TCL 65S450F no logo, bleeping sounds?

[nomoresonys]

Be careful what you wish for here. Look at German politics. They had a 3i party coalition government between SPD, FDP and Greens aka traffic light coalition (red, yellow, green). Needless to say nothing much got done.

I hear that, Seems like nothing works that they've tried so far, It's a damn shame when the countries with dictators seem to be getting more done that Our "democracy"

[CapLeaker]

O.k. Back to topic.
I just effed around with that monkey box. I’ve got no panel power (even with the LVDS disconnected) and one inductor shorted full to GND. That explains no display of any sort ( lack screen).

[lotas]

This is how it should be, in t-con there is one inductor on ground to convert negative voltage relative to ground (VOFF = VGL = VGOFF = VEEG = from -5V to -9V).

[CapLeaker]

This is how it should be, in t-con there is one inductor on ground to convert negative voltage relative to ground (VOFF = VGL = VGOFF = VEEG = from -5V to -9V).

I just just came back upstairs again and figured that one out, because the diode above it is -10V. So VGL popped right into my mind.
However, I don’t have any panel power to speak of. Maybe 1V?

[lotas]

You need to find out how the t-con (12v) is powered, where the power is supplied from and whether it is supplied in general...

[EazyBone]

You also got a ribbon that is poorly set and maybe shorting stuff

[CapLeaker]

You also got a ribbon that is poorly set and maybe shorting stuff

yeah, that I know... it still shows that in the picture as I keep "recycling" it. lol Ignore that ribbon, it sits straight for a while now.

lotas that plug on the bottom right is the speaker left. There is the same plug on the other side for speaker right. I'll see what I can measure at that point you circled tomorrow morn.

[nomoresonys]

Weird tv, who do you get help from, amazon since it's their os or tcl? amazon has a chat feature, not sure about tcl. Whenever I use a chat feature I do my damndest to keep them talking til it's fixed, if they act like they want to give up, I say I need this fixed boost me up the ladder. Sometimes you have to try the resets several times, maybe try turn tv on for a minute then just unplug it from power, then hold power button on tv while plugging in hold button til you see screen come on then let go, go for a minute, no joy, try less maybe just a 10 count or 15 then let go, play with the times like that. I can't really see any reason why this tv won't reset. Always hated fire devices because EVERY single time you turn it on it checks for updates and forces them, no choice in the matter, that's why I only bothered with one original fire tv box and one stick, some friends would buy about every one that came out.

[Diah]

this TV PSU always active. " r´thought it had only One Opto" because its Fire TV. I/O signal to drive the Panel depending on the one Soc and its firmware script. any damage at FW the Soc will be blind.

you have on MB the socket PW1 which i think its the key of supplying panel V. LVDS both had no sign of Panel V rail.

filter coil you thing it shorted from Photo its sitting on GND.

so let see the whole back of the set to follow Panel rail .

[CapLeaker]

this TV PSU always active. " r´thought it had only One Opto" because its Fire TV. I/O signal to drive the Panel depending on the one Soc and its firmware script. any damage at FW the Soc will be blind.

you have on MB the socket PW1 which i think its the key of supplying panel V. LVDS both had no sign of Panel V rail.

filter coil you thing it shorted from Photo its sitting on GND.

so let see the whole back of the set to follow Panel rail .

Here we go. Went back to it for a bit this morning. I do have 12Vdc panel power on some places on the board, but nothing going to the screen. See pictures attached. The LVDS data lines has no signals either. PW1 is just going to the PSU.
I am not convinced the panel is dead. I think it is that main board that’s faulty.

[Diah]

Here we go. Went back to it for a bit this morning. I do have 12Vdc panel power on some places on the board, but nothing going to the screen. See pictures attached. The LVDS data lines has no signals either. PW1 is just going to the PSU.
I am not convinced the panel is dead. I think it is that main board that's faulty.

yours Panel didn't need 12VCC... as i wrote before its ONE Soc. system design like the way on Mobile but with large screen .. I2C on this One Soc for Video / panel worked within the section of Kernel at Firmware... yours Kernel distributed much likely during update or et turned off and on again ..
you still have 5V USB VCC and first power _On in tact ... firmware flashing are the answer always no HW issue at my eyes.

[nomoresonys]

yours Panel didn't need 12VCC... as i wrote before its ONE Soc. system design like the way on Mobile but with large screen .. I2C on this One Soc for Video / panel worked within the section of Kernel at Firmware... yours Kernel distributed much likely during update or et turned off and on again ..
you still have 5V USB VCC and first power _On in tact ... firmware flashing are the answer always no HW issue at my eyes.

That sounds very likely, probably why it refuses to reset.

[nomoresonys]

These fire tvs are way too dependent on being online, what if someone just wanted to hook up an antenna and watch over the air non-compressed programs like the person in the LG thread, is it even possible without being online? I hate always having to fiddle around with something just to look at the news or whatever, I keep it simple. Adjust the tv to be dumb and use a smart streamer, from what I understand it doesn't wear out the eMMC chip as fast either.

[Diah]

he need to take out the heatsink of the Soc and tell the name of the Soc. if its MSTAR... so the tools will help flashing

[Diah]

These fire tvs are way too dependent on being online, what if someone just wanted to hook up an antenna and watch over the air non-compressed programs like the person in the LG thread, is it even possible without being online?

no need to be online to receive antenna or cable or sat.... but the set should be activated first with user profile

[nomoresonys]

no need to be online to receive antenna or cable or sat.... but the set should be activated first with user profile

Thanks Diah, I thought that should be the case, they make it pretty tough for the non-tech inclined like some seniors for example AND me.

[CapLeaker]

he need to take out the heatsink of the Soc and tell the name of the Soc. if its MSTAR... so the tools will help flashing

Thanks for post 91. That was helpful to understand why there is no 12V going directly to the panel. Never thought of it that way. The Soc is an Amilogic. So now I am out of clue. The Mstar I know, but this Amilogic thing… nope.

[CapLeaker]

no need to be online to receive antenna or cable or sat.... but the set should be activated first with user profile

I didn’t get that far. I turned it on and worked, Connected cables to it including Ethernet. Then it said new firmware found and it did its thing. So I left the room for 10mins. Came back and found the TV in this state, Nobody touched it in between.

[CapLeaker]

Thanks Diah, I thought that should be the case, they make it pretty tough for the non-tech inclined like some seniors for example AND me.

I should set this post as it being the answer.

[Diah]

Thanks for post 91. That was helpful to understand why there is no 12V going directly to the panel. Never thought of it that way. The Soc is an Amilogic. So now I am out of clue. The Mstar I know, but this Amilogic thing… nope.

you are lucky as the Soc Amlogic.. it had bootloader section on it which we can trick it with PC..connect yours TV with male to male USB with PC let see how the PC show
here we are with tools