#5658 NORM Ship.2: Sticky Alt or Control Key

[Zarro Boogs per Child]

#5658: Sticky Alt or Control Key
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  Reporter:  davidpfarrell  |       Owner:  wad      
      Type:  defect         |      Status:  new      
  Priority:  normal         |   Milestone:  Ship.2   
 Component:  hardware       |     Version:  Build 650
Resolution:                 |    Keywords:           
  Verified:  0              |    Blocking:           
 Blockedby:                 |  
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Comment(by briandorsey):

 I decided to do some experimentation yesterday to see if I could confirm
 or deny the condensation theory. I put my XO in our food dehydrator at
 about 100 degrees F for about 5 hours. Using the OFW diag to test for a
 sticky ALT key, I checked on it at around 2 hours, and it seemed to be
 happening less. After 5 hours, all my keyboard issues went away. I used
 the machine fairly consistently for another 5 hours or so that evening
 with no trouble then shutdown. After booting in the morning, my ALT
 troubles returned. So... I don't think this really confirms or denys the
 condensation theory, but it perhaps hints at it?

 A few things I noticed in the OFW tests which might be useful: When my
 keyboard is malfuntioning, I can usually get ALT to stick by pressing it,
 or other nearby keys (such as z or x). Also, the ALT key becomes
 incredibly sensitive. Barely brushing the surface of the key will rapidly
 trigger key presses.

 After ALT started acting up again, disassembled the base just enough to
 unplug the keyboard ribon cable from the controller. After doing that, the
 external keyboard works perfectly, whereas I was having trouble with the
 external keyboard previously as well. It seems very likely that my
 troubles are with the internal keyboard itself.

 Thanks everyone for all the time spent looking into this.

-- 
Ticket URL: <http://dev.laptop.org/ticket/5658#comment:40>
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