Question about InFocus Proxima DP9270 Multimedia Projector
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Posted on Jan 02, 2017
I encounter like this problem before only i change bulb and clean the circuit board including the fan and do resoldering work's in the circuit board due cold solder and then its fine.I think this desame to your problem too.Cold solder issues - each
component is soldered into small
holes on the printed circuit board which in turn connects said
component to the
other components. Due to time, heat, use, some solder joints would be
or loose. It is possible that the cold solder is still minimally
(hanging by a thread). When the unit turns on heat would be
generated which would
be sufficient to further loosen up the solder joint to the point it no
provides electrical contact. Jarring the unit creates movement inside
re establish the contact, sometime good enough sometimes not enough.
Again, since the unit still operates (sometimes) then it is highly probable that there are no defective components. As you have surmised, it is possibly a loose connection, solder joints are "connections" except that molten soldering lead is used to attach/connect the component to the board, "loose connection" in this sense is equal to "cold solder".
Again on the assumption of no defective parts, then seeking a more experienced buddy for the soldering might be to your advantage. This is of course in addition to the possible electrical hazards when repairing....
Posted on Jul 30, 2008
are any leds blinking on the top? check all if the fans and the lamp. if you see dark spots or bulges in the lamp, replace it. if there is still an issue, replace the ballast.
Posted on Nov 06, 2009
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