Samsung UE32F500 no power, no standby light

[Bbb_bhavesh]

Hi.
I got problem samsung ue32f5000 led tv. Last night it was working perfect, suddenly when i start today there is no power light or stand by light. I check the forum and do some test with power board. Its BN44-00605A. I check with voltage and i am getting 109v reading at Led connection without Led connection. Also when i unplug the main board cable from power board all Led light is glow. So i am confused is it problem with Power Board or Main board. Any one have step by step to check list for foult finding.
Thanks for valuble time.

[thoma]

Re: Samsung UE32F500 no power, no standby light

Read LCD TV and Monitor basic troubleshooting guides in this forum!

https://www.badcaps.net/forum/showth...=25810&page=14

https://www.badcaps.net/forum/showth...hlight=samsung

Go to search and put in samsung there are a lot of threads!!!

regards thoma!

[budm]

Re: Samsung UE32F500 no power, no standby light

Report the DCV readings of all the pins of the connector CNM803, make sure to put pin names and pin number in front of the DCV readings so we can see what we are missing.
Pictures provided by shopjimmy.

[Bbb_bhavesh]

Re: Samsung UE32F500 no power, no standby light

Thanks for your reply budm & thoma..

I have checked DCV readings of all the pins of the connector CNM803 as below:

Without Main board connection
4.70v 1
0 3
4.70v 5
0 7
0 9
5.24v 11
3.12v 13

2 12.86v
4 12.86v
6 12.86v
8 12.86v
10 0
12 5.24v
14 5.24v


When i Connecting Main board with power board and checked the same connection i got reading 0 (zero) for all pins.

Also i notice some burn mark on PCB at CM801 capacitor. When i checked capacitor its looks it working all right.

[budm]

Re: Samsung UE32F500 no power, no standby light

It will be nice if you put the name of each pin.
You must have count the pin wrong.
For example:

2 12.86v
4 12.86v
6 12.86v
8 12.86v
If you list the name of each pin the you would have known that pin 8 is GND so you cannot have 12.86VDC at pin 8.
Pin 8, 9, 10 are GND.
Post #3 request ' make sure to put pin names and pin number in front of the DCV readings '

[Andrew F. Ali]

Re: Samsung UE32F500 no power, no standby light

Main Bd issue I think, as the LED Backlights come on with the Jack to the Mn Bd disconnected.

[budm]

Re: Samsung UE32F500 no power, no standby light

Main Bd issue I think, as the LED Backlights come on with the Jack to the Mn Bd disconnected.

Is he talking about LED backlights?

"Also when i unplug the main board cable from power board all Led light is glow."

If that is the case, then I agree that he has problem some where on the main board.

[Bbb_bhavesh]

Re: Samsung UE32F500 no power, no standby light

Thank you for your reply..

I have checked DCV readings of all the pins of the connector CNM803.

Pin no
2 4.70v
4 0v
6 4.70v
8 0v
10 0v
12 5.24v
14 3.12v

1 12.86v
3 12.86v
5 12.86v
7 12.86v
9 0v
11 5.24v
13 5.24v

I think i wrote down in wrong pin number first time.
Why its showing 0 voltage when main board connecting with power board and power supply is switch on? As soon as i disconnect with main board from power supply board i got ALL LED light lit and shows voltage reading. How do i checked main board is working or not?

[budm]

Re: Samsung UE32F500 no power, no standby light

The power supply board has pull-up resistors to pull up PS-ON and BL-ON pin high so you can do the self test to find out if the Power supply, LED driver, and the LED backlitghts are OK or not.
When you have the board connected to the main board, if the main board is bad it will not allow the control pins to go high (they should if the main board is OK). Another tip that shows the main board is the problem is that you do not have any indicator lights.

[Bbb_bhavesh]

Re: Samsung UE32F500 no power, no standby light

Hi. Thanks for reply.

I follow with your above post and check the power board. And tcon board. Also i did search into forum to fault findung. I can not figure out how to find problem in LED driver board. How do i test that.

[vinceroger69]

Re: Samsung UE32F500 no power, no standby light

im pretty sure by reading your posts you have a mainboard fault what is the part number of the mainboard

[budm]

Re: Samsung UE32F500 no power, no standby light

Hi. Thanks for reply.

I follow with your above post and check the power board. And tcon board. Also i did search into forum to fault findung. I can not figure out how to find problem in LED driver board. How do i test that.

As I indicated, if you disconnect the cable between the power supply and the main board and then you apply the power to the TV and the backlights come on and stay on then your power supply/LED driver board and the LEDs are OK, simple as that.

[CapLeaker]

Re: Samsung UE32F500 no power, no standby light

Hi. Thanks for reply.

I follow with your above post and check the power board. And tcon board. Also i did search into forum to fault findung. I can not figure out how to find problem in LED driver board. How do i test that.

Don't get ahead of yourself, just do that what budm already said. If it makes you feel better, I think the problem is the main board, same as already others have mentioned.

[Bbb_bhavesh]

Re: Samsung UE32F500 no power, no standby light**** solved

Thanks you very much guys..
I got main board from ebay and changed. Its work.


Thanks a lot budm, Capleaker & vinceroger69.
😊😊😊😊😊☺

[Bbb_bhavesh]

Re: Samsung UE32F500 no power, no standby light

Is there any way i canfind where its problem in main boad? Its just for curiosity.

[vinceroger69]

Re: Samsung UE32F500 no power, no standby light

Glad you managed to fix your set and thanks for the update. mainboard problems are hard to trace and repair imo unless its something like a fuse/capacitor/resistor or voltage regulator etc the main processor seems to be a common failure with bad bga soldering etc.

[budm]

Re: Samsung UE32F500 no power, no standby light

Thanks for follow-up, please make sure to turn down the backlights level as low as you can so the LEDs will last much longer.

[shh-phd]

Re: Samsung UE32F500 no power, no standby light

hi
please help me

i need schematic for BN44-00605A

thankyou

[dskall]

Re: Samsung UE32F500 no power, no standby light


Wait for get manual