Ok dear fellow members, yesterday I forgot my key in my pants and guess what.... yes yes yes, I run them in the washer and found it 2 hours later when I was putting all the washed clothes into the dryer
. I officially WASHED my keys =)))
So, here I am with another DIY thread in this forum
But Don't Panic if it just happened to you! First
, IMMEDIATELY take batteries out (DON'T try to PRESS any button while the batteries inside otherwise you'll get a short circuit and it Will be damaged!)
You can't imagine how badly oxidized my electronic board was! I thought I just lost a $300 key! But it can be fixed!
I found this thread on Crossfire forum on how to take apart your key case and decided to make my own pictures and help SLK Members out since I had a different situation =) ! The original thread is here:
How to take apart a key fob without destroying it! - CrossfireForum.org
So, tools you'll need:
1) 50-70% Isopropyl Alcohol (available in any CVS, Wallgreens, Walmart, etc. or your wife's medicine closet (:
2) Lots of Q-tips.
3) Small flat container where you can dip your electronic board.
4) Flat pliers or something that will help pry open the key case itself.
5) Really flat small knife or flat head screwdriver.
First, we need to open our case, right? It's held by the epoxy glue and two bumps that set into place when it's closed.
Take your pliers (that was the most handy tool I had at the moment) and insert them into the small gap that appears when you extend the key. Then gently push into the direction of arrows to open the front half of the fob. As you are prying open the front half of the fob, be careful not to allow the spring loaded key to pop out. (As the crossfire member noted: "Take care not to let the spring fly off by mistake. It's so small, you'll never find it again!")
As I was prying off I was moving towards the end an gently pushing it apart.
Now when it's opened, take the electronic board out. NOTE: make sure to be careful with battery terminals. DO NOT break them!
You can push it with your finger where you placed the battery and it will come out.
Next we need to take the white plastic cover that secures the transponder and is held by the epoxy glue (it is glued to the transponder itself).
I put couple drops of isopropyl alcohol with a Q-tip on the plastic cover and let it soak for a minute or so.
Then insert a small knife between the transponder and this white plastic holder and pop it. BE CAREFUL!!! DO NOT put pressure on the transponder so you DON'T Damage it!
Then, another important part. Removing the transponder. Again, i applied a few drops of isopropyl alcohol on the area where the transponder is glued and let it soak for a few minutes.
Put the same small knife underneath it and pry it off GENTLY! DO NOT DAMAGE IT!
Note the direction of the transponder when you take it out.
Now it is safely removed and we can continue:
Here are pictures of my badly oxidized contacts on electronic board. Ugly, isn't it?!
Now we need to remove all that oxidation, right?! Take your plastic container, pour generous amount of isopropyl alcohol in it and put your electronic board in so it's fully covered! Let it stay there for about 5-10 minutes.
Don't worry, nothing will be damaged. Water might be inside or underneath electronic chips and we need to get rid of it! While the electronic board will be in our alcohol solution take Q-tip and start gently rubbing it, focusing on all the contacts! After it's been soaked for 10 minutes, remove it and use Q-tips again. Dip Q-tip in alcohol and continue gently rubbing off the electronic board focusing on the oxidized areas. Don't worry if some numbers and letters will disappear =) (Also I masked mine on a picture for security reasons).
After you cleaned them let them dry out for about 30 minutes or so (just to make sure)
This method was shown to me by my friend. He repairs laptops. He says when a customer brings his laptop and says: "I spilled some coffee on it", hahahaha... it's time for some rubbing alcohol!
So, we're safe here!
Now, the most pleasant part. My cleaned contacts:
Wait, did I tell you to also clean the rest of the parts with alcohol to remove all the rust and dirt?! =))
Getting ready to re-assemble everything back together.
Since I can't put more than 10 pictures in the same post, I'll make a second post in a few minutes.