Lexmark CX725
960.xx
RAM memory error: RAM soldered on the board is bad.
See Controller board removal.
961.xx
RAM memory error: slot 1 RAM is bad.
See Memory failure service check.
964.xx
Download emulation cyclic redundancy check (CRC) failure has occurred. A checksum failure detected in the emulation header or emulation file.
See Download emulation cyclic redundancy service check.
This article shows the primary information required to escalate error codes or messages issues.
Lexmark CX/CS8xx and XC/Cxxxx: 843.01 Error Message