When my Canon MP530 prints color, instead of solid color, i get horizontal color bars

check the status of the black ink cartridge it might be empty or the nozzles are colted and its jam. Try replacing the cartridge.

CHECK INK
A.
U130

An ink tank that was once empty is installed.
Replace the ink tank.
Printing under the situation may damage the Print Head.
Canon shall not be liable for any machine malfunction or damage caused
by refilled ink tanks.
If you want to continue printing with the refilled ink tank installed, press
and hold the [Stop/Reset] for at least 5 seconds, and then release it. Using
refilled ink tanks are memorized.
* This operation will release the function for detecting the remaining ink
level

B.
i am not sure but is working on 520
1. print mono or print color for color
2.stop
3.ok
4.on/off

1. Switch the printer OFF
2. Press buttons 1 + 2 + 3 and 4 (simultaneously using four fingers)
3. Keep pressing this four buttons for 10 seconds
4. Release the On/Off button (number 4) (Keeping pressing the others)
5. After a few seconds (when the printer go ON) you can release buttons 1, 2, 3

1. Maybe step "c)" is not needed
2. This procedure was used when I refilled the Black cartridge - try using the ColorCopy button instead of BlackCopy button (number 1) if you refill Color cartridge.
3. Maybe there is no need for all the four buttons - you can try 1 + 4, 2 + 4 or 3 + 4. (or 1+2+4, 1+3+4, 2+3+4)

Hi. That happens sometimes with generic cartridge. It seem that print head is defective.

Check if the service station proper covers the black nozzles when the printhead is parked. Sometimes the mechanics change its position and the printhead dries out.
Try to unclog the nozzles with very hot water. Sometimes it helps. The new printhead is very expensive and you may want to buy a new printer instead.
Remove the printhed, put it in a bowl with the nozzles down and fill with boiled water until the nozzles are covered. Wait 15 min and dry the electric contacts with a dry napkin. Good luck!

On your nozzle check, do you see the grid at the top (indicated by red arrow in picture below)? If you don't see this, your pigment black nozzles aren't working. The black bar at the bottom is from the dye black nozzles (small black tank). You may have either plugged nozzles or a bad print head.

The ink tanks may be full but sometimes the pins that connect the cartridges to the printer may have dried up ink on them preventing the ink from flowing. You can try to swab these with a bit of rubbing alcohol on a Qtip and letting it dry for moment or two. I would strongly suggest doing a couple of deep cleanings first and try test printing of the individual colours separately in a program such as paint to see which colour is affected.

Just make sure the right colors are in the right place, photo magenta is not interchangeable regular magenta. Also run the nozzle check to make sure all colors print, if after 2 deep clean cycles you don't have all colors you may need a new printhead.

Try press and hold reset button for 5+ seconds.

Is it because the ink has run out of the cartridge, replace all the cart

Moski, When trying to align the printer you get a sheet of numbered lines. You want to choose the center most selection that your eyes see as straight lines. Whether they are horizontal or vertical it wants you to tell it which lines look the straightest. From there it will set itself up for proper printing. Tim