Re: Samsung LN32C540F2D NO Power No Red Light

So I did a little more investigation on my TV. What I did was went through all of the pins on the connector in between the Main Board and the Power supply board and tried to isolate which pins, when connected result in the backlight going off and the power at the connector dropping to 0. So here is what I found:

The PS_ON pin when connected results in all of the voltages at the cable between the power supply and the main board go to zero. If I disconnect the PS_On pin, the voltages at this connector all stay at the "appropriate"...

Re: Samsung LN32C540F2D NO Power No Red Light

Anyone on board have any idea if either of the following boards will be an acceptable replacement for the suspect main board I have?

[url]http://www.ebay.com/itm/SAMSUNG-LN46D550J1F-MAIN-UNIT-BN41-01477C-BN96-15661A-/190748086785?pt=US_TV_Boards_Parts_Components&hash=item2c6978d201[/url]

[url]http://www.ebay.com/itm/Samsung-LN32C530-ver-SQ05-MAIN-BOARD-/360497275865?pt=US_Rear_Projection_TV_Lamps&hash=item53ef4fe3d9[/url]

My part number is BN96-14763A v1007A

Thanks!Re:...

Re: Samsung LN32C540F2D NO Power No Red Light



I am getting the correct voltage on these pins, on the power supply board at CN802 but only when the Main Board is disconnected. As soon as I plug in the main board, all of these pins drop to 0 volts. I don't know if this makes any sense at all but it is what I am experiencing.

Is there anything else I should test?...

Re: Samsung LN32C540F2D NO Power No Red Light



Ok so no voltage on any pins. So I thought Iwould verify the voltage on the cable coming in from the power supply. When plugged into the main board, the row of pins accessible from the top have no no voltage at all however when I unplug the cable from the main board the cable has voltage . Plug it back into the main board, no voltage. Maybe this is expected behavior. I dont know. In any case, the regulators definitely have no voltage on any pins.

I'll keep at it.

Jeff...

Re: Samsung LN32C540F2D NO Power No Red Light



Looking for a main board now just to be prepared. Wondering how to interpret the part numbers. Can anyone tell me what the next version board would be or a list of compatible part numbers?

Thanks,
Jeff...

Re: Samsung LN32C540F2D NO Power No Red Light

Here are the best close ups I can get of the regulators with the lighting I have available.
Thanks Again!...

Re: Samsung LN32C540F2D NO Power No Red Light

Added some additional pictures may have to post a second reply to get all of the pictures requested. I appreciate everyone's help.
-Jeff...

Re: Samsung LN32C540F2D NO Power No Red Light

Almost Midnite here. Will take some good pictures tomorrow and post them. Thanks!

I have the subject TV that does not power up and has no red power light. So far I have taken the back off and visually inspected all components on the main board and power supply board with everything looking OK. With the main board plugged into the power supply, nothing happens when plugged in.

If I unplug the main board and and attach the TV to power, the back light comes on.

Based on something I read on a similar post, I checked the 1117 regulator on the main board and found no voltage on any of 3 pins. Not sure if this test means anything but thought I would...