11Dec/092
My 32” Sony Lcd Tv Has A Whine/squeal That Is Very High Pitched. What Could Be Causing It?
I got a 32'' LCD TV by Sony in July. By mid-August the TV was producing a high pitched squeal or whine after being on for just 30 minutes. I called warranty repair, and the man replaced the power supply in the unit. About a day later, the noise has returned. What could possibly be causing this in a 2 month old TV?
December 11th, 2009 - 12:44
Any TV can develop problems, but a brand new replacement power supply should not fail again in the same manner. Squeals are often times emitted from failing capacitors. Power supplies use capacitors and typically use larger sized capacitors that can and do fail. What it sounds like is that Sony may have gotten hold of a bad batch of capacitors and you are unlucky enough to have received two successive power supplies with those bad capacitors. Contact Sony and have the power supply checked again. It could also be bad capacitor elsewhere in the system or a failing fan.
Do not put your faith blindly into a manufacturer’s products. Not all Sony products are great nor are they all problematic. I have heard that Sony has had reliability problems with the M4000 series. I do not know if this is your Sony TV model, but I do hope that you will seek out reliable, trustworthy recommendations before your next purchase. Always be skeptical when making large purchases. Companies fortunes do change with time.
December 11th, 2009 - 19:16
Great previous answer. He is right about the “m4ooo” line. Sony and several other tier 1 manufactures started producing “cheap” tv’s this year to compete with the low end “chinese” grade products like vizio, olivia, insignia, polaroid, westinghouse, etc.