Can anyone tell me how i can bridge the contacts on my screen power control board so that it will always be on when it is plugged in? (middle one)

 

By "always on" do you mean, "not in standby mode" or do you want to do something with the supply? It looks like battery contacts, so I guess you want to power them from something else?

 

By "always on" do you mean, "not in standby mode" or do you want to do something with the supply? It looks like battery contacts, so I guess you want to power them from something else?

Hi, They are not battery contacts, they are touch sensitive buttons....

 

Hi, They are not battery contacts, they are touch sensitive buttons....

So back to my original question. What do you mean by always on? I am assuming you mean disabliing "standby" or "sleep" mode. Can you clarify?

 

Hi Sorry,

This will be used for my N64 portable build, at the moment when you add 12v to the monitor you have to press the button on the front for it to turn on.

I want it to automatically turn on when the 12v is supplied. I.e. by bridging the contact somehow

Cheers

 

Hi Sorry,

This will be used for my N64 portable build, at the moment when you add 12v to the monitor you have to press the button on the front for it to turn on.

I want it to automatically turn on when the 12v is supplied. I.e. by bridging the contact somehow

Cheers

I have a similar one, it automatically "wakes up" from "sleep" upon receiving an input signal on the HDMI input. Have you tried using it with the N64 input signal to check? I'm sure if you boot the console up at the same time as turning on the monitor it will most likely achieve what you need it to do (without bridging any contacts).

 

Unfortunately it doesn't do that with mine, you have to physically touch the button...

 

Looking at the keypad pcb, the wires are +/-/ir/key. So it needs a serial data to tell the motherboard to power up,. I would use a relay with a 555 powered from the 12V to give a pulse on power up for say 5 seconds which shorts the "On key" out.

 

I don't think you will be able to simply bridge the contacts if the buttons are capacitive touch sensors. There's a few different types and the implementation of each differs slightly. see here to read more: https://www.allaboutcircuits.com/technical-articles/introduction-to-capacitive-touch-sensing/

I would probably look at replacing the controller. Take the serial number off the back of the screen and type it into ebay, you can usually buy a full controller from China cheap.

 

Looking at the keypad pcb, the wires are +/-/ir/key. So it needs a serial data to tell the motherboard to power up,. I would use a relay with a 555 powered from the 12V to give a pulse on power up for say 5 seconds which shorts the "On key" out.

Thanks, How would i go about this, i.e. circuit design/componants

 

The keypad chip is an HC8T0506.

Datasheet in Chinese..

https://www.google.co.uk/url?sa=t&source=web&rct=j&url=http://www.huacheng-tek.com/mc-download.html?id=204&ved=2ahUKEwj16erjjd3YAhUqL8AKHRQyAHEQFjAAegQIDhAB&usg=AOvVaw1THum6m8zGmeMikxo8YEkm

 

Thanks but what does this mean? Lol

 

It's how the chip works and how to connect it.

Looking at the circuit, it looks like it uses the AC signal from your body to operate it.

You can try to link the "ON" spring to ground to see if it powers up.

Can you post pictures of the main circuit board chips.

 

It's how the chip works and how to connect it.

Looking at the circuit, it looks like it uses the AC signal from your body to operate it.

You can try to link the "ON" spring to ground to see if it powers up.

Can you post pictures of the main circuit board chips.

No Problem,

 

Mike, Would you kindly indulge my curiosity and post the serial number / model number / details from the sticker on the back of the screen?

 

Mike, Would you kindly indulge my curiosity and post the serial number / model number / details from the sticker on the back of the screen?

Half of its covered up.......

 

OK, I was wondering if a cheap replacement driver board was available but I won't know without the serial.

Looks like you best bet now is with Dave's suggestion above. Have you tried triggering the sensor with a pulse yet?

 

OK, I was wondering if a cheap replacement driver board was available but I won't know without the serial.

Looks like you best bet now is with Dave's suggestion above. Have you tried triggering the sensor with a pulse yet?

No haven't tried anything yet