[rescue] Mac video cable?

Phil Stracchino alaric at caerllewys.net
Sun Dec 21 13:18:58 CST 2003

On Sun, Dec 21, 2003 at 08:19:16PM +0200, Geoffrey S. Mendelson wrote:
> Phil Stracchino wrote:
> > We have just acquired a Power Mac 7300/180 and an Apple Multiple Scan
> > Display 1705.  The 7300 is known to work; the 1705 is believed working;
> > but the 1705 will not sync to the 7300's video output.  On the principle
> > of lowest-cost-component first, I'm speculating that the problem is a
> > bad video cable.
> > 
> > Unfortunately, we have no spare Mac video cables.  Does anyone else have
> > a known good Mac video cable, of the DB15M-HD15M variety as used by Power
> > Macs of this age, surplus?
> Sure, want to pick it up?

I think this'd be logistically difficult, unless you know something I
don't.  :)

> BTW, the 1705 I have spent 6 months on a PC running
> windows 98 and linux. It worked in 640x480 up to 1024x768.
> Almost any multisync PC monitor will work with the 7300/180 and the cable
> from the 1705. 

OK, so that gives me a way to check both the monitor and the cable.
Probably the cable first.....

Connecting the 7300 via the existing cable to the second input on my
GDM-500PS gives me video, though only at 640x480.  The 7300 would not
admit the availability of any other resolution, though I run the GDM500
at 1600x1200 on the PC connected to the primary BNC inputs.

Connecting the 7300 to our one other available Mac monitor, a Macintosh
Multiple Scan 14" Display with a hardwired cable, I can get video at
640x480, 800x600, 832x624, or 1024x768.  (The monitor, however, is in
such bad shape that it's only usable at all at 640x480 or 800x600, and
even then, it's faint and blurry.  It's not, in practical terms, usable 
other than for testing.)

Connecting the 1705 to my wife's Dell via the Dell's existing known good
video cable gives me video on the 1705 at 1024x768.

To me, this seems to be pointing the finger at one or more of the sense
pins in the cable.  So it does, indeed, look like we have a perfectly
good monitor, but need a working cable.

Anyone else concur or disagree?

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