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Article #372

CrystalScan Monitor problems

#372
From: Elan Feingold
Date: Tue, 11 Aug 1992 13:40
40 lines
2837 bytes
Hum, I was wondering if anyone's seen or heard of this before.  I have a Gateway
2000 1024x768 Interlaced monitor.  It's a CrystalScan 1024 or something like
that.  I've always been able to get up to 800x600 without interlacing, as
advertised, and then at 1024x768 I go with interlacing.

As I have a diamond speedstar I have a utility called vmode, which lets me set
the clock rates at each resolution.  Up till a few days ago, I've had the 
640x400 set to the highest clock rate (~70Hz), the 800x600 set to the next
highest rate, and the 1024x768 also to the next highest rate.  I ran vmode
a few days ago, and just for kicks decided to see what would happen if I changed the 800x600 to the highest rate of refresh.  It seemed to work fine, so I left
it like that, and then proceeded to fool around with the 1024x768 mode.  I
moved it to the highest refresh rate (Non Interlaced) and although normally
the monitor can sync the signal, it worked fine!  I had 1024x768 NI and it
looked good!

The next day when I booted up, and ran my favorite GIF viewer, something was
wrong.  It wasn't syncing the 800x600 or the 1024x768, and the 640x480 mode
worked but the monitor emitted a wierd sound, sort of a tone, at the upper
limit of human hearing, at around 16-18Khz.

I though "Oh, it's just not warmed up," and went into vmode to change the 
rates of refresh to the lowest possible.  It still couldn't sync the 800x600
or 1024x768, and it still made the noise.  After turning everything off, and
starting over, I got it to sync the 1024x768 & 800x600 (I don't know how) but
now it makes that sound for 800x600 & 640x480, while IT STILL DOES 1024x768
NONINTERLACED AND WITHOUT ANY SOUND! 

Help!  Did I damage my monitor?  If so, why is it suddenly syncing 1024x768
NI?  Any help would be GREATLY APPRECIATED!!!

Elan

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|  Elan Feingold       |  Chevy Chase after being asked by a Howard Stern |
|  CS/EE Depts.        |  interviewer whether he still wore a toupee:     |
|  Cornell University  |  "Ask him [Stern] if he wants me to put his      |
|  Ithaca NY 14850     |   dentist in a higher tax bracket."              |
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From: elan@tasha.cheme.cornell.edu (Elan Feingold)
Subject: CrystalScan Monitor problems
Message-ID: <1992Aug11.134024.2798@tc.cornell.edu>
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Sender: news@tc.cornell.edu
Nntp-Posting-Host: tasha.cheme.cornell.edu
Reply-To: elan@tasha.cheme.cornell.edu (Elan Feingold)
Organization: Cornell University
Date: Tue, 11 Aug 1992 13:40:24 GMT