Disklavier

Greetings n9544c,

I am not familiar with the construction of the Yamaha display but I
have fixed several LCD displays. I assume that this is an LCD display
because "backlighting" was mentioned. The most common problem I have
found is the interconnection between the display and the driver. The
type that most often has this problem uses a conductive rubber strip
(an array of isolated conductive fibers)) between the driver board and
the LCD panel. Some of these (the newer ones) are sealed against
moisture with a special compound but the older ones were often not
sealed. They can fail if moisture or dust gets between the rubber and
the LCD panel. They can also fail if the feature that insures the
mechanical contact fails or if the rubber looses its elasticity. I
have fixed some of these displays by cleaning the rubber (no
fingerprints after cleaning) with 99% isopropyl alcohol and
reassembling them with shims (if necessary to insure a good contact).
It is best, however to replace the rubber conductive strip with a new
one if you can get it. I had fixed the LCD display on my Fluke
multimeter several times over the years. It would work for about a
year and need another cleaning. I then discovered that Fluke (I doubt
that Yamaha would do this) sold a rebuild kit for about $5 that
included an upgraded conductive strip. It is still bright and missing
no segments after 3 years.

In terms of replacement with a generic display: If there are dense
blocky special characters or symbols, it is possible that it is a
custom display but if it is just a pixel array, it is likely that it
is a stock part. There are some very common displays and you might be
lucky and find that Yamaha used one.

>       
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Best regards,
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