Fanuc alarm 941: MEMORY PCB CONNECTION ERROR
system alarm · Fanuc 0i-D
What it means
The control could not establish reliable connection to the memory PC board at power-up - the board is not connected securely to its backplane/connectors. This prevents reading of SRAM contents and halts the start-up sequence.
Likely causes
- Memory board unseated or only partially inserted
- Contaminated or corroded board-to-backplane connectors
- Damaged connector pins after prior board work
Triage note: Reseat the memory board with power off before ordering parts; this clears the majority of field cases.
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
- Request a quote →
Memory PCB / backplane per control model
backplane · Check if others ruled out
Need the part urgently?
Send us alarm 941 with your machine details — typical RFQ turnaround is 24–48h.