I removed the flyback with just that plan in mind. Got it successfully
removed and still had 2 of the 6 leads still in place, but then realized
that there were 5 broke transformer leads and 4 pins to solder them to with
the extra lead splitting the difference between two pins. Well, I picked
one and so far, I've managed to get the monitor to come back to life with a
The officil HP85 service manual (I am pretty sure it's o nthe Australian
Museum site) is called the 'Assembly Level Service Manual' which sounds
liek a boardswapper guide. It is,, but the full scheamtics are in the
back. Fig 10-6 shows the video circuitry. The pin where 2 wires go seems
to be pin 5, the one conencted to a 12V rail. This should be fairly easy
to identify.
nice scan but the computer refuses to boot. Will need
to see if the problem
is still the video board or other. Hoping I haven't sent 800v down a 5v
line.
I doubt it. I don;t think any other part of the computer runs off the
flyback circuit.
Many HP85 probleems are due to bad contacts on the ribbon cables. It's
worth checking all of them.. Then check the PSU rails, You might read
section 2-26 in the service manual too.
I've seen the ebay piece your talking about and I
agree, if that the going
rate, this one might get to be a parts unit and I'll keep looking for
another.
YEs. I thought about buying an HP85 keybaord to use with my 9915. It's
the same keyboard matrix, all I'd have to do would eb to wire up the
cable and case it. But not at that price...
-tony