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Monitor whistles and shuts down - Star Logic 17" LCD Monitor

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I would unplug it and inspect the power supply section for bad caps first before the problem gets worst.

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm/

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.
Replacement board: http://www.lcdrepair.us

Posted on Jan 04, 2011

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rid5178,

Your unit has a short somewhere causing the power supply to overload, slow down and produce the whistle sound. It is more than likely in the high voltage section. I have a tip at http://www.fixya.com/support/r6396176-projection_tv_troubleshooting which should help you find it.

Thanks for using FixYa and for the great rating.

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Our Mitsubishi wd-65833 tv turns on and makes a whistling sound like it is powering up-then the red lamp light comes on and it makes the whistling sound in reverse (kind of like the sound of a bomb...


This mechanical whining sound is typical of what is know as a color wheel fault. Color wheels are mechanical color disk that spins. generally if they do not reach a certain speed the set will shut down. It is a moving part and anthing that moves will eventally not move. other possiblilites might be cooling fans if they shut down then the lamp will shut down. to determine which a technician will need to remove the back and isolate where the sound is coming from.

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1 Answer

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Try changing refresh frequency, color depth or resolution (wait for the whistle to appear before testing). Admittedly, you might have to give up some image quality - less colors, or less resolution. There is probably a problem in the TV syncing mechanism - if you can, try getting it replaced. "High pitched whistles" in video and TV hardware are usually harbingers of bad news.

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