Ricoh D131 Service Manual page 542

SC824 D Self-diagnostics error: NVRAM (resident)
NVRAM verify error
No NVRAM installed or NVRAM is damaged.

No NVRAM device
[1401]

Damaged NVRAM device

NVRAM backup battery exhausted

NVRAM socket damaged

Replace the NVRAM
Self-diagnostic Error: Optional RAM
SC829 D
The optional RAM returned an error during the self-diagnostic test.

Replace the optional memory board

Controller board defective

For more details about SC 833, SC834 and other errors, execute SP5990 to print an
SMC report so you can read the error code. The error code is not displayed on the
operation panel. The additional error codes (0F30, 0F31, etc. are listed in the SMC
report.
SC833 D Self-diagnostic error: Engine I/F ASIC
ASIC (Mandolin) for engine control could not be detected. After the PCI
was configured, the device ID for the ASIC could not be checked.

[0F30] Defective ASIC (Mandolin) for system control

Defective North Bridge and AGPI/F

Replace the motherboard (engine I/F board).
SM Appendix 2-75
SC800: Overall System
GW
GW
D131/D132/D133