contact
- Verify if the power switch is outputting normally (through the power indicator light or by measuring the output voltage)
- Check if the motherboard is powered correctly (if possible, use a multimeter to measure the voltage at the power end of the motherboard)