[rescue] Power question...
me at dansikorski.com
Mon Jan 12 22:50:55 CST 2004
Carl R. Friend wrote:
> On Sun, 11 Jan 2004, Nathan Raymond wrote:
>>I realize this is somewhat off-topic, but I figure you folks are some of
>>the most experienced people to ask this question: what would cause
>>computer monitors (any monitor, hooked up to any computer) to jiggle at a
>>refresh other than 60Hz? I'm talking serious jiggle, and at any refresh
>>above 60Hz. This has been happening since I moved to an apartment in
>>Cambridge, MA a few months ago, and it happens to all my monitors (four
>>different ones, three different brands), hooked up to any computer. I
>>only get a stable image at the eyestrain causing, headache inducing
>>refresh rate of 60Hz. I've tried outlets on either side of room, no
>>difference. I don't have any sort of UPS, just some high quality power
>>strips (and this happens on more than one power strip, so I know it's not
I've dealt with this one before too....
>> This is going to sound completely off-the-wall, but there are a
>>couple of office in the building I work in where conventional CRT-
>>based monitors are just about useless and just for that reason. We
>>know that there's a UPS (to power our telephone switch) just adjacent
>>to one of the rooms, and suspect that there may be a power feed in
>>a conduit near the other office. My suspicion is that you've got
>>a large source of magnetism somewhere in your close vicinity (are
>>you near the main A/C compressor motors?). Take a quick squint
>>around your environs.
>> How did we fix the problem at work? We installed flat-panel
>>displays for the folks in question. As an aside, the problem
>>isn't a _flicker_ per se, but rather a "wobble" in the display.
In the situation that i dealt with, there were some large transformers
on the roof of the office. This was probably 4 years ago, so a LCD
monitor wasn't really an option. I swapped the guy's monitor out for a
better one so that he could run it at 120hz, which took care of the
problem. If your monitor will support it, i would suggest that.
Otherwise, it's time to track down where the interference is coming
from. Good luck!
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