After operating OK since the repairs I did after dropping a curtain pole
on this radio a month or so back, the LCD is playing up.

If I perform an operation that clears the display, and enter an 8 digit,
it looks normal enough. If I enter a second 8 digit, some of the
segments of both digits (the same ones in each case) become fainter. If
I enter a third 8 digit, the segments become fainter still, and so on,
until they're pretty much invisible.

This suggests an issue with one (or more) of the backplanes.

The signals going in look normal enough, and in particular the backplane
signals don't change as I enter additional digits.

Any thoughts before it ends up on the tip?

Sylvia.