OUTCOME: I replaced the four capacitors on the power board. I did not replace the three smaller capacitors on the Vacuum Fluorescent Display (VFD) board due to issues described in the rework section below.. After the change, the VFD brightness is improved enough to read the temperature, but not as good as new, as the upper part of the VFD is still a bit dimmer than the lower part..
REWORK: The board is single sided without plated holes. The original caps have bent leads. Finesse the temperature and wetting, but expect to damage the some pads during rework. The traces are easy to follow and...