Whine from KDS Computer monitor

[Michael L]

I have an older 17" KDS computer monitor. It is a soft start switch model
and is continually energized even when off. Lately a couple of things have
developed.
1. It emits a contnuous very high pitched whine even when "off" Is this the
flyback going?
2. When running it emits a whooshing sounds as if something is gurgling in
there. None of the caps appear to be overheating. Any idea what this noise
is??

 

[Dave D]

I have an older 17" KDS computer monitor. It is a soft start switch model
and is continually energized even when off. Lately a couple of things have
developed.
1. It emits a contnuous very high pitched whine even when "off" Is this
the
flyback going?

Almost certainly not. Change all the electrolytics in the power supply
section.

2. When running it emits a whooshing sounds as if something is gurgling in
there. None of the caps appear to be overheating. Any idea what this noise

See above.

Dave

 

[Sky]

The whining is likely the pulse width modulated power supply transformer,
ringing, may just need to be hot glued, but can also be a load on it, making
it
work harder than normal. Sky