Berkeley CSUA MOTD:Entry 36985
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2005/3/30-31 [Uncategorized] UID:36985 Activity:high
3/30    Has anyone else had a monitor that makes a really high pitched noise?
        I changed the refresh from 75 Hz to 85 Hz and it stopped, though.
        \_ It most likely means one of your caps is bad. Take it back to
           manufacturer for a replacement. If out of warranty open it up
           and find out which cap is singing. Get a replacement cap from
           Radio Shack or Digikey if it's a rare one. You'll need to be
           semi-decent at soldering if the singing cap is on a multilayer
           PCB to prevent burning the pad ring off.
           BTW, it WILL get worse over time.
           \_ #include <be_careful_dont_kill_yourself.h>
           \_ Are you giving out advice on how to kill the original poster?
              Do not fix it yourself, please.
           \_ That's okay, I wasn't planning on fixing it anyway. The monitor
              is like 6 or 7 years old now, but I was just wondering. Thanks.
        \_ Maybe the noise doesn't stop when you changed from 75Mz to 85Hz,
           and it just goes beyond the auditable range which is about 20Hz
           - 20kHz.
        \_ Is the monitor a trinitron (apeture grill) tube?  It could be
           "trinitron whine", as the horizontal wires holding the grill
           grow loose and the wires resonate with the electron beam.
           Noisy but not a physical problem:  Give the monitor to
            your parents who don't have high frequency hearing anymore.