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Old 06-25-2019, 02:32 PM   #1
beanboy33
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Default Samsung UN55ES6150F 2 blinking light x5

I have a Samsung UN55ES6150F TV with a BN44-00503A power supply board and a BN94-05656D mainboard.

An HDMI connector on my mainboard was damaged, so I remove it and tried to solder on another one. That did not turn out too well so i decided to remove the HDMI connector completly and reinstall the mainboard.

Powered on the tv and it worked for minute or two. Then the volume died. I turned off the TV to check my connections and it would not turn back on. I would get 5 blinking lights and when i went to turn it on it would change to 2 blinking lights 5 times.

I decided to order another mainboard. Installed the new main board and when power is applied i get 2 blinking lights 5 times. When i remove the cable that connects the power supply to the mainboard the back lights turn on and the blinking light is off.

Here are my voltages.

MB Connected voltages are at 0 until they jump to proper values for a second
1. B13V———————12.73 to 0
2. PWM_DIM—————3.84 to 0
3. B13V———————12.73 to 0
4. B13V———————12.73 to 0
5. Vamp———————12.73 to 0
6. BLU On_Off————0.0
7. Vamp———————12.73 to 0
8. GND———————0.0
9. GND———————0.0
10. GND——————-0.0
11. B5V———————5.27 to 0
12. A5V———————5.28 steady
13. B5V———————5.28 to 0
14. Power On_Off——.251 to 0

Big cap voltage———-392.6 to 366
Rectifier———————168.7 to 124.5

MD not Connected
1. B13V————-12.73 steady
2. PWM_DIM——-3.156 steady
3. B13V—————12.73 steady
4. B13V—————12.73 steady
5. Vamp—————12.73 steady
6. BLU On_Off——-2.94
7. Vamp—————12.73 steady
8. GND——————0.0
9. GND——————0.0
10. GND—————-0.0
11. B5V——————5.27 steady
12. A5V——————5.28 steady
13. B5V——————5.28 steady
14. Power On_Off—-3.294 steady

Big cap voltage———392 staedy
Rectifier——————-108.5 steady

Written on board
A5V:5.3V/18mA
B5V:5.3V/3.4A
B13:12.8V/2.1A
Vamp:12.8V/0.3A



Does anyone have any ideas?

Last edited by beanboy33; 06-25-2019 at 02:51 PM.. Reason: Correction
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Old 06-25-2019, 05:22 PM   #2
beanboy33
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Default Re: Samsung UN55ES6150F 2 blinking light x5

here are pictures of the boards
Attached Images
File Type: jpg 21FB5C15-6D20-4697-9D21-4A6E8EDCE9E4.jpg (406.4 KB, 4 views)
File Type: jpg B1E531D4-9707-44CB-A393-574A113D461C.jpg (408.5 KB, 8 views)
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Old 06-25-2019, 06:35 PM   #3
diif
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Default Re: Samsung UN55ES6150F 2 blinking light x5

Either your mainboard repair damaged something connected to it, or the replacement mainboard is faulty.
Check the tcon fuse and if it has a wifi module disconnect it.
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Old 06-25-2019, 06:44 PM   #4
nomoresonys
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Default Re: Samsung UN55ES6150F 2 blinking light x5

Looks like the new mainboard isn't sending the bl-on signal, where did you get it?
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Old 06-25-2019, 07:09 PM   #5
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Default Re: Samsung UN55ES6150F 2 blinking light x5

MB Connected voltages are at 0 until they jump to proper values for a second
1. B13V———————12.73 to 0
2. PWM_DIM—————3.84 to 0
3. B13V———————12.73 to 0
4. B13V———————12.73 to 0
5. Vamp———————12.73 to 0
6. BLU On_Off————0.0
7. Vamp———————12.73 to 0
8. GND———————0.0
9. GND———————0.0
10. GND——————-0.0
11. B5V———————5.27 to 0
12. A5V———————5.28 steady
13. B5V———————5.28 to 0
14. Power On_Off——.251 to 0

That PS-ON is cycling up and down so the switched B5V, B13V, and PFC Voltage is not stable. Main board is not sending steady PS-ON signal.
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Old 06-26-2019, 05:02 AM   #6
beanboy33
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Default Re: Samsung UN55ES6150F 2 blinking light x5

I disconnected the WIFI module. No difference.
Is there something I can do to confirm that I have another bad Main board?

Last edited by beanboy33; 06-26-2019 at 06:10 AM.. Reason: correction
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Old 06-26-2019, 07:07 AM   #7
budwich
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Default Re: Samsung UN55ES6150F 2 blinking light x5

track where the B5V voltage goes... it may be that some component along its route is "sucking" more current than "labelled" and the system shuts down... or that regulator / switch component has an issue.
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Old 06-26-2019, 10:35 AM   #8
nomoresonys
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Default Re: Samsung UN55ES6150F 2 blinking light x5

Usually confirms powerbord and backlights are working right when the backlights come on when remove cable from powerbard to mainboard. Do you have steady voltages with that cable removed?

Last edited by nomoresonys; 06-26-2019 at 10:37 AM..
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Old 06-26-2019, 12:20 PM   #9
beanboy33
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Default Re: Samsung UN55ES6150F 2 blinking light x5

Quote:
Originally Posted by nomoresonys View Post
Usually confirms powerbord and backlights are working right when the backlights come on when remove cable from powerbard to mainboard. Do you have steady voltages with that cable removed?
Yes, all the voltages are present and steady
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Old 06-26-2019, 01:25 PM   #10
nomoresonys
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Default Re: Samsung UN55ES6150F 2 blinking light x5

Think I would send that mainboard back, can they send you another one?
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Old 07-02-2019, 07:17 AM   #11
beanboy33
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Default Re: Samsung UN55ES6150F 2 blinking light x5

Sent back mainboard for another one. Problem fixed
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Old 07-02-2019, 07:29 AM   #12
nomoresonys
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Default Re: Samsung UN55ES6150F 2 blinking light x5

Cool beans, thanks for the followup.
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