TCL Model 55S405 - No Pic, No Backlight, No Sound - HELP!!!

[budm]

Re: TCL Model 55S405 - No Pic, No Backlight, No Sound - HELP!!!

What I am saying is that you are told that the meter is good 'He assures me the tool is working correctly' but when you take the readings and the meter only shows 79V, then if I am the supe I would have great doubt that the meter is good by looking at the lights and appliance in your house, that would have giving the clue that the meter is wrong. How did the supe figure out that the meter is working correctly?
Surge protector is not safety device for preventing you from being electrocuted, it is for protecting the connected equipment.
Did you look all the outlets in your house to see if there is GFCI outlet in your house some where, my house is built in 1986 and required to have GFCI for both of my bath room and the kitchen, I do not know how old your house is

[koolx]

Re: TCL Model 55S405 - No Pic, No Backlight, No Sound - HELP!!!

Well, I expect your super to tell you right away that your AC is too low, based on the meter is GOOD, and should disconnect your appliance and call the power company right away to fix the problem.
Is he the one that is going to help you troubleshooting the TV?
Are you really show about troubleshooting this TV? I do not want anyone to get killed.

I'm a bit confused by your analysis. If the readings on that multimeter are sporadically inaccurate then it follows that theres something electronically wrong with the multimeter per se, not the wiring in my house. If not it would be common sense to expect all my devices to be unable to function correctly, namely my gaming PC which is sensitive to electric changes. As I've mentioned before I will buy new batteries for the other multimeter to test.

I am grateful for your concern for my safety. Just so you know, I doubt I have a GFCI outlet in my bathroom. As such I will ask my super for his supervision over testing the tv and will try to find a surge protector for extra precaution. Will let you know tomorrow. Thanks.

[budm]

Re: TCL Model 55S405 - No Pic, No Backlight, No Sound - HELP!!!

BTW, Did you read my post #20 and understand what you have to do, and knowing how the count the pins correctly, etc.?

[budm]

Re: TCL Model 55S405 - No Pic, No Backlight, No Sound - HELP!!!

Well, I expect your super to tell you right away that your AC is too low, based on the meter is GOOD, and should disconnect your appliance and call the power company right away to fix the problem.
Is he the one that is going to help you troubleshooting the TV?
Are you really show about troubleshooting this TV? I do not want anyone to get killed.

[koolx]

Re: TCL Model 55S405 - No Pic, No Backlight, No Sound - HELP!!!

"He assures me the tool is working correctly."
So what does your supe do for living?

hes a super.

[nomoresonys]

Re: TCL Model 55S405 - No Pic, No Backlight, No Sound - HELP!!!

"He assures me the tool is working correctly."
So what does your supe do for living?

[budm]

Re: TCL Model 55S405 - No Pic, No Backlight, No Sound - HELP!!!

"He assures me the tool is working correctly."
So what does your supe do for living?

[koolx]

Re: TCL Model 55S405 - No Pic, No Backlight, No Sound - HELP!!!

Hi bud and diah. I retested it on the 300 ac scale. I get very abnormal readings that jump eccentrically from 1.0 - 155v. I think its possible that this multimeter is busted. I'll go ahead and use the sperry multimeter. But I need to buy batteries for it. I'll let you know by tonite or tomorrow when I test it. Thanks for your patience with me!

[budm]

Re: TCL Model 55S405 - No Pic, No Backlight, No Sound - HELP!!!

If the Voltage is really that low, that is brownout condition which can easily damage you fridge and air conditioner. You lights will also be dim through out the house.
How about on the 200V AC scale? How about check some DC V on battery? Also check the meter's batteries. I really doubt that you are having only 79V AC at your house, if you do you better unplug your fridge. What does the Sperry meter show?
I am surprised that your computer is still working if it is truly 79V AC.
https://quickelectricity.com/protect...ing-brownouts/

[Diah]

Re: TCL Model 55S405 - No Pic, No Backlight, No Sound - HELP!!!

if you put yours DM on 200 instate 300 as at yours pictures then measure the outlets

[koolx]

Re: TCL Model 55S425 - No Pic, No Backlight, No Sound - HELP!!!

BTW, I need closed up pictures of power supply board LED connector P1 (connected to the power supply board) so I can see which wire is connected to which pin of the connector.

HI bud. I'm now using another multimeter made by MCM Electronics, model# 72-7940. The super tested it out on my house outlet which showed around 78 volts. But he says it should read 110 - 130 volts. We tested it on most of the outlets in my house which showed the same reading. He assures me the tool is working correctly. I've posted a pic of this for you. Let me know if the dial is set correctly.

As to the boards here are updated pics. Hope they are to your liking!

[koolx]

Re: TCL Model 55S425 - No Pic, No Backlight, No Sound - HELP!!!

Please verify the TV full model number.
According to shopjimmy, the boards for the 55S425 do not show the power supply used in your TV, your power supply board is P/N 08-L14TWA2-PW220AL
There are many versions of the same TV model.
https://www.shopjimmy.com/tcl-08-l14...wer-supply.htm
According to SJ, your power supply board is used in 49S405TDAA and 55S405LGAA.

Hi bud.. the full model# is: 55S405TAAA.

I'll work on the voltage tomorrow.

.

[budm]

Re: TCL Model 55S425 - No Pic, No Backlight, No Sound - HELP!!!

BTW, I need closed up pictures of power supply board LED connector P1 (connected to the power supply board) so I can see which wire is connected to which pin of the connector.

[budm]

Re: TCL Model 55S425 - No Pic, No Backlight, No Sound - HELP!!!

OK, as you can see, Red connector P2 of the power supply board has pin names located on the bottom side of the board. The exposed pin on the top side of the board are ODD number pins that you can carefully check the Voltage of each pin easily, the EVEN number pins, you will need to use skinny probe to probe the pins from the wire entrance side side of the connect, all the Voltage testing has to be done with all connectors in place.

Turn the TV on and then check the Voltage on each pin, Black probe of the meter connected to the metal chassis of the TV for meter ground reference:
Report the reading as shown in the format below. Make sure to count the pin correctly.
PIN 1: PDIM (PWM Dimming control) = xxx V
PIN 2: BL-ON = xxx V
PIN 3: GND = xxx V
PIN 4: P-ON (PS-ON:mpower supply turn on control signal) = xxx V
PIN 5: N.C. (NO CONNECTION)
PIN 6: A_DIM (Analog Diming control) = xxx V
PIN 7: GND = xxx V
PIN 8: GND = xxx V
PIN 9: 12VDC = xxx V
PIN 10: 12VDC = xxx V
PIN 11: 12VDC = xxx V
PIN 12: 12VDC = xxx V
PIN 13: 12VDC = xxx V
PIN 14: 3D_EN (3D MODE Enable) = xxx V

Pictures provided by shopjimmy.

[budm]

Re: TCL Model 55S425 - No Pic, No Backlight, No Sound - HELP!!!

Sure I'll have the super help me with that. But fyi I'm not sure you read the last part of my last reply. I edited it after posting it. Just wanted you to know that I made a typo in the title of my thread. The correct model of my unit is 55S405, NOT 55S425. I sent a note of this to the mod and hopefully he should correct it.

I'll let you know when I'm ready for your instruction. Thanks bud!

.

OK, these are the boards used in your TV model 55S405.
https://www.shopjimmy.com/catalogsea.../?q=55S405LGAA

[budm]

Re: TCL Model 55S425 - No Pic, No Backlight, No Sound - HELP!!!

Please verify the TV full model number.
According to shopjimmy, the boards for the 55S425 do not show the power supply used in your TV, your power supply board is P/N 08-L14TWA2-PW220AL
There are many versions of the same TV model.
https://www.shopjimmy.com/tcl-08-l14...wer-supply.htm
According to SJ, your power supply board is used in 49S405TDAA and 55S405LGAA.

[koolx]

Re: TCL Model 55S425 - No Pic, No Backlight, No Sound - HELP!!!

1) You should try setting meter to read DC V and measuring some battery Voltage such as AA, car battery to see what it shows on the meter just to get to know your meter because correct DATA of your measurement is very important for us.
2) Your bath room outlet should be protected by the GFCI so you can use the outlet with extension cord. https://www.dfliq.net/blog/what-is-gfci-outlet/

Sure I'll have the super help me with that. But fyi I'm not sure you read the last part of my last reply. I edited it after posting it. Just wanted you to know that I made a typo in the title of my thread. The correct model of my unit is 55S405, NOT 55S425. I sent a note of this to the mod and hopefully he should correct it.

I'll let you know when I'm ready for your instruction. Thanks bud!

.

[budm]

Re: TCL Model 55S425 - No Pic, No Backlight, No Sound - HELP!!!

1) You should try setting meter to read DC V and measuring some battery Voltage such as AA, car battery to see what it shows on the meter just to get to know your meter because correct DATA of your measurement is very important for us.
2) Your bath room outlet should be protected by the GFCI so you can use the outlet with extension cord. https://www.dfliq.net/blog/what-is-gfci-outlet/

[koolx]

Re: TCL Model 55S425 - No Pic, No Backlight, No Sound - HELP!!!

Make sure to read the meter manual first, and the TV needs to be plugged into GFCI outlet for safety then we can go from there.

So where are the pictures?
You do have GFCI outlet to plug the TV into, correct?

Hey bud.. I read the manual that youve attached. Although I'm no techie I get the gist of it.

As for a GFCI outlet, I can possibly get one from my super. I'll ask though I doubt he has one.

Below are the pics as you've requested...

***CORRECTION*** My tv is TCL model 55S405. Sorry for the typo in my original post.. I'll change it!

.

[budm]

Re: TCL Model 55S425 - No Pic, No Backlight, No Sound - HELP!!!

Please attach good clear pictures of the whole backside of the TV using 'Go Advanced' so we can see all the boards.
What Voltage testing have you done so far?

So where are the pictures?
You do have GFCI outlet to plug the TV into, correct?