HP-48's display with an unusual(?) stain

[DavidM]

That display artifact appears very similar to an issue I had with a 48sx shown in this thread. I tried several things, none of which helped in any way. Ultimately the display was swapped with one from a 39g, and you can see the result in that thread.

I don't use that calculator very often now, but I'm always impressed at how aesthetically pleasing the black pixel display is with the color scheme of the 48sx, which IMHO has the best color choices of the series.