No display, No audio, six times blinking Standby LED on Samsung LED TV UA40D6600WRMXL

[devbh]

Hi, I am having problems with my samsung LED TV, MODEL:UA40D6600WRMXL. While watching the tv, distorted vertical colored lines appeared for few seconds and went away, it came back second time for few seconds and this time the TV blacked out with no audio no display. I shutdown the TV, completely disconnecting the power cord and turned it on after 15-30 minutes, but no display no audio, the red power LED blinks six times and turns off. Noticed that moving the fingers over the TV buttons on the back side, flickers the power LED but no does not show anything on the TV. Performed the flashlight test, no display is seen. Also hearing repeated "clicks" from the power supply side of the TV once turned on.

No LED backlight is seen even after disconnecting the cable to the main board. How do I check the power supply board and its voltages. Power supply board is MODEL:PD46B2N_BDY, CODE:BN44-00427C.

Appreciated any troubleshooting help.

[nomoresonys]

Re: No display, No audio, six times blinking Standby LED on Samsung LED TV UA40D6600W

Test connector from mainboard to powerboard on powerboard side with all boards hooked up, test with tv plugged in but off then hit power, report both conditions here, give pin number, pin description/name and condition both off and when you hit power on. Procedure in second link below in signature if needed. meter set at 20 vdc.

[devbh]

Re: No display, No audio, six times blinking Standby LED on Samsung LED TV UA40D6600W

PIN # with powerboard to mainboard cable connected ; cable disconnected
1 OD_LE 2.85v (fluctuates when there is click sound) ; 2.74v
3 OD_ON 3.24v (fluctuates when there is click sound) ; 3.22v
5 GND 0v ; 0v
7 B13V 12.78v (fluctuates when there is click sound) ; 2.78v
9 B13V 12.78v (fluctuates when there is click sound) ; 2.78v
11 Vamp 12.78v (fluctuates when there is click sound) ; 2.78v
13 Vamp 12.78v (fluctuates when there is click sound) ; 2.78v
15 GND 0v ; 0v
17 B5V 5.64v (goes to 3.87v on clicking sound, comes back) ; 5.36v
19 B5V 5.64v (goes to 3.87v on clicking sound, comes back) ; 5.36v

PIN # cable connected; cable disconnected
2 PWM4 0v ; 0v
4 PWM3 0v ; 0v
6 PWM2 0v ; 0v
8 PWM1 0v ; 0v
10 B13V 12.78v ; 2.78v
12 BLU 0v ; 2.98v
14 GND 0v ; 0v
16 GND 0v ; 0v
18 A5V 5.34v ; 5.36v
20 PS 3.32v ; 4.11v

Capacitor voltages:
Voltages at the 2 high voltage capacitors (CP811S and CP812S) are at 388v goes to around 344v on click sound and comes back
Voltages at C9831, C9832, C9817, C9818 are at 98v goes to around 91v on click sound.

[nomoresonys]

Re: No display, No audio, six times blinking Standby LED on Samsung LED TV UA40D6600W

Think you misunderstood, you dont disconnect cable, you just measure voltage in standby, which is tv plugged in but power off, then you hit power button, then report both readings, we're checking voltages and checking to see if some change state when power is applied.

[devbh]

Re: No display, No audio, six times blinking Standby LED on Samsung LED TV UA40D6600W

as soon as plug the power cord in, the tv power LED blinks six times and goes goes off, not sure at this stage the TV is powered on or not. How can i know for sure if the TV is off with the power cord connected.

[budm]

Re: No display, No audio, six times blinking Standby LED on Samsung LED TV UA40D6600W

PIN # cable connected; cable disconnected
2 PWM4 0v ; 0v
4 PWM3 0v ; 0v
6 PWM2 0v ; 0v
8 PWM1 0v ; 0v
10 B13V 12.78v ; 2.78v
12 BLU 0v ; 2.98v
14 GND 0v ; 0v
16 GND 0v ; 0v
18 A5V 5.34v ; 5.36v
20 PS 3.32v ; 4.11v

Are you 100% sure that when you disconnect cable between power supply and main board you only has 2.78V on B13V? If you look at your report, you will see that PS-ON pin 20 has 4.11V whcich mean PS-ON is present so the B13V should also be present since it is present when all cables are in place and you also have PS-ON of 3.2V.
Are you also 100% sure you have 0V on all PWM pins?
We also need good clear pictures of the whole backside of the TV showing all the boards so we see what we are dealing with.

[devbh]

Re: No display, No audio, six times blinking Standby LED on Samsung LED TV UA40D6600W

I will recheck and send

[devbh]

Re: No display, No audio, six times blinking Standby LED on Samsung LED TV UA40D6600W

checked the voltages again with PB to MB cable disconnected, all voltages are same as previously reported except for pin B13v is 12.78v and not 2.78v.

PIN # cable connected; cable disconnected
2 PWM4 0v; 0v
4 PWM3 0v; 0v
6 PWM2 0v; 0v
8 PWM1 0v; 0v
10 B13V 12.78v; 12.78v
12 BLU 0v; 2.98v
14 GND 0v; 0v
16 GND 0v; 0v
18 A5V 5.34v; 5.36v
20 PS 3.32v; 4.11v

[devbh]

Re: No display, No audio, six times blinking Standby LED on Samsung LED TV UA40D6600W

here's the pic of back side of the tv, the pics are not so good, hope they are ok. Will send more pics of PS and MB boards

[devbh]

Re: No display, No audio, six times blinking Standby LED on Samsung LED TV UA40D6600W

here's another pic

[devbh]

Re: No display, No audio, six times blinking Standby LED on Samsung LED TV UA40D6600W

hi budm, any further steps you can help with. let me know if need to provide any details...

[nomoresonys]

Re: No display, No audio, six times blinking Standby LED on Samsung LED TV UA40D6600W

Try heating up the powerboard with a hairdryer, see if tv comes on or anything changes, many times clicking can be a bad capacitor.

[nomoresonys]

Re: No display, No audio, six times blinking Standby LED on Samsung LED TV UA40D6600W

Could try unplug backlight connector, see if clicking stops, do you get the clicks with the cable from powerboard to mainboard unplugged? ALWAYS unplug tv from outlet before unhooking cables or anything then plug tv in after to avoid any bad power surges etc.

[devbh]

Re: No display, No audio, six times blinking Standby LED on Samsung LED TV UA40D6600W

There is no clicking with power board to main board cable disconnected, for both with or without LED back-lights connectors plugged and unplugged.

Also all the capacitors look good no bulge and no leaking caps.

[devbh]

Re: No display, No audio, six times blinking Standby LED on Samsung LED TV UA40D6600W

what should be the voltages on the all the power board connectors in a working set.

[devbh]

Re: No display, No audio, six times blinking Standby LED on Samsung LED TV UA40D6600W

Here's the picture of the powerboard

[nomoresonys]

Re: No display, No audio, six times blinking Standby LED on Samsung LED TV UA40D6600W

"for both with or without LED back-lights connectors plugged and unplugged." Does this mean there is or isn't clicking with backlights unplugged?

[devbh]

Re: No display, No audio, six times blinking Standby LED on Samsung LED TV UA40D6600W

1. with PB to MB cable unplugged and LED back light cables plugged, no clicking sound
2. with PB to MB cable unplugged and LED back light cables also unplugged, no clicking sound

[nomoresonys]

Re: No display, No audio, six times blinking Standby LED on Samsung LED TV UA40D6600W

Does it click with ONLY the backlights unplugged?

[nomoresonys]

Re: No display, No audio, six times blinking Standby LED on Samsung LED TV UA40D6600W

Here's some backlight testing, there may be more in depth videos there, this should give you the general idea: https://www.youtube.com/watch?v=uIrlbsbiltY