Hp laserjet 3050 - old printer can it be wireless

SOURCE: low memory display on HP Laser Jet 3050

Hello All,

Please perform the following:
Super NVRAM init
When a super NVRAM init is performed, the all-in-one language and telecom country/region settings
are undefined. The user is prompted to set the language and telecom country/region. Until these settings
are defined, the all-in-one will not return to the Ready state.
CAUTION A Super NVRAM init erases all data that is stored in both the unprotected and
protected NVRAM memory.
To perform a super NVRAM init
1. Turn off the all-in-one.
2. Press and hold down the * and 5 buttons.
3. Continue to hold down the buttons while you turn on the all-in-one. Hold the buttons throughout
the entire power-on sequence.
4. When Permanent Storage Init. appears on the control-panel display, release the buttons.
5. When prompted, set the language and telecom country/region.
6. Allow the all-in-one to return to Ready before using it.

SOURCE: hp laserjet 3050 - black line down the center of

If the lines only appear on copies from the auto feeder and printing is clean, then lift the auto feeder section and clean the scanner glass underneath.
If printing and copying have similar 'streaky' results you probably have a bad toner cartridge - try a replacement. If that doesn't work you have a fuser problem - which is quite a costly repair based on the replacement cost of your unit

SOURCE: HP 3050 - vertical black lines

You say that the scanner glass is clean, but it takes next to nothing to cause these lines. Couldn't hurt to chack again (if you havent cleaned it 6 times already).....anyway, I found this document that is not specifically for your machine, but the menu commands should be the same:
Recalibrate the product scanner:

1. Press ENTER/MENU on the control panel of the product.
2. Press the < arrow key once to display Service and press the ENTER/MENU button.
3. Use the < and > keys to select Scan Correction and press the ENTER/MENU button.
4. Insert a blank, bright white piece of letter (8.5 x 11 inches or 216 x 279 mm) or A4 (8.3 x 11.7 inches or 210 x 297 mm) paper into the document feeder tray.

SOURCE: HP Laserjet 3050 All in one printer - Unable to receive faxes?

Vonage is dgital. fax machines are analog

SOURCE: my printer is HP LASERJET P1007 Print commond

please your printer switch is doing off.
and your print job is cancle to aply
and new command print and select to page and aply print.