⒈ Issues related to optical components ‌

⑴ Aging/color deviation of liquid crystal panel (LCD) ‌

Phenomenon ‌ : Yellowish, uneven or bluish-purple patches appear in the picture.
Cause ‌ : The LCD panel ages due to prolonged use, or the red polarizer is damaged (needs to be replaced).
Typical case ‌ : A user reported that the picture color shifted half an hour after startup and needed to return to the factory for optical component replacement.


⑵ Lens fogging and dirt ‌

Phenomenon ‌ : In winter, the startup screen is blurry and it takes more than half an hour to become clear.
Reason ‌ : The temperature difference between hot and cold causes condensation on the lens (common in LCD models); Dust adhesion aggravates the pollution of the optical path.

 2. Temperature, humidity and environmental adaptability issues ‌

⑴ Heat dissipation failure ‌

Phenomenon ‌ : Frequent automatic shutdowns during operation, and the protection is triggered again shortly after a restart.
Cause ‌ : Reduced heat dissipation efficiency due to dust accumulation in the fan, or false alarm from the thermal protection sensor (the heat dissipation module needs to be cleaned or replaced).

⑵ Humidity sensitive fault ‌

Phenomenon ‌ : Difficulty in starting up or abnormal screen display in damp conditions.
Reason ‌ : The LCD panel is not well sealed, and moisture intrusion affects the light transmittance of the optical components.