>> When it POSTs the frame buffer complains about a "red screen test" and then
>> the >> prompt appears. Doing a cnfg 0 shows the buffer, what is this error
>> and should I worry about it?
>
>        That means that there is no 75 Ohm termination on the red video
> output. There is (at least on red) a comparator on the RAMDAC output. The
> PROM monitor on the PMAGB-B enables the red output current, checks if the
> comparator bit is set (too high output voltage = no termination) and
> complains. If you connect a monitor (or better yet pull the framebuffer if
> you are not using it) you will not get that error...

That makes sense(!)  I have one DECstation document instructs to
connect two BNC terminators when standard 3W3->3BNC video cable is
hooked with a monochrome display with 1 BNC input. 

Tohru Nishimura