RCA F36673ET 36" TV
The picture and sound cut off while watching it and there was a very high pitched whining sound coming from the back where the power cord goes in, when I unplugged it, the sound 'faded', the only other way i know to describe the sound is that of a jet engine slowing down to a stop, if that makes sense. If I plug it back in, the sound starts again and fades when I unplug it. Any ideas? Thanks.
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Re: Possible power supply problem?
Yep i can tell you what it is. The High pitched sound is the power supply soound when its overloaded and thats because the Horizontal output transistors shorted and this happened because of the flyback transformer went bad and /or the horizontal driver coil right off the secondary of the horizontal driver transformer and then the other side of this coil connects to the base of the horizontal output transistor. The part transformer cost about 35 to 45 bucks to the dealer and the transistor cost about 15 bucks. the total repair job cost about 175 to 225.00 after all said and done and some shops even may charge more ad there labopr rates may be higher. Good Luck
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Aug 23, 2013 - Uploaded by ShopJimmy.com
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Most likely the color wheel is starting to go bad adn when they do they get a high pitched whine sound coming from the bearrings on the wheel. Might want to look at getting a replacement before it quits. When they die you can't watch your tv till it is repaired.
is this just a whine since you describe no problem with the picture it dosent jump or change color or flicker. there may be an easy fix this sounds like some coils oscillating and i tell you what can be done you can take some silcon and put on these coils to dampen then vibrations. now ther may be other problems but without looking this is my first gues ...where are these coils? ll037 on the power supply deflection board
I haven't worked on an RCA DLP but have on Samsung DLP, based on your description it sounds like the color wheel is bad. Take the back off and turn on TV make sure its not a fan making the noise ,but most likely its the "wheel" it is inside the light engine probably right next to where the lamp is plugged in. If the whine comes from this area definitely the wheel.
This is an issue with one of your power supplys wether it be high voltage horizontal power supply or the reg power supply. The beeping noise is letting you know that it has some power but not enough to start the high voltage needed to create the picture on your tube. I would seek professional help for this issue.