A1: ● After reattaching the back cover, the ROG Ally requires activation through a power adapter to turn on. ● Ensure that the included black light-blocking sticker is properly adhered to the surface of the ROG Ally's light-sensitive component.→ ● The issue may be due to inadequate electrostatic protection measures or damage to the device's components during disassembly. It is recommended to contact a repair technician for an assessment.