Memory SIMM Problems

-----------------------------------------------------------------------------

  SIMM sockets may develop solder fractures or internal breaks that will
  cause problems, either when the machine warms up or when it tries to boot.
  Resoldering may help, or it may require replacement of the socket.

  The plastic-tabbed SIMM sockets used in the A4000 are fragile, and if the
  tab breaks off, you'll need to either replace the socket or come up with
  some other mechanical method to hold the SIMM firmly into the socket.