Km3035 prints out a black sheet of paper

Check to see if printer has been set to economy setting which uses less toner and comes out sort of gray.

Probably it's the jammed paper that might caused the error. I suggest have it serviced by the technician. Be aware of the paper handling capacity of your machine to minimize jamming:

3300MFPV_X
Phaser 3300MFPV/X, Copy/Print/Colour Scan/Fax, B&W, 28 ppm, A4, 1200 dpi, 50-sheet ADF, 250-sheet Paper Tray, 50-sheet Multipurpose tray, 150-sheet Output Tray, 96 MB, Automatic 2-sided printing, USB/Ethernet, PCL/PS3, Scanning software, 220 V

If you have random blotches on both sides of the sheet, your printer probably needs cleaning, especially in the fuser section. If the fuser is difficult to get at, here's a good cheat developed for HP LaserJet 6 printers: Use a basic graphics program such as Microsoft Paint to draw three solid black rectangles about 2.5" top to bottom, going all the way across the paper (the space in between is not critical - the key is that you go as close to edge-to-edge as you can get). Print out this sheet.

Put the sheet back in the paper tray so it will print on the blank side (usually printed side up). Open up a quick text processor (Notepad in Windows). Type a single space, then print (some text editors won't print a document with no data in it). Dirt in the fuser will get stuck to the black areas on your cleaning sheet. Test your work by printing another copy of " ". Repeat with a new cleaning sheet if necessary.

The paper feed solenoid is sticking, it can be seen thru a hole in the back with the door opened. Not easy to get to, but I have been able to bend the stop tab slightly and run just fine.

Replace the toner cartridge/drum

you will need to download the driver for leopard after you remove tiger

Paper has different thicknesses called Mils. Make sure you are using the correct paper for your printer. Paper that is thinner than is intended for your printer may sometimes cause it to take multiplesheets.

you may have to clean the print head. since the jam cause the smear, and there still have some ink left on the print head.
you wouldn't get aclean copy till all of the ink trace are gone.

Print out a demo sheet. Press copy and photo at the same time. If the black isn't printing on this demo sheet, (the eyes on the two kids at the top are all white), you need a new printhead. contact kodak tech support. 18004216699. Option 1

Rollers may be worn out and not properly grabbing paper or a gear may be broken. You should be able to inspect by lifting cover to feeder and watching as paper is pulled through.