WHERE CAN I FIND PARTS FOR L7780? I NEED THE PAPER HOLDER GUIDE FOR THE TOP PART AND THE PAPER HOLDER FOR WHERE THE PAPER FEEDS OUT AFTER BEING PRINTED?

open the top cover, on the very left there is a part that can be removed (running front to back) I believe you will see a scrap of paper iunder there. remove the paper, replace the part and try again

unplug the printer, inspect it for paper jams, take the printer apart as far as possible and clear any paper jams in it.

for more specific instructions I will need to know the brand and model of your printer.

Thank,
Ekse

I can't help with the legal size issue as I've none to try with here but the 2nd tray I can help with.

Most of the time the problem with tray #2 is that the printer hasn't quite sat properly on top. Try lifting the printer up and shifting the printer about a little so that the gears mesh better... You may need to repeat a couple of times but this usually sorts the issue.

You'll also want to make sure the paper in tray #2 is not help too tightly by the paper guide and if you can fan apart the paper to get some air in between the sheets.

Hope this helps...

I had the same problem, Lift the scanner lid there are directions there. my printer is new and apprently there is a blue thing there that the was on top of the scanner you need to make sure its under it. can't explain well eh sorry, but there are directions under the lid check it out.

it could be the printer settings. Before you actually print something go to File>print:- and then choose properties, click on advanced and ensure that the correct paper and size is set to how you want it.

If the paper is lodged too far into the printer and can't be removed:
Press the power button to turn the printer off.
Pull firmly on the paper to remove it. If you can't reach the paper because it is too far in, raise the front cover and remove the paper from the front of the printer.
Close the front cover.
Press the power button to turn the printer back on.
Resend your document to print.

Ensure that:
The paper is a recommended paper for inkjet printers.
You do not force the paper down into the printer when you load it. For example, if you are loading letter or A4 size paper, the top edge of the paper should extend above the top of the sheet feeder.
The printer is on a flat, level surface.
The left paper guide is against the side of the paper.
You do not load too much paper in the sheet feeder. Depending on the thickness of your paper, the sheet feeder can hold up to 100 sheets of paper.
The left paper guide does not cause the paper to bend in the sheet feeder.
Your printer feeds regular paper as expected. If regular paper feeds without causing problems, load the envelopes vertically against the right side of the sheet feeder. Make sure the paper guide is against the side of the envelopes.
Envelopes or the appropriate specialty papers are selected in the printer driver.
You are using a paper or envelope size supported by your printer.

If it is from the adf which is on the top then there is a small piece of paper stuck in the back. open the lid and you will find a plastic holder in the back. This helps the paper turn through the adf. Usally the paper is in there or this is out of positions which will cause this.

I removed paper from jam, red light will not quit flashing, I turned
printer off and on again, but it will not print and red light will not
quit flashing, What can I do?

If the paper is lodged too far into the printer and can't be removed:
Press the power button to turn the printer off.
Pull firmly on the paper to remove it. If you can't reach the paper because it is too far in, raise the front cover and remove the paper from the front of the printer.
Close the front cover.
Press the power button to turn the printer back on.
Resend your document to print.

Ensure that:
The paper is a recommended paper for inkjet printers.
You do not force the paper down into the printer when you load it. For example, if you are loading letter or A4 size paper, the top edge of the paper should extend above the top of the sheet feeder.
The printer is on a flat, level surface.
The left paper guide is against the side of the paper.
You do not load too much paper in the sheet feeder. Depending on the thickness of your paper, the sheet feeder can hold up to 100 sheets of paper.
The left paper guide does not cause the paper to bend in the sheet feeder.
Your printer feeds regular paper as expected. If regular paper feeds without causing problems, load the envelopes vertically against the right side of the sheet feeder. Make sure the paper guide is against the side of the envelopes.
Envelopes or the appropriate specialty papers are selected in the printer driver.
You are using a paper or envelope size supported by your printer.