Posts: 247
From: St. Louis, Missouri USA
Registered: Dec 2009
posted July 26, 2010 09:41 PM
When you buy a 30 year old unused projection bulb with an intact filament that will not light (contact cleaned)...what has happened....vacuum seal gone?
Posts: 118
From: Leoben, Austria
Registered: Apr 2009
posted July 27, 2010 01:06 AM
Happened to me as well. The only explanation would be that the wire inside the cement (between connection pins and filament) is not intact anymore.
Posts: 2941
From: Croydon, London, UK
Registered: Aug 2004
posted July 27, 2010 11:44 AM
Unlikely to be the explanation, but if the pins are extremely tarnished, you could try cleaning them with a sharp knife or emery paper, etc.
posted July 27, 2010 07:51 PM
I have the same issue -- an Elmo EFR that came with a projector I got last year. It is not burnt out -- I just can't throw it away even though it won't light up. I've cleaned the pins with some alcohol to remove the blackness but no luck.
Posts: 247
From: St. Louis, Missouri USA
Registered: Dec 2009
posted July 27, 2010 08:01 PM
The bulb is an incandescent CXL...it would not light up in one projector which had a working bulb....but when I tried it another projector it did light. (Just made a note on its box). The one projector has a cleaner contact (it looks less tarnished) ?