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https://blogfreely.net/spyprose8/the-most-inspirational-sources-of-fob-key-repair
How to Fix a Key Fob That isnt Working If your key fob wont work and youre not sure why you can fix it with some simple steps The first step is to be sure that its not the backup remote If your backup remote cannot lock and unlock the doors of your car it is likely that the primary remote isnt working Most car remote key failures are caused by circuitry or battery issues Battery It is not unusual for the battery inside a car key fob to get worn out It is simple to replace batteries However it is important that you use the correct type You can refer to the owners manual or contact the manufacturer to determine the right kind It is also crucial to examine the battery compartment as dead batteries can leak caustic chemicals which can damage the remote If replacing the battery does not fix the problem there may be other issues requiring professional attention If buttons are stuck or broken for example it could be necessary to disassemble the remote and rework each component It is also possible to reprogramme the vehicle to recognize the new device Buttons From repeated use key fobs could become worn and dirty This is not uncommon however it can cause buttons to cease functioning or require a difficult press to get them to function This can be very frustrating especially when youre away from your home and need to start your car Even wornout or malfunctioning buttons are often fixable with a little effort and materials you already have at home First make sure the batteries are properly charged and that the indentation on the back of the button is filled Then carefully open up the remote and inspect the circuit board Look for signs of corrosion or other signs that the buttons are worn or damaged such as missing paint that is conductive Use a Qtip dipped in rubbing alcohol to gently clean any membrane contact that has damaged or has conductive paint missing Avoid rubbing too hard because this could damage the conductive paint and block the button from firing when it is pressed Check the battery connectors terminals for loose solder connections Soldering them back in place can restore the buttons functionality If this is the situation The same procedure can be used to restore function to any other loose connections within the fob In the end if any of the rubber buttons on the front of the key fob arent working or require a very hard press to work it is likely that the graphite disks that are on the back of the button are wearing out and require replacement mobile key repair is usually done by rubbing a pencil over the disks This will bring the button back to life If none of these solutions work or if you still 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 the issue by cleaning and resoldering your fob but you should have another spare in case it doesnt work Circuitry Whether or not the keys fob buttons are functioning the circuit board inside your remote may be dirty A thorough examination is usually enough to fix this issue The most common causes of dirty circuit boards are water and damaged cases A damaged case can allow water and other debris to pass through and short out the electronics Water can also eat away at pins and small connectors on the board which are known as vias If youre skilled enough to open your key fob and dont mind making some mess we can take the buttons out of their sockets and then solder new ones Also its worth checking the connections between the battery terminals They can get very filthy and if theyre not tight enough the buttons might not work or even stay in their down position Soldering the terminals and putting the button back in place is usually all thats needed to return the key fob that is not working to working condition NonRemote transponder chips The nonremote chips that are sealed are more durable than remote fobs however they can be cracked in the event of a hole being drilled into them or if a car door handle or lawnmowers is pushed over them The majority of nonremote transponder chip failures could be attributed to blowing fuses If youre not comfortable opening the key fob you may remove the circuitboard and utilize a multimeter to check that the diode is operating properly If youre not comfortable doing this go to your local hardware store or Oreillys and theyll usually have a radio frequency tester that can let you know whether the key fob is sending a signal Programming Key fobs are subject to a lot of abuse and arent indestructible They can lose their pairing with the receiver in your vehicle because of shocks or a lowbattery which requires the reprogramming A professional auto locksmith or a main dealer will be able to reprogram your key fob and get it back up and running If in the unlikely event that resetting and repairing your key fob fails it may be time to replace it all over again
