[comp.sys.amiga.hardware] amiga to multisync problem

kamran@dialogic.com (Kamran Vaziri) (01/31/91)

I wonder if anyone can help me with a problem I'm having connecting an analog Thompson multisync to my A500.  I built a cable with the Amiga 23 pin D connector on one end and the analog 25 pin D on the other end.  I used the pinouts which came with my monitor and also referenced the Amiga manual for it's pin outs.  I'm sorry I can't display my actual wiring diagram because I left that info back at home but I do remember the functions of the pins which I connected :

Red
Red ground
Green 
Green ground
Blue
Blue ground
Horizontal sync
Vertical sync
Sync ground

Now the problem is this.  When I turn on the system with the cable plugged into the Amiga, the system does not boot (I have a single drive system).  The drive light doesn't even go on though the screen does flick through a couple of colors before going completely black.  Then I unplugged the monitor cable from the computer and restarted the system.  The system seemed to boot fine without the monitor plugged in.  I then plugged the monitor into the system WHILE the system was ON (I know that's not cool but 










a mans gotta do what a mans gotta do) and IT WORKED FINE!!!  Are there any connections I'm missing???  I have a feeling that it'snot getting past one of the self tests but I don't know why.

Any hints would really be appreciated.

Any replies can be posted to this group since this might be of interest to
others.
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kamran@dialogic.com