Re: Samsung ln40c530f1f LCD won't turn on - no power led

Thanks truep. Can you be more specific where to check the voltages, are these the ones circled?

If I could be sure it is the main board, I'd replace it for a $100....

Re: Samsung ln40c530f1f LCD won't turn on - no power led

I never figured it out, my TV is still sitting broken. Power supply seems to be good, so it must be a main board. But replacing it altogether is too expensive, it goes for like $100 on ebay. Will have to trash it unless someone can tell me how to fix it on a component level.

Re: Samsung ln40c530f1f LCD won't turn on - no power led

Ok, so I tested as Randtek instructed. Unplugged a cable from the main board to the power board. Applied power, backlight came right on. What should I test next? Attached are the pics of the main board....

Re: Samsung ln40c530f1f LCD won't turn on - no power led

Thanks for reply Randek. Will try the test you suggested next week. If not the power supply, what else could it be, what should I test next?

Hi all.

I have a 40'' Samsung LCD TV that all of a sudden won't turn on. I think at some point it would take a few tries, but would eventually turn on, but now it is dead. No lights, sounds or anything when power is pressed.

Reading here, I thought it may be a power supply (model BN44-00340A). So I took out the power board (pics attached). Nothing obvious, nothing seems burned. All caps seem ok, fuses intact. I plugged the power supply in and tested all the voltages. They seem ok - either 5V or 13V as in the legend printed on the board. Could it work ok out of the...