The projector in position #8, had his lamp exchanged! The procedure involved accidentally braking a handle of the used 1772-hour light bulb, but resulted in a successful operation!
To take the cover out, one needs to unscrew a special breed of Philips-compatible screws, similar to one-way only, that are meant to make it more difficult to loosen than to tighten them. I wanted to write here a complaint about this, however I think I understand and agree with the safety of putting such a screw there.. I will probably have to change a few more light bulbs in order to write about it..
The reason behind changing the 1772h lamp was the projector consistently shutting down after only some 30 seconds of use. The bulb's life time should be quite higher, around 2500h..
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