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From: jmorriso@ee.ubc.ca (John Paul Morrison)
Newsgroups: comp.sys.handhelds
Subject: Re: lcd problem?
Message-ID: <1990Nov8.105717@ee.ubc.ca>
Date: 8 Nov 90 18:57:17 GMT
References: <39442@ucbvax.BERKELEY.EDU> <1990Nov8.104537.8801@jarvis.csri.toronto.edu>
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Reply-To: jmorriso@ee.ubc.ca
Organization: UBC Electical Engineering
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IF I understand the descriptions of the LCD problem, there is probably
no problem.

In article <39442@ucbvax.BERKELEY.EDU> s25bt@gandalf.Berkeley.EDU (Keith
Kong) writes:
# Several posts back, someone mentioned about a replacement 48SX
# displaying weird lcd behavior which can be likened to what
# you see when you turn off the tv.  Well, my newly bought 48SX
# showed the same type of problem.  I was fiddling with the on-D
# <- sequence, when suddenly, when I pressed the 8 key, zap!  
#  ......

When you fiddle with the  on-D <- sequence, you are entering the HP's
memory debugger/tester.
I won't go into detail, but it is possible to alter the HP's LCD
voltages, which can produce
a disturbing but basically harmless effect. (HP describes a possible
reliability problem if
you do this frequently).

Basically, stay out of the debugger. If you  are getting weird LCD
melting or bleeding, but
you are NOT fiddling with the debugger, or some kind of POKE program,
then you have a problem,
but that's what customer service numbers are for.