Hi,
I have a similar model did the following steps to resolve the issue.
1. Turn on the HP PSC 1500 series product.
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.