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Old 07-22-2012, 05:45 AM   #1
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Old Mitsu 27" tube TV hums while off


I have an old tube TV in my kitchen eating area that works just fine... except it recently started humming after it gets turned off. So every time I turn it off now I unplug it. Is there an easy fix for this? I assume it needs a replacement relay or somesuch? I am fairly comfortable going in there and working on it having once upon a time gone in to jumper out the picture in picture based on a website how-to when it failed.

Any of you guys have the solution?

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Old 08-26-2012, 07:12 AM   #2
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Old Mitsu 27" tube TV hums while off


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Originally Posted by raylo32 View Post
I have an old tube TV in my kitchen eating area that works just fine... except it recently started humming after it gets turned off. So every time I turn it off now I unplug it. Is there an easy fix for this? I assume it needs a replacement relay or somesuch? I am fairly comfortable going in there and working on it having once upon a time gone in to jumper out the picture in picture based on a website how-to when it failed.

Any of you guys have the solution?
Take a look at the capacitors in the power supply. If they are bulging then replace them. dorf dude...

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Old 08-26-2012, 07:37 AM   #3
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Old Mitsu 27" tube TV hums while off


Thanks for the input. Where is the power supply typically located? I assume it is just a section on the circuit board?

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Take a look at the capacitors in the power supply. If they are bulging then replace them. dorf dude...
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Old 08-26-2012, 07:58 AM   #4
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Old Mitsu 27" tube TV hums while off


Bad flyback transformer is what is causing the hum, not capacitors.
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Old 08-26-2012, 08:05 AM   #5
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Old Mitsu 27" tube TV hums while off


Where is that located and are replacments available, OEM or generic?


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Bad flyback transformer is what is causing the hum, not capacitors.
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Old 08-26-2012, 08:23 AM   #6
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Old Mitsu 27" tube TV hums while off


OK, I googled them and found a site that lists a bunch. I need to open my TV up and see what I have. But at these prices and depending on which one it is the TV may be "totalled".

http://www.technotronic-dimensions.com/Products2-2.html

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