Printer turning page blue

Have you tried this? Turn the printer off. Then turn it back on. After it settles, with the right/left arrows adjust the indicator in the control panel window to either black/white copies or color copies. Place paper on scanner window and press the OK button. It should print the copy.

your printer ink heads may need to be reset/relined.

Hi,

Solution one: Check the scanner light

1. Follow these steps to check the scanner light by making a color copy of any document.
2. Load plain white, unused, letter size paper in the paper tray.
3. Lift the scanner lid, place the original face down on the scanner glass, and then lower the scanner lid.
4. Make a color copy.
5. When the product starts to scan the document to copy, slightly lift the scanner lid to see if the scanner light turns on. It is not necessary to lift the lid completely.
   

The scanner light should be visible under the scanner glass to the right or left.

Solution two: Check the power connection
Follow these steps to troubleshoot the power connection.

1. Press the Power button to turn off the product.
2. Unplug the product power cord from any surge protector, extension cord, or power strip, and then connect the power cord directly to a wall outlet.
3. Press the Power button to turn on the product.
4. Load plain white, unused, letter size paper in the paper tray.
5. Lift the scanner lid, place the original face down on the scanner glass, and then lower the scanner lid.
6. Try again to make a color copy.
7. Press the Power button to turn off the product, disconnect the power cord from the wall outlet, and then reconnect the power cord to a different wall outlet.
8. Press the Power button to turn on the product.

Try again to make a color copy.If these steps resolved the issue , you do not need to continue troubleshooting.If the issue persists we have to reset the printer. Doing reset in the beginning stage is not recommended. Reply me back and i will provide the reset step instruction.

Regards
Riztech

Hi, did you place paper in tray also horizontal? the paper in tray and on glass must be horizontal if you want to copy A4R size.

DO NOT forget to adjust the blue paper size indicator on paper tray to A4R also.

Also under user mode, under copy sett. you can find option for auto rotate, so copier will adjust size automaticaly.

Hello,

Start up your printer. Wait until it has powered on completely before beginning.

Open the printer's lid and place your item on the copying surface with the side you want copied face-down on the glass. Double-check the alignment.
Shut the printer's lid. For large items, such as books, you may want to remove the printer lid rather than forcing it closed .Choose the kind of copy you want: black-and-white or color. You also may have to select the kind of paper that you are copying.

Size the copy to the page if desired. Some multi-function printers allow you to expand or shrink the original to fit different sizes of paper.
Enter the number of copies you want. You may do this on the multi-function printer or in the print setup of your computer. Make sure the paper tray has enough paper to finish your copying job.

Press the "Start" button. Other names for this might be the "Copy" or "Print" button.
Remove the pages as they are delivered from the printer's feeding mechanism. Do not tug on the copies as they come out. Let them fall into your hands.
Take care.

adjust brightness & contrast settings

check the fixing unit if the adjustment for envelop is activated or not the same. set to normal.

Epson 777 will not print. No paper jam. Power light flashing; red error light on steady. Paper does not feed; if paper supply is placed deeper in feed, entire paper supply (about 12 sheets) feeds thru as one sheet normally would , without printing.

Does the line appear while copying or printing ?

To isolate the issue try to print a self test page :

1. Press and hold the Cancel button and then press the Start Copy Color button.

2. Release both buttons. The self-test page prints.

If you see lines on the test page then the issue is with the cartridge or cartridge contacts. Clean the cartridge and cartridge contacts inside the printer.

rRemove both the cartridges. Using a clean, dry lint-free cloth (a coffee filter works well), wipe the cartridge contacts, from the top to the bottom. The contact area of the cartridge should be rubbed briskly to remove the waxy lubricant material from the gold contacts.
The contacts inside the printer may also require cleaning. Using a clean, dry, lint-free cloth. Gently wipe the contacts, from the top to the bottom.
Reinsert the cartridge and print. If the issue issue persists replace cartridge(s).



If you do not see lines on the test page. Place the same test page on the scanner glass and make a color copy. If the lines are on the copied Image the issue is with the scanner glass.
clean the scanner glass :

Clean the glass and scanner backing

1. Turn off the all-in-one.
2. Unplug the power cord from the wall outlet.
3. Unplug the power cord from the back of the all-in-one.
4. Raise the lid.
5. Clean the glass with a soft dry cloth, or a sponge slightly moistened with non-abrasive glass cleaner or water. CAUTION: Do not use abrasives, acetone, benzene, or carbon tetrachloride on the glass; they can damage it. Do not place or spray liquid directly on the glass; the liquid might seep under the glass and damage the device.
6. Dry the glass with a chamois, cellulose sponge or soft cotton cloth to prevent spotting.
7. Clean the white scanner backing with a soft dry cloth or sponge slightly moistened with water, and allow it to dry.

Try a blank copy

1. Plug the power cord back into the wall outlet.
2. Plug the power cord into the all-in-one.
3. Turn the power on.
4. Close the lid; do not place any paper on the glass.
5. Load paper in the paper tray.
6. Do either of the following:
   • Press Start Copy Black to start a black-and-white copy job.
   • Press Start Copy Color to start a color copy job.
7. If the output is a full/half-black page, or has vertical black lines, the product needs service or contact HP for in warranty replacement.

Thank you .
Silan

take out the printer heads and clean.