a circuit problem
As some of you know, the projector's been acting up - it has a tendency to shut down during use, and the indicator lights show some unspecified "problem in the lamp circuit". The image starts to flicker before the device fails. Turning the projector off and letting it rest a while seems to temporarily correct the problem.
We sent it in for repairs a few weeks ago; the repairman replaced the old lamp and filter, and things seemed to be working fine for a few days. Then the problem started recurring - time to shutdown was 2 hours, then 1 hour - and we sent it back to the shop. Apparently, the shop can't replicate the defect, which probably means 1) the defect is intermittent, which would be a pain in the ass, or 2) the cause of the circuit problem is outside the projector.
Can anyone offer any insights into diagnosing (2)? The projector is normally hooked up to a surge protector, but it's getting older, and has been through a few moves - any chance the protector isn't doing its job any more, and how would we diagnose it? Could it be a problem with the apartment's electrical system? It's an old building. I don't really know enough about electronics to speculate further. Help?
We sent it in for repairs a few weeks ago; the repairman replaced the old lamp and filter, and things seemed to be working fine for a few days. Then the problem started recurring - time to shutdown was 2 hours, then 1 hour - and we sent it back to the shop. Apparently, the shop can't replicate the defect, which probably means 1) the defect is intermittent, which would be a pain in the ass, or 2) the cause of the circuit problem is outside the projector.
Can anyone offer any insights into diagnosing (2)? The projector is normally hooked up to a surge protector, but it's getting older, and has been through a few moves - any chance the protector isn't doing its job any more, and how would we diagnose it? Could it be a problem with the apartment's electrical system? It's an old building. I don't really know enough about electronics to speculate further. Help?