When I print pictures I have lines every inch on the picture. How do I correct this?

This sounds like the ink cartridges are starting to run low on ink.

model number of the camera please

Robert

Do the magenta lines go outside the picture into the white border? If so, the print head has gone bad, and the cost to replace a print head is more than a new printer.

Yes you can. But 300 dpi is nothing. You could compare this to a question like, fits a yard in a football field.
When talking about 300 dpi, you also must know how big a picture has to be.
According to the manual, your camera can shoot pictures with 4288 by 3216 pixels. When you want to print 300 dpi that is 14 inch by 12 inch pictures. If you want to shoot pictures for smaller results like 6 inch by 4 inch or 7 inch by 5, you can chose a smaller resolution.
Don't be confused by the technical terms of 300 dpi. This is only used in the printing industry. I already printed till 4 times the resolution that was theoretical possible, and still the pictures look very good.
If you have a great picture, shot in the highest resolution, you should be able to make a print of more that 5 or 6 feet and still have a great picture

I have the same issue, It seems 1 line of pixels is overlapping with the next set of pixels and makes a dark line horizontally.

Read and do the diagnostic steps on this HP link:

http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&taskId=110&prodSeriesId=391193&prodTypeId=18972&prodSeriesId=391193&objectID=c00712074

Copy and paste the whole link into your browser.
Let me know the outcome.
If it helped, please rate it.
If not, I will research it some more.

Joe

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

Replace the Magenta Toner cartridge.

Is your transfer roller clean?
How does the drum look on the toner cart?
Is the fuser getting bad?

Would you consider this an old image that is ghosting?

If you are using original cartridges then there should not be a problem. The horizontal lines come from the cartridge. Can you pinpoint if it is a color or black line that is missing? My guess is that during the alignment procedure, you are asked to choose a number or letter that corresponds to picture of a the lines that show the best alignment. If you did this correctly, may I ask how many pictures you printed before seeing that line. Is it on the first print or 10th printing? Cuz if it is on the 5th or more full color picture, then the problem is that you you really have the wrong printer. The F380 capacity for printing full color pictures is miniscule. 1 ml per color. So usually after the 3rd color picture, the ink starts to run out. Let me know if this helps.

If it is a constant lines and they are 5 inches apart it will most likely be a worn fuser. The only solution is to replace the worn fuser.

The fuser is the roller group that heat the toner onto the paper.