According to the R-30iB Controller Maintenance Manual, 3.7 Troubleshooting Based on LED Indication, the CPU card and/or Main Board are to be replaced.
Both boards sent overnight to FANUC Service (ten months left warranty); after a week of testing they say both boards are functional.
Any qualified ideas as what else can be wrong with the R-30iB controller experiencing the symptoms described within the Subject of this message?
Anticipated Thank You for whomever could enlighten us about this matter.