The printer cannot read from the computer, what do

It seems there is a possibility of a problem with the printer itself, or perhaps the cartridges. You should first self-test the printer. Since we are unsure where the problem exists, we must do eliminative troubleshooting to rule out parts of the printing system. The self-test allows us to rule out software and the cable by testing the hardware by itself. Please note that this is not a "fix," but rather a diagnostic test to determine if your hardware is at fault.
Please begin by disconnecting the power supply from the wall (not the back of the printer) for at least "30 seconds." Then plug the printer back in.
Next, try this printer self-test by following the steps given below:
1. Power the printer off.
2. Press and hold the "Paper Feed" button.
3. While still holding the "Paper Feed" button, press and release the "Power" button. Continue holding the "Paper Feed" button.
4. When the printer starts pulling paper, release the "Paper Feed" button. It should print a test page at this point.
5. Power the printer off, as this test is continuous.
The self-test should at least print out a set of either a solid black or solid color bars, if not both (if you have a printer with both color and black installed simultaneously). Should this test fail, please try it again without cartridges installed. If the self-test still fails to take paper in and make sounds like the carrier is moving across the paper, this is a hardware issue, and the printer will require service. If the self-test completes without any cartridges installed, run the self-test again with only a color cartridge installed (If you have both black and color cartridges, after this test, run the test again with just the black cartridge installed). If you find that either cartridge causes the self-test to fail, please let us know.
If the self-test prints, but has lines or smudges or other print quality issues, please let us know. This includes any print quality issues - we need to know if the problems you have with your black or color are based in the printer, or communications with your computer, or the computer's software.

If the self-test prints your test bar(s) clearly, the printer hardware is not at fault. The issue may be a communication problem, or perhaps a software conflict.