Question about Samsung Televison & Video
Hi, did u have a multimeter? you have to measure if the power supply has a complete voltage output in order to power up your T. there are 3 voltage requirements/output from your power supply.they are ;
1)5 volts -this voltage use to power up the mainboard
2)12 volts - this is a supply for the audio amplifier(sound)
3) 24 volts - this the supply for the backlight lamp.The lamp is the illuminates the screen.
I these voltages are present then your TV will turn on.there are reasons why the power supply doesn't turns on.When there is a shorted circuit on the section being supplied by the power supply the power supply will shut down.this is a fail safe operation of the power supply to prevent further damage and fire.The primary suspect of a shorted section in an LCD TV is the inverter section. this section is the supply of the lamp.the primary voltage input of this board is 24 volts and the output voltage is 100 volts AC.check the components of this board for any shorted.Check the diodes,transistors,regulators,and the ballast transformer.or you can replace them with a new board.They are available at stores on line.
After changing the capacitors at the power supply section and still it wont power up check also for any open resistors.All resistors must have a resistance if you measure an open resistors replace it immediately with the same color code resistance value.This power supply is also replaceable.this is available at shoppejimmy.com just search for you model and brand of your TV.I'll give you the link..
Posted on Mar 17, 2011
Tone that you heard means that you're supply voltage gone to shorts. Shorted parts is you're voltage regulator transistor(mounted in heat sink) in line with this capacitor. If you're not familiar troubleshooting the said parts, you may replaced the entire board for your convenient, click this link http://shop.ebay.com/i.html?_nkw=LN40A330&_sacat=0&_odkw=37RV530U&_osacat=0&_trksid=p3286.c0.m270.l1313.
Hope I helped you.
Have a nice day!
Thanks for using Fixya.
Posted on Mar 17, 2011
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Posted on Jan 02, 2017
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