LOUTOC V13H010L77 Replacement Projector Lamp for Epson Elplp77 4550 4650 1975W 4750W 4770W G5910 HC 1440 PC 1985 EB-1970W 1980WU 1985WU 4855WU 4950WU 4955WU (lamp with housing) For Projector: for Epson Elplp77 V13H010L77 1975W 1980WU 1985WU 4650 4750W 4770W 4855WU G5910 HC 1440 PC 1985 EB-1970W 1975W 1980WU 1985WU 4550 4650 4750W 4770W 4850WU 4855WU 4950WU 4955WU H543C H544C H545C H545M H546C H546M H563C Projector Installation: 1 Turn off the projector and disconnect the power cord. 2 Let the projector cool for at least 30 minutes. 3 Use a screwdriver to remove the screw from the cover. 4 Remove the cover and the lamp protection film. 5 Loose the screws of the lamp. 6 Pull our the lamp module by lifting the handle. 7 Replace the new lamp, then tighten back the screws. 8 Reinstall the lamp cover and reset the lamp usage time.