Samsung tv

[Samsungpos]

Hey guys, i'm working on a project and wanted to use my small samsung tv for my display, I don't know the technology, but basically the buttons were just engraved symbols(power logo, +, -, etc) and when I gently put u finger on them it would turn it in turn the volume down etc.  the motherboard that has the wires connecting it says stuff like "IR, IR PWR, IR GND, so I can only assume it's infrared.  Anyway, this technology isn't feasible for my project so I opened it and am trying to install a momentary push button to power it on.  Logic says that if I gave the tv power and connected the button to the IR PWR and IR GND then I would be good to go.  Well I tried it and no dice.

So now i'm lost, wondering if i'm even wiring in the right place, I can take a pic for u guys to see, I just want what I thought would be an easy step to be over with...

[matsadona]

Yes, some pictures showing the exact circuitry would be good. Shouldn't be any rocket science behind this, but without any details we could only guess.

[Samsungpos]

Yes, some pictures showing the exact circuitry would be good. Shouldn't be any rocket science behind this, but without any details we could only guess.

My thoughts exactly, I figured this would be a simple step while waiting on the more complex stuff, so when the tv didn't come on when I connected the button to what I presumed was the PWR and GND, I was pretty frustrated, here are the pics.

[matsadona]

Hm... Perhaps there is a sub-board with some logic circuitry? So the pins PWR and GND might be for powering the sub-board, and the other pins are some kind of serial communication?
Could you get some pictures of that board as well?

[Malenko]

Hm... Perhaps there is a sub-board with some logic circuitry? So the pins PWR and GND might be for powering the sub-board, and the other pins are some kind of serial communication?
Could you get some pictures of that board as well?

^This.  There is probably a small board behind were the "buttons" were. 

[Samsungpos]

Hm... Perhaps there is a sub-board with some logic circuitry? So the pins PWR and GND might be for powering the sub-board, and the other pins are some kind of serial communication?
Could you get some pictures of that board as well?

^This.  There is probably a small board behind were the "buttons" were.

O...m...god...so obviously there is a second board that those wires at the top run to.  I have never seen the front of it because it's super super glued to the bezel and I have tried to pry it off.  I just thought those were the buttons for the touch and nothing else and haven't given too much thought how the touch buttons and IR work...but...and stay with me here.  What if the board takes the signal and then behind the power button logo that you simply touch to power the tv is on...what if all that is are two leads on the board.  So when you touch ("press") the button it finger is just cool eyeing the circuit to activate the button...in which case I didn't need to wire the button to the video board. I would have wired it to the sub board leads for that "button"...damnit and I've already cut off that connector and lost it.  I can just repurchase the sub board and cable if someone tells me my logic isn't completely stupid...thanks guys.

[matsadona]

Regardless of construction there should be some kind of input that could be modified. If not as a normally open circuit perhaps as injecting some kind of electrical signal.

[Samsungpos]

Regardless of construction there should be some kind of input that could be modified. If not as a normally open circuit perhaps as injecting some kind of electrical signal.

Agreed, I was finally able to pry the sub board from the bezel.  I can understand the connectors that would send the current to activate this as an IR receiver, but whatever wizardry allows me to physically touch a copper dot to activate controls is beyond me.  As you see from the back, I can't even tell what NO circuit would be closed when this copper is touched...

[matsadona]

Perhaps you could expose the traces if you carefully scrape off that coating...  and find some place to solder on some wires to a switch.