It doesn't seem to need a bulb replacement, the Temperature LED is on solid all the time, won't start up.
Model:
Optoma W311 Full 3D WXGA 3200 Lumen DLP Multimedia Projector
Link to Manual: https://www.optoma.co.uk/uploads/manuals/W311-M-en.pdf
I tried Portland Printer Place - they won't touch it.