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Steven
Steven, Technician
Category: TV
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Experience:  Ma. Master Technician Lic. Authorized Warranty Support.
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Sony Bravia no power. Replaced the power supply and still

Sony Bravia no power. ... Show More
Sony Bravia no power. Replaced the power supply and still no power. No capacitors look bubbled. MODEL KDL 32 EX 301.  MANUFACTURED IN MAY 2010
Submitted: 5 years ago.
Category: TV
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replied 5 years ago.

Steven :

Hi my name isXXXXX will be right with you. I may have a few questions to be able to provide you with a more accurate answer to your question.

Steven :

what happens when you try to power it on ? is the LED flashing ?

Customer:

no lights or clicks

Customer:

i also don't have remote as i got this at a yard sale

Steven :

Ok thank you for that information, why did you change the power supply ?

Customer:

i went to a tv repair place and they diagnosed it

Customer:

but wanted 280.00 for my 38 dollar part

Steven :

Ok, when press the power button does the LED on the front at least flicker ?

Customer:

let me turn out the lights and look

Customer:

no do you think its the little panel with the power on button on it thats is bad?

Steven :

I doubt it, here but here's what you can try just to eliminate that, the power switch is just a momentary switch, you could try just using a wire and shorting the switch for a second to see the unit powers up, if it does noit then as you there are only 4 boards in this unit the power you have changed, the tcon or inverter are not going to create this condition, this leaves the main board.

Customer:

I tried a paper clip on that wire already to no avail

Customer:

so replace the main board?

Customer:

anyway to read if power is getting to main board?

Customer:

Why would such a new tv fail? Power surge?

Steven :

yes you can just check the power supply connectors from the power supply to the main board, there should be a 5 volt stnby voltage even when the unit is off and pluged in,

Steven :

the voltages will be marked at the connectors

Customer:

I will check. Thanks. I have a service manual for this tv from online source also. that my help

Customer:

See you. Collect the pay

Steven :

there has be a 5 volt stand by voltage to run the main board to except commands from the button assembly and the remote

Customer:

gotcha. will check for a 5v reading on the connector to see if the power supply is getting to main

Steven :

you can always come back to this post with foloow up questions if you need to.

Customer:

ok

Steven :

if the 5 volts is there then the main is most likely the problem