Projector has specks (shadows) on picture

[Mark H.]

I have an older InFocus projector I picked up a while ago. There are
lots of specks in the picture, shadows of something, all to one side.

I don't think it's dust, or perhaps it is some kind of dirt/dust
INSIDE the lens where it cannot be wiped clean.

Anyway, if anyone knows how I might be able to find the source of the
problem as well as any tips for solving it, please respond.

Thanks.

[rdclark]

Mark H. wrote:
> I have an older InFocus projector I picked up a while ago. There are
> lots of specks in the picture, shadows of something, all to one side.
>
> I don't think it's dust, or perhaps it is some kind of dirt/dust
> INSIDE the lens where it cannot be wiped clean.
>
> Anyway, if anyone knows how I might be able to find the source of the
> problem as well as any tips for solving it, please respond.

It's almost certainly dust on the LCD panel. When it gets this bad it's
often a good indication that the projector hasn't been maintained,
particularly frequent cleaning of the dust filter. Projectors with a
lot of dirt inside are also frequently prone to burned out LCDs, caused
by heat build-up from the clogged filters.

You can try opening it up and blowing out the dust, but if the LCD
becomes misaligned with the lens/prism/reflector you may end up needing
it serviced.

RichC