PowerBook 190 external video question

[Perry]

Hi all,

I just received a used Apple video card for the PowerBook 190/5300 which
should allow me to hook up an external color monitor and display at least
in 8 bit color (256 colors), but after installing it and hooking up
various Apple Mac monitors (AppleColor High-Resolution RGB Monitor,
AppleColor Plus 14" Disply, Apple 14" Multiscan, and Sony 15" multiscan
with Mac video adapter), I get nadda on each of these displays via the
PowerBook 190 video out jack, using the supplied Apple PowerBook to Mac
video cable adapter.

All four monitors work just fine on my various 68040 and PowerMac G1 an G3
systems.

Do I need some type of system extension to use this PowerBook video card?

I've got the PowerBook 190 running Mac OS 7.5.2 (the OS which came with
it) and neither the Monitors Control Panel nor the PowerBook Display
control panel seem to detect this video card (ie. no mirroring allowed in
the PB Display control panel, no second display available in the Monitors
control panel).

The Apple PB > Mac video cable adapter looks to be in mint condition, so
I'm guessing the video card is toasted for some reason.

Can I hook up my digital multimeter to test for power (or lack of) or
signals coming through off the video board and cable?

Any tips or suggestions?

regards, Perry

[Perry]

Heya Joe,

Yup, it came with two screws, but I did not know what the second one was for.

I installed the fine threaded short screw to secure the card to the back
of the PowerBook, but I couldn't figure out what the longer (approx 5/8"
long - not fine threaded) screw was for. I'll open up the PowerBook and
take a look see as to where to put that screw in. Maybe that will change
the situation. I guess the longer screw goes through the motherboard at
some place? Is there even a hole in the motherboard of a PB190 (greyscale
motherboard) to do this?

best regards, Perry



In article <3f177ce0@news-1.oit.umass.edu>, "Joe Heimann"
<heimann@ecs.umass.edu> wrote:

> Did the card come with both screws to hold the card? There is one that
> secures the output jack to the case exterior, and another one that goes
> through a hole in the card into the bottom case. Without the second
> screw, the card tends to pop out of the expansion socket. You might be
> able to keep the card in the socket using a pad of insulating material
> between the card and the keyboard if you do not have the screw. They
> used a similar pad in my 190 to keep the RAM expansion card plugged in
> its socket.
>
> Joe Heimann
>
> P.S. The same thing can happen if the screw is present, but where it
> screws into the bottom case is stripped.