printer loses wireless connection when in sleep mode

[DH915]

after att updated my wireless modem, it was very difficult to connect wireless , after many attemps i finally got it connected but the next time i tryed, i got a no connection error on my PC. i was able to finally figure out what the issue was when the printer screen is not displayed, like it is in a power saving mode, the printer loses connection with the wireless modem, the only way i can get it to connect is power down the printer and as it starts up i press the button on my NetGear 7550 wireless modem and it will reconnect-- ??? anyone know why, my older  unit never done any of this--

[sabretooth04]

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.

While DHCP is convenient, devices such as printers should always be assigned a static (fixed) IP address manually to avoid conflicts on your wireless network.

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 (Windows solution 4, static IP).
2. Verify in the printer that 'Auto Off/Sleep' is disabled and/or the System Mode Time Out is set to zero (0). 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). Also check your Printers Properties.
3. If the printer supports and has IPv6 enabled, turn off IPv6 in the printer.
4. If needed and you assigned a static IP address, try using 8.8.8.8 for the Preferred DNS server and 8.8.4.4 as the Alternate DNS server. 
5. Wireless printers only work on the 2.4Ghz band.
6. Verify the printer is on the latest firmware by checking with the HP Support site.
7. Check all wireless devices in your home for interference. Check microwaves, baby monitors, wireless phones and wireless alarm systems are a big culprit. Any of these will knock out your wireless printer intermittently.

In the router: (Refer to your router manual for information) 

1. Use a fixed wireless channel like 1, 6 or 11, never 'auto', try channel 1 first then the rest. 
2. Set router to 20Mhz only, or 145Mbps depending on router. 
3. Always use WPA2-AES (Personal) encryption, but you can try ‘mixed’ mode. 
4. 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).
5. 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.
6. SSID broadcast must be enabled.
7. Save all settings. Power off both, wait 2 mins.  Power on router wait 2 mins. 
8. Power on printer and verify it reconnects to router. 

Windows 7/8/8.1   Is Network Discovery on or off?

1. Control Panel/Network and Internet/Network and Sharing Center/Advanced sharing settings.
2. Under Home or Work (current profile) / Network Discovery.
3. Select "Turn on network discovery" and save changes.

Last ditch effort - If your printer has an Ethernet connection, suggest you get some Power Line Adapters and convert your house wiring to Ethernet for your printer.

[DH915]

why did my older wireless modem work so good?

[sabretooth04]

Because all routers are not the same.

[MichaelJ]

I know this is off topic, but your handle "honor student" doesn't quite coincide with your spelling and grammer.