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

[budm]

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

That pen is for probing for active AC for electrician, not going to be use for trouble shooting the TV.
I hope you get the user manual for that meter, it looks like it is made for Electrician.
Please read the manual.
https://www.sperryinstruments.com/en...s-DM2A-Digital

[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.

Hy bud.. ok so my super gave me his sperry mulitmeter. He also gave me a "pen" to check for other measurements. I assume the pen will be used to check the led strips. Let me know if both these devices will suffice and how to start fixing my tv.. thanks bud.

[budm]

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

Hi bud.. I did reset the tv through my roku remote while the it was dark. After that I'm able to see "TCL Roku TV" flash once for a split sec but thats it. I can repeat this many times but the tv still wont turn on. Given this do you still think its an led strip issue or something else?

Btw I'm trying to get that multimeter.

Also if its an led strip issue and I buy led strips, do I have to solder them onto the tv?

1) We cannot tell anything until we do some measurement first.
2) If it is bad LED strips, then you will need to dissemble the LCD panel to get to the LED strips. Are good at mechanical assembly/disassembly? This is large panel so a very good chance of breaking it if you have no experience.

[nomoresonys]

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

Can pick up a basic multimeter for about 10 bucks at the big box stores.

[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.

Hi bud.. I did reset the tv through my roku remote while the it was dark. After that I'm able to see "TCL Roku TV" flash once for a split sec but thats it. I can repeat this many times but the tv still wont turn on. Given this do you still think its an led strip issue or something else?

Btw I'm trying to get that multimeter.

Also if its an led strip issue and I buy led strips, do I have to solder them onto the tv?

[budm]

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.

[koolx]

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

1) Well, right now we have no idea what we are dealing with since we do not have the TV in front of us to look at.
2) You need to have digital mutli meter and know how to use it to perform some Voltage testing, if you do not have any tools then all you can do is visual inspection or just start buying boards to see if it will fix the problem or not but if you have bad backlights problem then buying boards will be useless, that is why Voltage testing is needed to help narrowing down the problems.

Hi budm. I have a friend who might have a multimeter. If I do get it, will you help me test which components to zero in on on my tv?

[budm]

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

1) Well, right now we have no idea what we are dealing with since we do not have the TV in front of us to look at.
2) You need to have digital mutli meter and know how to use it to perform some Voltage testing, if you do not have any tools then all you can do is visual inspection or just start buying boards to see if it will fix the problem or not but if you have bad backlights problem then buying boards will be useless, that is why Voltage testing is needed to help narrowing down the problems.

[koolx]

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?

Hi budman. I havent done any voltage testing since I'm not versed in that field of electronics. What do you suggest?

[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?

[koolx]

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

So no indicator light on the front of the tv at all?

The screen is dark but you can still make out the menu if you look hard enough. It's a backlight issue to my knowledge.

[nomoresonys]

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

So no indicator light on the front of the tv at all?

[koolx]

Hi guys.. I got a tcl tv model 55S425 with no picture, no backlight and no sound. Do you think its an led or main board issue? What do you suggest I buy to fix it?