While it sounds like the RAM, I have found that if a BZ has been sitting for a while normal maintenance is to:
- Unplug and reseat all cables
- Press down all socketed chips.
- Unplug and reseat all power supply cables.
These beasties are really sensitive to any corrosion or oxidation on the chips and cables. Periodically reseating them will reduce about 90% of the percieved "fragility" issues people have attributed to Battlezones over the years. Until I sold it last year, I had my Battlezone since 1983 and that was about all the maintenance (along with cleaning the mirror and the top of the monitor to get the dust off) that it ever needed.
ken