From: "George R. Gonzalez"
Subject: Re: Urgent help needed to blank monitor
Date: Tue, 5 Nov 2002 13:21:34 -0600
Organization: University of Minnesota, Twin Cities Campus
X-Newsreader: Microsoft Outlook Express 6.00.2800.1106
> I wrote a program, which run in a customized PC, using a customized
> keyboard, in a kiosk-like box. The software runs just fine, but now the
> company I wrote that product for, requires that there should be a blank
> monitor while the operating system loads (Windows 2000), and the monitor
> should be turned on only when the application is already running full-
There's a pure-software way:
Go to your local electronics junk place, buy a bunch of old video cards,
exact type doesnt matter. Around here you can get your basic 1995-vintage
card for about $4 each.
Put one of these cards in each PC. Set the default monitor to be that card
the card in a certain slot).
Then juggle your application's windows so they show up on the "real"
Here's a very simple minimum-hardware way:
Buy three shottky diodes.
Hook the cathode ends to three separate pairs of parallel port lines.
Hook the anode ends to the R, G, and B signal lines on the VGA connector.
Now, if the parallel port starts up with signals low, the diodes will pull
the video signals, HOPEfully, down low enough to be unnoticeable.
Note: I havent tested this, so YMMV. Also, it depends on the parallel port
being normally low, which I havent verified.
If you try this with regular diodes, they may till let plenty of signal
You need really low voltage drop diodes.