Hello,
My TI Polar has started making a constant hi-pitched whining sound - I assume from the display backlight inverter (if there is one)? Anybody know of a fix? I have an extremely quiet control room so it's incredibly annoying!
Thanks 
Hello,
My TI Polar has started making a constant hi-pitched whining sound - I assume from the display backlight inverter (if there is one)? Anybody know of a fix? I have an extremely quiet control room so it's incredibly annoying!
Thanks
This may or may not make a difference, but it’s worth trying a different power cord, as well as plugging into a different outlet (esp. conditioned power).
Also, disconnect all cables except for power and see if that makes a difference. Perhaps it’s related to some stray current and a grounding issue. It’s at least worth ruling out before you dig any deeper. If the display is going bad, it is replaceable.