Re: TV won't turn on high pitched noise from power supply board

Ive done a little more troubleshooting this morning. It does make this noise is standby and the noise doesn't change when I attempt to turn it on. The noise changes when the main board is unplugged, it changes to a kind of clicking sound with a pattern to it.

When I measure the voltages on the pins what do I use for ground/return/black lead? Do I use the posts in the corners?

Re: TV won't turn on high pitched noise from power supply board

I tested 3 of the caps making the most noise and they tested fine, what do you guys think is the problem? I'll get voltage readings sometime this weekend if I'm not busy. Thanks for your guys help!

Re: TV won't turn on high pitched noise from power supply board

Yes made a year ago and purchased on June 12th of this year. I don't have my DMM with me it's sitting at work so I haven't done any testing. I don't see any voltage labels except for the low voltage chart thing and I don't see labels on the board that match. The longer connector going inside the TV to the LED's are labeled mostly LED + and LED - where as the shorter connector going to the main board is labeled just pins 1 - 14. Is this what you were asking, measure the voltages on each pin?

Re: TV won't turn on high pitched noise from power supply board















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I purchased this TV less than 3 months ago brand new from Target and it's already broke. Target won't take it back and the manufacturer won't repair it because I don't have the receipt and Target can't get me a new one.

So I'm here looking for help troubleshooting my problem. I was watching a quick show while eating and a high pitched sound started, the display flashed multi-colored vertical and horizontal lines and then when black.

I unplugged it and the sound stopped, plugged it back in and it started again, TV hasn't turned on since though the LED “off” light...

Re: New Members - please post your introductions here

Hey guys! I'm a biomed for a job and I'm in need of TV troubleshooting! So here I am! This seems like a great community and I look forward to getting and giving advice!