A Provocative Remark About Remote Key Repair

How to Fix a Key Fob That isn't Working
If your key fob won't work and you're not sure why, you can fix it with some simple steps. The first step is to be sure that it's not your backup remote.
If your backup remote can unlock and lock the doors of your car, it is likely that the main remote isn't functioning. Most problems with car remote keys result from battery or circuitry problems.
Battery
It is not unusual to find a battery on a car key fob to wear out. It is easy to replace batteries. However, it is important to select the right type. You can refer to your owner's guide or contact the manufacturer to inquire about the right kind. It is also a good idea to examine the battery compartment with care since dead batteries may leak caustic chemicals that can harm the remote. If replacing the batteries doesn't solve the problem it could be because there are other issues that require professional attention. If the buttons are broken or stuck for instance it could be necessary to take the remote apart and rework each component. You can also try reprogramming your vehicle to recognize the new key fob.
Buttons
Key fobs may become filthy and worn out due to frequent use. This is not uncommon however it can cause buttons to stop functioning or require a difficult press to get them to function. This can be frustrating, especially when you are away from your home and have to start your car. Even malfunctioning or worn-out buttons are often fixable with a little effort and tools you already have at home.
First, make sure the batteries are charged correctly and that the indentation on the back of the button is filled. Then, carefully open the remote and inspect the circuit board. Examine for signs of rust or other signs that buttons are worn out or damaged, like missing paint that is conductive. Use a Q-tip dipped in alcohol to gently clean any membrane contacts that have worn or have conductive paint missing. Do not rub too vigorously, as this could erode the conductive paint and prevent the button from firing when it is pressed.
Check the battery connector's terminals for loose solder connections. If this is the case, simply soldering them back in place could restore functionality to the button. You can follow the same method to restore functionality to any other loose connection within the fob.
If any of the rubber buttons on the front of the keyfob isn't working or require being pressing very hard, the graphite disks at the back of the button may have worn out and require replacement. It is usually done by rubbing a pencil over the disks. This should bring the button back to life.
If none of these solutions work or you are unable to get the button to respond when you press it hard, it is possible that the circuitry has failed. It is possible to fix this by cleaning and re-soldering your fob however, you should have an extra in case it doesn't work.
Circuitry
Whether or not the keys fob buttons are functioning, the circuit board inside the remote could be dirty. A thorough inspection is often enough to resolve this issue. The most frequent causes of dirty circuit boards are water and damaged cases. A damaged case allows water and other debris to enter and short circuit the electronics. Water can also get through pins and vias, which are the tiny connectors on the board.
If you're skilled enough to open your key fob, and aren't afraid of making a mess, we can take the buttons out of their sockets and then solder new ones. Also, it's worth checking the connections between battery terminals. They can become very filthy and if they're not tight enough, the buttons may not work or even stick in their down position. Soldering the terminals and buttons back in place is usually all it takes to restore a non-working key fob to functioning condition.
Non-Remote transponder chips
The non-remote chips sealed in a sealed case are more durable than remote fobs, however they are susceptible to breaking in the event of a hole being drilled into them or when a door handle for a car or lawnmower runs over them. Most of the time non-remote transponder chip malfunctions could be attributed to blowing fuses.
If you're able to open up a sealed non-remote key fob and can tolerate the mess, you can take off the circuit board and test the fuse with a multimeter for proper diode function. If you're not comfortable with this, visit your local Oreilly or hardware store and test their RF frequency tester. This will inform you whether the key fob is sending an RF signal.
Programming
Key fobs are not indestructible and can be damaged through a variety of causes. They may lose their connection to the receiver in your car due to shock or low battery, requiring the reprogramming. her explanation or main dealer can reprogram your key fob to get it back up and running. If resetting or repairing your keyfob does not work, you may need to replace it.