Posts: 883
Threads: 17
Joined: Feb 2006
The heads (mushrooms) of the heat stakes have failed. If the unit is in great condition, the problem was a manufacturing issue and you're likely to find with just a light touch on the other mushroom heads that they'll just pop right off. I've seen units where every heat stake had failed except for the bottom. If the unit has been well used, the popped heads are due to stress failures.
The generally accepted repair method is to hold the board tightly in place and place a very small amount of super glue on the post. Follow that with drop or two of instant cure and move to the next post. You can also use rubberized super glues, they're flexible, black and work well in this application.
I cannot over emphasize the *small amount* disclaimer above. Too much and you'll glue the key hinge, seizing the key and turning your great find into a paperweight.
Posts: 26
Threads: 10
Joined: Jan 2007
Two heat stakes fixed with super glue and I have a new HP-15C! Thanks FixThatCalc