The circuit board below beneath is a completely different story, you'll probably need to do some cleaning here using some contact cleaner and a cloth. Another problem that occurs often is that the pod has worn a hole through the PCB track. If this has happened, then placing the pod with a slightly different orientation should solve the problem. Don't try to fix the hole with solder, because you'll raise the height of the track and the button won't work properly at all afterwards. When everything has been cleaned, use some new tape to hold each pod in it's correct position. The pods have 3 contact points and three straight sides. Make sure none of the contact points is are touching the track of the centre contact. When assembled correctly, one of the straight sides should bridge the track coming from the centre contact. You can test each pod with your finger before assembling the housing again.
Inside there's a slightly more complicated micro-switch, with a two armed actuator. Be careful, because all these small parts can easily fall out and aren't that easy to get back in (assuming you've found them again on that patterned carpet where they landed). The only important bit is the two contacts on the right left hand side. Clean these with contact cleaner and re-assemble the switch.
Bryce.
[[Category:Hardware]] [[Category:PeripheralsInput Device]] [[Category:DIY]]