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Home coup: the remote control button is not working, you can try this method
       Home air conditioners, TVs, and other appliances have remote controls that are convenient to use. But sometimes it's a bit of a back, and the remote control is really good, and some buttons suddenly fail. Don't worry, here is a way to teach everyone how to do it yourself.
       Many of the current remote controls have a conductive rubber-like black substance on the back of the button. When the button is pressed, it connects the two electric contacts on the circuit board, thus completing the button action. Under normal circumstances, individual keys fail or require a lot of effort to respond. Most of the places are broken. Poor contact, as shown below:
       The picture above is my own TV remote control, the power button is not sensitive, it takes a lot of effort to respond. Let's look at the open picture, the above is the button, the red is the power button, the black circle in the middle is the electric shock, the bottom is the circuit board, the upper right corner of the circuit board is the contact point corresponding to the power button, under normal circumstances, press the power button When the button is pressed, the black material will connect the two contact points on the board. Now that the black material is insensitive due to the long time of use, we need to perform some operations to make it re-conductive. The preferred material is a pencil. Because the pencil refill is mainly made of graphite, and graphite is an excellent conductor.
       Use a pair of scissors or other tools to scrape off the pencil refill and stick the powder to the black contacts. The purpose of this is to increase the conductive material.
       After scraping, apply a pencil tip to the contact to make the powder fully in contact with the electric shock and stick it tightly. After the application, wipe off the excess graphite powder with a dry paper towel, otherwise the button will be pressed until it is installed.
       Then use a pencil tip to smear the contacts on the board and wipe off the excess powder with a dry paper towel. This time you can install it. This method is especially useful for button failures.