I have to restart modem in order to print with 8600

[bg34]

Everytime I want to print wirelessly I have to restart the modem and then it prints fine. If I don't restart the modem after my laptop has been in sleep mode I get the 'printer is not responding' message.

[Drakster]

Hi @bg34,

Thanks for reaching out to the HP Support Forums!

I see that you're experiencing wireless difficulties with your printer again.  I would be happy to help you and please remember to return to this thread and mark 'Accept as Solution', if I have successfully helped you resolve the issue. If you wish to say 'thanks' for my effort to help, click the 'thumbs up' to give me a Kudos.

I recommend that you try the steps within this guide again: 

• 'Printer Offline' or 'Printer Not Responding' Message (OS X)

It is likely that another device on your network is trying to use the same IP address as the printer or there is interference causing the problem. 

TIPS:

• Check to see if the router has the latest firmware.
• Which encryption type are you using?  I recommend using WPA2.
• Do you have a dual band router broadcasting (2.4 GHz and 5.0 GHz)? The printer can only connect to the 2.4 GHz network.
• Make sure the network names (SSID) are not the same, they must be different (unique) for each band. 
• Try a different wireless channel.
• How far away is the printer from the router? 
• Disable Bluetooth on the the Mac as it can interfere with the wireless signal.
• Restore the router to factory settings and reconfigure it.

There are many things that can cause interference. For example, other wireless devices, walls, distance, appliances, water pipes and anything metal can weaken the wireless signal strength.

It is a good idea to assign the printer a static IP address, outside your DHCP range. For example, some routers DHCP default range is 192.168.0.100 to 192.168.0.200. So, I would use 192.168.0.232. 

To assign the static IP address, use these steps as a guideline.

• Print a Network Configuration Page from the printer's front panel menu. Note the printer's IPV4 IP address.
• Type the IP address into your internet browser to bring up the EWS.
• Choose the Networking tab, then Wireless on the left side, then select the IPv4 tab.
• Select Manual IP. 
• Enter your manual IP address of (192.168.0.232)
• Enter  255.255.255.0 for the subnet mask, unless it is different.
• Enter your router's IP address which can be found on the Network Configuration Page) for the default gateway.
• Please click Manual DNS Server. For the Manual Preferred DNS Server please enter 8.8.8.8 and for the Manual Alternate DNS Server please enter 8.8.4.4.
• Click Apply.
• Reboot the router, printer, and computer.
• Test printing. 

I hope this information is helpful. Please respond to this post with the results. Good Luck!