Sheet is not been detected

A flashing yellow light usually means a low battery. When the light turns green, the battery is fully charged. It is helpful to list brand and model number because flashing lights similar to beeps from a computer, are usually brand specific codes which can be looked up on a chart to interpret.

from the manual:

5 times ASF (cam) sensor error [5700] - Sheet feed unit (QM2-1220)

Unless you can see some easy to fix problem with the sheet feeder ... its probably cheaper
to buy a new printer.

Could you tell me what the error message says?

How old is this printer?

Kodak EasyShare 5100 series
Clean the print head then print a demo sheet.

1. Verify that inkjet paper is loaded in the paper trays.
2. On your desktop, start the KODAK All-in-One Home Center, then select the Help [?] icon.
3. From the Help menu, select Maintenance, then select Print head Cleaning. The On/Off light flashes green during the cleaning procedure.
4. When the On/Off light glows a steady green, press Photo and Copy simultaneously to print a demo sheet.

If the Demo print is bad- IE: no black, blurry print etc., then you may need to replace the print head:
http://www.kodak.com/global/plugins/acrobat/en/service/manuals/AiOPrinters/printhead/AUR1780-9_UE_RevC.pdf

Click on this link or copy and paste the complete link into your browser.
If I could be of further assistance, let me know. If this helps or solves the issue, please rate it.
Thanks, Joe

put more paper in

Turn off printer
Hold down green button
Power on printer. (cold reset)
In printer properties choose print directly to printer, then choose print test page.

Weird problem

There actually was a misfed sheet, hidden at the very bottom of the lower hinged back panel. The reason it was misfed was that this panel had somehow gone off one of its hinges. Ironically I did not discover the misfed sheet until I had taken the printer down from its shelf and turned it over to read the serial number to the extended warranty tech support guy.

Moral: Open every panel carefully, check for misalignment. These printers have flimsy plastic parts.

first check the green led on the panel (feeder selection) normally for cut sheet must be on the right side and for roll on the left side.

Inside the top of the dryer there should be a sheet of paper with an electrical diagram and it has a section to interpret the blinking lights

Disconnect the printer's outlet
Hold the Botton of power while connecting to the outlet
Holding down the power button pressed twice the reset button (red circle with a triangle)
Release the power button
The printer takes about 10 seconds into the show vaor numeroco zero.
Pressing + to the value moves from 0 to 1.
When this value to 1, press the button that is on par with reset, this will light up two lamps
One is that of plain papaer and the other of photo paper, at this point is put paper into the printer
Pressing the power button once or twice (it does not matter), the printer will print a proof sheet
When you print this sheet the value in the display returns to zero, leaving it well
Open scan cover (to remove the cartridges but was not removed), with the lid open faith disconnect the power to printer
Remove the cartridge, close the lid and turn on the printer.
Re-positioned and Refill cartridges in the printer and READY.