A test page keeps on printing everytime the printer is switch on

Align the cartridges
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Follow the steps which are given in the below, in the order presented, to correctly complete a print cartridge alignment.
1. Turn on the HP all-in-one.
2. Disconnect the USB cable from the all-in-one.
3. Press the sequence of front panel buttons below to initiate the print cartridge alignment process. The button-press sequence must be completed within ten seconds. It might take several tries to complete the sequence within ten seconds.
a. Press and hold Cancel.
b. While holding Cancel, press On.
c. When the Check Paper and Check Print Cartridge lights begin to blink simultaneously, release both buttons.
d. Press Cancel again.
e. Press Copies.
f. Press Paper Type.
g. Press Color Start Copy.
h. The alignment page will begin printing. If the alignment page does not print, repeat the button-press sequence in this step.
4. Once the alignment page is printed, place the page face down on the scanner glass and press Scan. The alignment is complete when the On light stops blinking. 5. Reconnect the USB cable.

Now, after performing all the instructions check the functionality.
Charles, if the issue persits then as an alternative I suggest you to please go through the given below Web site and perform the steps accordingly to resolve the issue.
For additional information, I recommend you to please visit the below Web site and perform the given instructions in order to resolve the issue.
http://h10025.www1.hp.com/ewfrf/wc/document?lc=en&cc=us&docname=c00473778
NOTE: Clicking the link may give an error indicating it is
invalid. If this occurs, copy the portion of the address
on the remaining line(s) and paste it at the end of the
address showing in your browser until the complete address
is displayed in the Address box.
Charles, if the issue persists then follow the steps given below.
Step 1 : Power cycle the unit
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Follow the steps below to power cycle your all-in-one:
1. Shutdown your computer.
2. Verify that the unit is switched on. Unplug the all-in-one from power and disconnect the connection port.
3. Wait 30 seconds.
4. Plug in the power only.
5. Repeat steps 2-4 two more times.
6. On the third time after plugging the unit into power, reconnect the connection port from the all-in-one to your computer.
7. Restart your computer and check the functionality.

Step 2 : Semi-full reset
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To perform a semi-full reset on your HP PSC 1400 series All-in-One,
follow these steps:
Note:
A semi-full reset will do the following:
The user settings to the factory defaults, Language and country settings on some models
Reset the All-in-One to the factory default settings by using these instructions:
Reset the All-in-One to the factory default settings by using these instructions:
1. Disconnect and then reconnect the power cord.
2. When the lights begin to flash, press and hold On/Resume and Number of Copies.
When only the On/Resume light is flashing, release the buttons.
When the On/Resume light is steady, the reset is complete.
Now, check the functionality. This shouls resolve the issue.

Hi,

The printer is printing alignment page. This will be printed if the printer was reset or if you have changed the ink cartridges. We need to complete the alignment process.

1. Place the printed page on the scanner correctly.
2. Press scan button on the printer.
3. The ON light will start blinking, wait until the ON/OFF light stops blinking.
4. Now the alignment is completed and it should not print anymore untill next cartridge change

Thank you
Rizwan.