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Thread: TV squealing |
    
New member Username: Bdkrazy
Post Number: 2
Registered: Mar-05
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| Posted on Thursday, March 03, 2005 - 11:41 am: |
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SO I turned on my 32" Sanyo flat screen TV today and it was making a horrible high pitched sound. So I turned it off for a couple hours hoping it would be okay and it is still making the noise... any ideas?? |
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xvxvxvx Unregistered guest |
| Posted on Thursday, March 03, 2005 - 02:45 pm: |
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The high voltage flyback transformer is going out. You really need a service call on this one.
xvxvxvx |
Silver Member Username: Vindsl
Post Number: 117
Registered: Jul-04
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| Posted on Friday, March 04, 2005 - 03:59 am: |
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I concur! |
Bronze Member Username: Dmwiley
Post Number: 62
Registered: Feb-05
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| Posted on Friday, March 04, 2005 - 11:31 am: |
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Kill that pig!!! |
Silver Member Username: Vindsl
Post Number: 118
Registered: Jul-04
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| Posted on Saturday, March 05, 2005 - 01:59 am: |
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To be fair, what I've noticed is - a lot of times, it's just a matter of cold solder joints under the flyback transformer.
For some reason, these flyback solder joints like to crack. And, you can only see the cracks with a lupe magnifier. So, if it was me, I'd break out the soldering iron and go to town on the circuit board.
If you have a magnifier, all the better. At the risk of showing my geekyness, this is what I use:
2.x OptiVisor w/OptiLOUPE Option
Worth it's weight in gold - no kidding!  |
xvxvxvx Unregistered guest |
| Posted on Saturday, March 05, 2005 - 11:16 am: |
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I agree with your analysis about potential cold solder joints. However usually someone who posts a question like the original poster will generally not be able to even identify the flyback transformer much less own a soldering gun and be comfortable performing the task.
xvxvxvx |
Silver Member Username: Vindsl
Post Number: 120
Registered: Jul-04
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| Posted on Sunday, March 06, 2005 - 03:05 am: |
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Oops!
Um... Cameron (and others), please don't mess with flyback transformers unless you know what you're doing! They produce about 25,000 volts, and they'll 'bite you' if you aren't careful.
Besides making nice hissing noises, they're excellent at creating heart attacks... |
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