Use silicone lubricant.
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So today, i opened up the machine and fiddled around for an hour
or two.
1 opened up the back [not necessary]
2 opened up control panel. took off the side screws
3 disconnected control wires, and speaker connector
4 took off an opened up the trackball
5 took off both rollers, TAKE CARE AS THE SMALL BOLT AT THE END COMES OFF.
i then lubricated both, and put them back.
(after fiddling around, switching them around etc).
6 TAKE CARE IN REASSAMBLING EVERYTHING. Made the rookie mistake of putting
everthing back together again, only to find out trackball only went up and down.
then had repeat all the steps to remove all the screws again.
7 re-adjusted the trackball rollers, and tried everything out, by plugging in machine
and testing it. Then put control panel back on, and tested again, finally put it all
back together and tested one more time.
8 Centipede and Millipede are now 'playable', but due to the default settings,
missile command is not sensitive enough, and neither is liberator.
so i can sort of play half the games, ughh.
later
-1