OEM BL-FU310D/SP.70B01GC01 Lampada Lampadina Originale con Alloggiamento per Proiettori Optoma
Optoma EH490 EH502 EH504 EH504WIFI EW504 W504 W490 W502 X502. The projection screen appears yellowish/blueish/greenish. If the overall projection screen is blurred due to insufficient brightness, it is a bulb problem.