Introduction
This guide demonstrates how to replace an Epson PowerLite 77c (V11H254220) lamp, part number V13H010L41. The projection lamp is the heart of a projector, as it lights and displays images. If you're experiencing issues involving a dim image, or if the lamp isn't illuminating at all when the projector is on, it's probably time to replace the lamp. Issues with the lamp are typically indicated by a flashing orange light under the power button.
There is mercury in the device’s lamp; therefore, there are state and local regulations regarding disposal and recycling. Do not discard in the trashcan.
Before removing the lamp, be sure power down and unplug the device; allow it to fully cool before beginning.
Tools
Parts
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            Use a Phillips #0 screwdriver to remove the one 5.0 mm screw from the lamp cover on the back of the device. 
 
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            Loosen the two 5.0 mm captive screws with a Phillips #0 screwdriver. 
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            Pinch the two release triggers to unlatch the lamp housing, and lift upward to remove it. 
 
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To reassemble your device, follow these instructions in reverse order.