Ricoh D093 - IEEE1394 I;F Error; Verify Error at NAND-Flash Update; Wireless LAN Error 1;2

Service Call Tables
SM 7-35 D093/D094
Trouble-
Shooting
842 C Verify error at NAND-Flash update
CTL
A verify error occurred while writing to NAND-Flash when the ROM was
being updated locally or remotely.
 Do the procedure again.
 If not successful after two attempts, the machine will issue SC819
851 B IEEE1394 I/F error
CTL
There is an incorrect setting in the driver that prevented correct operation of
the interface.
 Check and correct the driver settings
 Network (PHY) LINK module defective
 PCI interface defective
 IEEE1394 I/F board defective
 Controller board defective
853 B Wireless LAN Error 1
CTL
During machine start-up, the machine can access the board that holds the
wireless LAN, but not to the wireless LAN card.
 Wireless LAN card missing (was removed)
 Wireless LAN connection loose.
854 B Wireless LAN Error 2
CTL
During machine operation, the machine can get access to the board that
holds the wireless LAN, but not to the wireless LAN card (802.11b or
Bluetooth).
 Wireless LAN card missing (was removed)
 Wireless LAN connection loose.