Thanks ,
the OSD was abandoned more than 15 years, almost now dead
in 2000 it was OK.
First the CMOS ERROR asked me the bios FLOPPY , last month..
I change the video card battery that was with 3 Vols.
nothing the same error , next week started to suddenly stop and start ,intermittent ..
now does not start at all , the service manual said , put the resistor to inhibit the Power supply and replace it if does not start.
I guess is true , trying to replace the PS , but there are to many signals in the control connector , I am busy in a small garage with cars ,etc. and I need the schematics to prevent putting wrong voltages in sensible circuits.
.