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Eng. Andres
Eng. Andres, Engineer
Category: Electronics
Satisfied Customers: 68
Experience:  Electronic Eng. Electronics Specialist. Circuit designer
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The picture went last night on our Samsung PS42C450 42-inch

Customer Question

The picture went last night on our Samsung PS42C450 42-inch 600Hz Widescreen HD Ready TV it switches on and off but cannot get picture of sound
Submitted: 4 years ago.
Category: Electronics
Expert:  TV-Tech1 replied 4 years ago.

Is the screen PITCH black or does it glow gently after it turns on? If it's switching on and off real fast, you may have a direct short on the power supply or one of it's loads. If so, it would be wise to use a digital voltmeter and check voltages and resistance to find it.

 

Quick info on voltmeters and how to measure voltage and resistance --

 

http://www.youtube.com/watch?feature=endscreen&NR=1&v=bF3OyQ3HwfU

 

We will be concentrating our efforts on the TV's power supply board, using that to run our tests. But to be honest, we really can't run those tests until about 3PM UK time on Sunday.

Or 9AM Eastern US time.