A GCM / LCM stops working and displays the error message "Insufficient System RAM". It no longer responds to information requests via the front panel keyboard/display nor via XPSI software connected on either of the available serial ports.
A power cycle restores functionality but only for a limited amount of time (ie: hours or days).
Free system ram drops below minimum requirements:
Any GCM with sys ram below 18k
Any LCM with sys ram below 10k
The amount of free system ram must be kept above minimum requirements.
Use Tech Bulletin 95-33 for troubleshooting the GCM / LCM. It is a comprehensive guide providing both hardware and software suggestions that will increase free system ram.