Sounds like the monitor is getting confused by the other sync signals.
I had the same problem trying to connect an SGI Indigo 2 to a standard
VGA monitor. I found that by making a simple cable with only pins
1,2,3,6,7, and 8 connected (VGA red, green and blue, and associated
grounds). This stripped the extra signals, and it worked flawlessly. I
would think an actual SGI monitor would work fine without any
modifications though, but then again, it didn't work with my Sun
GDM-17E10 monitor without this sort of adapter.
Ian Primus
ian_primus(a)yahoo.com
On Wednesday, December 4, 2002, at 09:06 PM, Joe wrote:
At 03:01 PM 12/4/02 -0500, you wrote:
On Wed, 4 Dec 2002, Joe wrote:
I found two SGI "granite" monitors
for $5 in a surplus place this
morning. Does anyone know if these will work with the SGI Indigo?
(XS-24 video card.) I tried them but I'm not getting any video
and
I'm not sure if these are both bad or if they're even supposed
work
with the Indigo. I checked the SGI and Indigo FAQs and can't find
anything about exactly what systems the monitors are compatible
with.
Yeah, those should work just fine on the Indigo.
I assume your Indigo is known operational, and that you have a
suitable
cable. Do the monitors just not display a picture, or do they not even
exit power-save?
I don't think it's even exiting power save. When I turn it on the
power light comes on and there's a click from inside the monitor.
After a few seconds the yellow power save light comes on and then I
hear another click from inside the monitor. When I turn the Indigo on,
it powers up and plays it's tune so I know that it's started but
nothing changes on the monitor.
I disconnected the video cable at the monitor and looked for sync
on pin 3 and found that there was no sync* unless I started the Indigo
with no monitor connected. (The sync was 63.something kHz). If I then
connected the video cable to the monitor both the yellow power save
and green power lights started blinking.
*I don't think the lack of sync on pin 3 indicates a problem. This
monitor is suppossed to Sync-on-Green. In fact, the lack of sync on 3
when I boot the computer with the monitor connected may well indicate
that the computer recognizes that this monitor doesn't use a separate
sync signal.
The computer is definitely working. After trying these monitors I
plugged the video cable into my usual monitor and everything worked
exactly as it's supposed to.
I was wondering, if I use a logic pulser and pulse the green input
on the monitor will it generate random garbage on the screen? Any
thoughts on that?
Joe
ok
r.