• Code: E744-0003
• Description: Language file/boot ROM/USB memory error
  Language file version error
• Causes: The language file version does not match Bootable.
• Remedy: Download a language file of the correct version.

• Code: E744-0004
• Description: Language file/boot ROM/USB memory error
  Language file read error
• Causes: Reading of language file is invalid.
• Remedy: Download a language file of the correct version.

• Code: E804-0000
• Description: Error in power supply fan
  The fan lock detection signal is input for about 10 sec or longer continuously.
• Causes: Power supply fault, DC controller PCB fault.
• Remedy: - Replace the power supply fan - Replace the DC controller PCB

• Code: E805-0005
• Description: Error in duplexing fan/CPU fan
  The duplexing fan lock detection signal is input for about 10 sec or longer continuously.
• Causes: Duplexing fan fault, DC controller PCB fault.
• Remedy: - Replace the duplexing fan - Replace the DC controller PCB

• Code: E840-0000
• Description: Error in pressure release mechanism
  Although passing 2.5 sec from the start of HP control, HP (pressure condition) cannot be controlled.
• Causes: Fixing drive assembly fault, fixing pressure release cam fault.
• Remedy: - Replace the fixing drive assembly - Replace the fixing pressure release cam