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Re: TCL Model 55S405 - No Pic, No Backlight, No Sound - HELP!!!
Someone wants to buy this tv from me for $90. Do you guys think its worth that I should sell it or try to fix it?Last edited by koolx; 07-07-2020, 03:07 PM.Comment
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Re: TCL Model 55S405 - No Pic, No Backlight, No Sound - HELP!!!
Probably a pretty good tv you have there, probably just a matter of what's wrong with it, which may be found with proper testing but it's work and not always easy if inexperienced with electronics.Comment
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Re: TCL Model 55S405 - No Pic, No Backlight, No Sound - HELP!!!
Hi nomoresonys. I hear ya. I'm experienced with replacing parts on laptops and I built my own custom PC if that qualifies me for a "techie." Not completely inexperienced by those standards. It does seem like an easy fix just a matter of dialing in on what part should be replaced.
The tv itself is enticing me to keep it to fix it. The only drivers keeping me from embracing it fully are the viewing angle which gets cloudy and the low brightness level. I want a bright tv not one where I have to struggle to make out images. But if you think these factors are mitigating let me know.
Looks like budman is busy working today. Hope he reads this today and get his input.
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Re: TCL Model 55S405 - No Pic, No Backlight, No Sound - HELP!!!
If you got a meter working properly, try the tests in post #20, they're pretty simple, the test is on the cold side of powerboard, the HOT/PRIMARY side is the side with the DEADLY VOLTAGES and you MUST be very careful when working in that area, number 2 below shows a video tutorial.Comment
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Re: TCL Model 55S405 - No Pic, No Backlight, No Sound - HELP!!!
I'm waiting for your test result in my post #20.
Did you read it and understand it?
Did you verify that the meter is good for sure at this point?Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: TCL Model 55S405 - No Pic, No Backlight, No Sound - HELP!!!
Hi budman. I will get those readings out to you. I ran into an unexpected snag today. All I ask is just a little bit more patience. Thank you budman.Comment
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Re: TCL Model 55S405 - No Pic, No Backlight, No Sound - HELP!!!
Well I was referring to the panel sticker info, which is on the back metal chassis of tv on a sticker, you need to take the back cover off to access it, guess you could see if there is a service code number on the back cover, might start with srv code or sum such.Comment
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Re: TCL Model 55S405 - No Pic, No Backlight, No Sound - HELP!!!
Figured it would be because you said they were old, there are 2 suggestions there, the other is just look at the back cover without removing and see if there is a service code number, other than that, I don't know.Last edited by nomoresonys; 07-08-2020, 09:38 AM.Comment
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Re: TCL Model 55S405 - No Pic, No Backlight, No Sound - HELP!!!
Yes indeed.Comment
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Re: TCL Model 55S405 - No Pic, No Backlight, No Sound - HELP!!!
So where is the follow-up?Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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this tv is throwing me for a loop. do samsung tvs no longer have the backlight self test feature built into the power supply?
i tested the backlight with my LED tester and it lights up both strips. one of them reads 100v and the other reads 63.7v.
unplugged mainboard from power supply but left backlight plugged in, and then plugged psu wall power in. expected to see backlights light up but see nothing.
according to how ive diagnosed in the past, this would almost always be a bad power supply. replacement power supply was cheap like 20$ from ebay. but still i get not even... -
Hi, I have a Samsung UE50TU with:
- sound and backlight, but no picture
- when it arrived, it had a picture for a few seconds
- it keeps rebooting
- without ribbon cable between the two panel boards, it does not reboot but I have no picture
- without cable between mainboard and lcd panel, it does not reboot (but obviously i have no picture)
- when i try a tape fix, its keeps rebooting, unless I tape off pin 1 (the innermost pin). In that case it does not reboot but I have no picture.
- without cable between mainboard and lcd panel and with a jumpered... -
Just picked up an iMac powerpc for $1 at auction. changed pram. This is working. Problem, barely any sound. I have everything cranked up in software, reset nvram/pram - nada. I do get sound ONLY if I plug in a powered speakers in headphone port. I do not get the startup bong.
I get almost no sound with normal headphones. I mean, you can barely hear it. Took the board out and by eye found these 2 inductors broken. Not sure if they are for sound. Speaker is also plugged in and I tried a normal pc speaker in its place - still zilch. Are these inductors the culprit?
I cannot find any schematics... -
so i took out one of my spare gigabyte ep35-ds3r mobos from storage for use to do some cpu, ram and video card testing of stuff i bought from ebay and got for free from momaka. he bought 50 e8400 cpus for cheap from ebay some years ago and i decided to help him relieve him of some of his supply since he had waaaay too many!!
what did we say about hoarding too much stuff and depriving others of them?! *cough* socialism *cough* lol! 
i had to blow some dust off the board and heatsinks with the datavac as i didnt clean it up before putting it in storage. after finishing... -
I have a 60 inch Samsung UN60EH6000F flatscreen TV. The screen went black a few months ago Sound is good, backlight is good, no menu. I replaced the TCon board with a used board purchased from Ebay. It worked fine for a 3-4 months, then the screen started ‘fading' back. Once again, sound is good, backlight is good, no menu. However, this time the picture looks fine for about 10-15 minutes, then fades back. If I power cycle the TV, the display reappears, for another 10-15 minutes, then fades black again. Repeatable ever time.
I ordered a supposedly ‘new' Tcon board this time, and...
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