This is from Sony's commercial line of monitors from a few years ago, panel
made by Fujitsu/Hitachi.

This one tries to start three times and then goes to flashing the LED
sequence 6. This is listed as a PDP error, but can mean other failures as
well. Apparently, the X-SUS and Y-SUS board were originally sold as part of
the panel, but are now available as discrete parts. I get all of the
voltages listed coming up ok except the Ve and Vq voltages at test points on
the DC-DC board. The chart on this board lists them as +18v but they go
negative by more than 100v. All ground points are at the same potential on
this and related boards. Sony tech says that these are returns from the
X-SUS board, but there is little info on either the SUS boards or the DC-DC
board in the manual. Looks like the X-SUS board is bad, but I'd like more
info.

Anyone familiar with these or perhaps with something similar from Fujitsu or
Hitachi?

Leonard