Lexmark CX/CS8xx_72x and XC/Cxxxx: Entering Sleep Mode Fails and Exiting Sleep Mode is Sluggish or Hesitates

Single-Function: CS720, CS725, CS727, CS728, C4150, CS820, CS827 and C6160

Multifunction: CX725, CX727, XC4140, XC4143, XC4150, XC4153, CX820, CX825, CX827, CX860, XC6152, XC6153, XC8155, XC8160 and XC8163

Failure to enter sleep mode is accompanied by the message, "CANNOT ENTER SLEEP MODE: The devcie is busy and cannot enter Sleep Mode." Also, a secondary symptom exhibiting a delay may be seen when exiting Sleep Mode.

1. Reboot the device or awaken it to return to a Ready state.



2. Check your printer's firmware level.

   xref_Check_xref

   for general instructions.

   xref_Check_xref



3. Based on your device's existing firmware-code level, you can update to the firmware levels suggested below:

   • PP.031.088 or earlier

     • Update to PP.033.098 or later. (FW3.3.98)

   • PP.31.089 or later, which indicates FW3.3 may not have all implemented fixes.

     • PE-firmware release xx.033.117 or later.

4. Update firmware.

   Badge Reader Does Not Work when Printer Is in Standby and Sleep Mode

   for general update instructions.

Have the following available when calling Lexmark Technical Support;

• Printer model(s)

• Printer serial number

LEGACY ID: SO8315