Turns out that it's the VFD in my 58503A that is bad, and not the driver chip.
The good news is that I don't have to do any PCB rework. The bad news is that I have to find a replacement VFD at a reasonable price.
Any ideas (besides eBay)? And if I do end up buying on eBay, does anyone have any experience with replacement VFDs from China?
Thanks,
Stan
