Jupiter 4 corrosion

[Chris MacDonald]

My Jupiter 4 had been sitting in the corner for more than a year and
this weekend I finally had a chance to set it up on a stand. 
Unfortunately when I turned it on, no sound!  After poking around the
insides, I discovered that most chips on the motherboard were not
getting +15V.  The power supply was fine, and the power connector to the
motherboard had +15V.  

I removed the motherboard to examine it and discovered that there was a
localized area of corrosion on some traces around the connector to the
NiCad battery.  :(  The battery is mounted away from the board and is
connected to it by a set of wires that are several inches long.  I guess
corrosive effects can be transmitted through wire, so off-board mounting
is no guarantee.  The battery itself had telltale corrosion and "salt"
crusted around one end.

I removed the battery and was able to run jumper wires to bypass the bad
traces but I wish I had caught it sooner.

-Chris