Printer drops wireless connection after some time

Question

Have HP Laserjet P1102w printer. (Serial# edited Serial Number by Moderator) (Firmware 20130703)
Windows 7(64bit)
Printer on wireless home network.
For a period of time the printer prints wirelessly and prints from EPRINT EMail address OK.
Normally Wakes itself when print received.
After some period of time,however,the printer quits responding.
It did not wake when print received.Normally wakes itself when print received.
I manually turn it back on (front panel power button) and observe the following:
The blue wireless light is on.
The blue error light is on indicating no error.
the green light also is on.
Open Control Panel(View devices and printers) on computer and it shows printer error.
Can restore normal operation by unplugging for a few seconds and turning back on.
Can also restore normal operation by turning off and back on.
Will quit responding again after some period of time when trying to print.
Tried Windows troubleshooting and HP "Print and Scan Doctor".Tells me to reboot.
How can I fix this problem?
Can't reboot by unplugging or powering off  when away from home so can't use ePrint email address to print.
Can't print when away from printer when it quits responding.
Thanks for any help.
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Answer 1

These settings are for setting up your wireless printer to stay connected to your router, keep wireless devices better connected and makes your router secure and hack proof.
1. Set a static IP in the printer (click here) outside the DHCP range of the router (check your manual).
   This is for Linksys routers but can be used for all routers. Verify your DHCP range and change this
   first if needed. More Wireless Printing help is here.
2. Verify in the printer that 'Auto Off' is disabled.  Use the Embedded Web Server (EWS) by going to the
   printers IP address in your browsers address bar, click Settings Tab/Auto Off. Or use the Printer
   Assistant, Printer Home Page (EWS).
3. If the printer supports and has IPv6 enabled, turn off IPv6 in the printer.
4. Assign the printer a static IP address, try using 8.8.8.8 for the Manual DNS server and 8.8.4.4 for the
   Alternate preferred DNS server.
In the router: (Refer to your router manual for information)
5. Use a fixed wireless channel like 1, 6 or 11, never 'auto', try channel 1 first then the rest. 
6. Set router to 20Mhz only, or 145Mbps depending on router. 
7. Always use WPA2-AES (Personal) encryption, but you can try ‘mixed’ mode. 
8. Disable WPS and never use it and disable UPnP for the routers security. Nobody can hack your
   system now and helps with wireless connectivity (if you want to know why, search the web).
9. If you have a dual band router (2.4Ghz and 5.0Ghz bands), make sure the SSID’s are NOT the same,
   they must be different for all bands, even for any Guest networks.
10. SSID broadcast must be enabled.
11. Save all settings. Power off both, wait 2 mins.  Power on router wait 2 mins. 
12. Power on printer and verify it reconnects to router. 
Windows 7/8/8.1   Is Network Discovery on or off?
Control Panel/Network and Internet/Network and Sharing Center/Advanced sharing settings.
Under Home or Work (current profile) / Network Discovery.
Select "Turn on network discovery" and save changes.
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