Sleep mode laserjet 1025 - HEWLETT-PACKARD CP1025nw Laser Printer

http://h30434.www3.hp.com/t5/Other-Printing-Questions/Sleep-mode-p3015-printer/td-p/2353489

If the ground spring located on the left inside wall of the printer is ok, and you have tried cleaning all the ground contacts on the cartridge, then it may just be a bad toner cartridge. Especially if it's a third party cartridge and/or especially if this problem happened right after or shortly after installing a new cartridge.

Disable sleep mode or update firmware. Cause this is a firmware bug.

Hi Brian,

The printer goes to sleep mode irrespective of what cartridge you have in the printer. Printer goes to sleep mode if the printer is not in use.

Regards,
Sean

Disable or enable sleep mode

1. Press the Menu button .
2. Open each of the following menus. Press the down arrow to highlight it and then press the OK button to select it.
   
   1. CONFIGURE DEVICE
   2. RESETS
   3. SLEEP MODE
3. Press the up arrow or down arrow / to select the ON or OFF setting, and then press the OK button.
4. Press the Menu button .

In most cases the formatter board is causing this problem. The only way to solve it is replacing the formatter board

If it comes out of "sleep mode" every 10 minutes, and you haven't touched the printer or sent any data to the printer, try unplugging the LAN cable for 15 minutes. If the printer stays in "sleep mode"either the formatter is bad or whatever is on the other end of the LAN cable could be bad. If you can put the printer on another PC to see what happens, that would really help you out.

You may need to have your printer's firmware updated by a certified technician.

Under the "RESETS" menu there is an option to "turn off" Sleep Mode.

Hello

Please note: Instructions only applicable to the network printer which supports telnet protocol.
HP Mono and Color LaserJet Network Printers - Sleep Mode Problem
Issue
Network printers may not print when a job is sent to the printer while in sleep mode.
Solution
Please follow the steps below-
1. Connect the printer to telnet- Using command prompt.
2. Type telnet > IP address press then enter.
3. Type menu and press enter.
Following screen will appear-

4. Choose option 2 TCP/IP menu and press enter,
5. Choose option 5 TCP/IP other settings and press enter.
6. Type y in front of cursor and carry on pressing enter until you reach “SLP keep alive”. By default this value may be 0.
7. Change this value to 1.
8. Exit and save settings.

- Nikhil