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I advise you first of all, if the interior of the TV is at all dusty or dirty, to re-seat (with the power Off, of course! and with the TV unplugged from the power) every connector, after doing a thorough cleaning out of the interior with e.g. compressed air.
Try it again, note any remaining symptoms, or any flash codes on the front lights, carefully.
(The lamp not turning On does not mean the lamp is the problem. Rather, it's probably either an initialization problem, in some circuit board, or else a power supply problem.)