Question about Zenith C27A24T 27" TV
Wont turn on and when plugged in it makes a high pitch noise and wont stop untill after i unplugg it and it happened while i was sleeping
All later TVs are really not 'off' when you turn them off. They have power to some circuits all the time if plugged in, otherwise they could not even respond to an 'on' signal from your remote.
The squealing you are all hearing is from a dying 'switched mode' power supply and is normally caused by a ferrite-core transformer running at the wrong frequency and complaining about it. The problem with them is almost certain to be caused by failed or failing electrolytic capacitors (cheap to replace) but continued attempted operation could cause further damage.
This problem is common enough that any half-way competent tech with a capacitance meter could weed out the culprits pretty quick.
I'm tempted to suggest you get these repaired if they were otherwise satisfactory since the flat panels too often seem to only survive the warranty.
If I was doing the repair, I would give you an estimate of under $75. US
Posted on Dec 09, 2008
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Posted on Jan 02, 2017
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