In article <Bxru3q.Lry@news.cso.uiuc.edu>, rg9538@ehsn2.cen.uiuc.edu (Ronald E Garnett) writes:
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>Another problem I've found....curoius as to other peoiples experience...
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>The problem is with my Nanao 9070U monitor. It usually has a fairly crisp display,
>but lately I've noticed quite a bit of flicker and wavering of the screen. At first
>I though that the monitor was going to monitor heaven, but then I thought to measure
>the input power levels.
>
>What I discovered is that the input power to my apartment varies between around 112 V
>and 120V, depending on what other people have turned on, refrigerators, etc. This
>is normal, but the Nanao problem follows the voltage. When the voltage drops much below120 V, the flicering starts. Around 112 it gets really annoying, as the screen is wavering as much as an1/8 of an inch. For a $1000 monitor, this is quite disturbing!
>
Sounds to me that your monitor isnt being sensitive to line voltage, but rather
the line noise being introduced by the appliances that are causing the drop in
line voltage. Things like blenders and hair dryers introduce a LOT of noise
into the AC signal, believe it or not. Go out and buy a surge protector that
EXPLICITLY states it includes RFI/EMI filters (they are usually harder to find,
but they are likely to solve your problem.) I've seen places like Builder's
Square selling Woods Surge Protectors w/EMI/RFI for about $15.
