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Mac PC-monitor adapter problem

Posted on 1998-12-06
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Last Modified: 2013-11-17
Hi everybody!

A friend of mine has a Mac IIic and a PC-style Sony monitor with an adapter connected to it. Since he moved the whole system and reconnected everything, the monitor won't show a picture. The front LED of the monitor indicates that it simply switches to standby mode (no monitor signal coming from the Mac?).
The adapter has about 10 DIP switches on it, but unfortunately there's no documentation whatsoever. He says he thinks that he hasn't changed any settings, but maybe accidentally... At least I don't know what else could cause the problem.

Please could anyone suggest what the problem might be, and/or give advice on how to set the DIP switches?

Thanks!

Schmox
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Question by:schmox
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4 Comments
 
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Expert Comment

by:weed
ID: 1537164
ive got the same setup...flip 2,3,6,7 ON and leave the rest in the OFF position. Thatll fix er.
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Author Comment

by:schmox
ID: 1537165
Sorry, but he says that didn't solve the problem.

I'm not even sure wether it's really related to the adapter. That was just speculation.
Could it be a defect in the graphics board? Would a Mac boot with a defective graphics board? Remember, the system worked fine before it was moved a little.

BTW, the DIP switch setting is 1,6,7,8 ON, the rest OFF.
Do you have any documentation about the function of each switch? What does 1,6,7,8 ON mean.
Or what does 2,3,6,7 ON mean?

Cheers,
   Schmox
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Accepted Solution

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weed earned 20 total points
ID: 1537166
2367 means generic monitor and is designed to work with any standard monitor at any resolution. Did he TRY that setting? Another solution would be to reseat the graphics board in its slot. In unplugging the monitor or moving it around you may have broken a connection between the card and its pci slot. pop the case open, remove the card and put it in again. You should also try zapping the PRAM at startup by holding down the command-option-P-R keys just after you hear the startup chime and keep holding them down until you hear the chime 3 times.
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Author Comment

by:schmox
ID: 1537167
Sorry, but that didn't help.
I tried different settings myself and found the correct setting: 1,4,6,7,8 ON
As I suspected, he must have accidentally switched No4 off.
I guess there are different kinds of those adapters, therefore the settings don't match.

Thanks anyway for your effort.

Schmox
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