Light bulb problem. The operating instructions of necme360xc projector show that the red light of the projector is the light bulb indicator, and the switch status light keeps flashing because of the light bulb problem. Necme360xc projector is an educational projector produced by Nippon Electric Co., Ltd., which adopts double-layer filter screen to improve the filtering effect and ensure the smooth cooling air flow at the air inlet. The rear air intake filter adopts brand-new materials and structures, and its dustproof ability is improved by three times.