Chuck Tribolet wrote:
FWIW, I've got a Fluke 77 that I bought in the late '80s. no such problems.
I do have to change the battery about every four years.

In my experience, a dim LCD is usually indicative of low power supply voltage.
Though what's strange here is that that shouldn't vary with the function being
displayed. Anyway, I'd check connections several times before ripping into
anything.

Hi Chuck,

The model I have is the 79, probably of a similar vintage. I'm familiar
with the low battery fading too, and that will affect all the segments.
But when those contact need cleaning, it first shows as one or two
segments getting a little dimmer than the others so now I go ahead and
clean it. I say every two years, it was probably more like three or four.

It is fairly simple, open the case, remove a couple of screws to get the
PCB loose and four screws from the back of that hold the display on.

The first time it happened, a guy on a newsgroup told me how to fix it.
That worked, and I was tickled pink.

I was a little tempted to put some dielectic paste on that but I was not
sure if that would be a good thing for whatever the contact strip is
made of. I'm retired, I can spare the time to clean that occasionally.

I love my Fluke, it is perfect for the kind of things I do with it and
generally up to rougher service use.

Jack

--
Jack Erbes in Ellsworth, Maine, USA - jackerbes at adelphia dot net
(also receiving email at jacker at midmaine.com)