HIT: overhead problems

["R. McAtee" <rmcatee@hsadmin.kv.k12.in.us>]

Thanks to all who responded.
My problem was overheads that have problems that  have either shades of
blue at the top and/or shades of brown at the bottom.  One also does not
focus at the bottom if the top is in focus.

The consenus was that either the mirrors maybe out of alignment or the
fresnal lens might be warpped.  Other  ideas were
turning the plastic/glass surface over ...not having them facing the
right way may cause problems...
all of the reflective surfaces -- inside & out -- are perfectly clean &
scratch-free
fresnel lens is not seated properly
lens may be in upside down or someone may have used ammonia based
cleaner on it.
When overhead moved back further from screen that blue and yellow effect
was corrected  (this was true in my case also)

I still do not have them fixed, but thanks to you folks, have narrowed
down the list of possibles.
--
++++++++++++++++++++++++@@@@@@@@+++++++++++++++++++++++++++
Ron McAtee, Media Specialist    email: rmcatee@netnitco.net
Kankakee Valley High School     http://165.138.231.2
Wheatfield, IN 46392            219.956.3143 ext. 209
++++++++++++++++++++++++@@@@@@@@+++++++++++++++++++++++++++

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-==-=
All postings to LM_NET are protected under copyright law.
 To quit LM_NET (or set-reset NOMAIL or DIGEST), send email to:
   listserv@listserv.syr.edu          In the message write EITHER:
    1) SIGNOFF LM_NET 2) SET LM_NET NOMAIL or 3) SET LM_NET DIGEST
 4) SET LM_NET MAIL  * Please allow for confirmation from Listserv
 For LM_NET Help & Archives see:  http://ericir.syr.edu/lm_net/
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=