Question about Sansui DTV2760 27" TV

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Will not power on just making a high pitched humming sound

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2 things for you to check if you going to open it and do it yourself

First: The internal fuse, check it hasn't blown, if you don't have a multimeter, u can turn your stereo up loud and touch one end of the Aux line out lead if you have one. It will Buzz when you touch it, then touch one end of the fuse to the 3.5mm jack and the other end to your finger, if it buzzes the fuse is working, if it doesnt it is dead

Secondly: Could be blown capacitors, you can tell they are blown if they are buldging or have brown residue on the circuit board or on top of them

Please if you dont have any experience in opening Tv's its best you get a pro to look at it for you

Posted on Apr 05, 2011

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It seems that the SMPS is loaded as the driver is cut off on protection which makes the whining noise. You will need to remove the panel after disconnection of power, disconnect power to the main board and see if the +B voltage comes up on the circuit.
If so there is a short in the mainboard, can be the drivers shorting. Check with the multimeter to confirm

Posted on Apr 05, 2011

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