Both paper and cartrige lights blink & E in coppies won't leave

The blinking is just an attention light so there's nothing to worry about that. Try adjusting your paper tray to the paper size you are about to use. Or try checking the duplexer panif its positioned properly. Hope this helps.

Error description:

The Attention (red) light is blinking. There are six possible causes that will display the Attention light pattern:

-Paper out
-Door open
-Print cartridge missing
-Paper jam
-Paper sensor jammed
-Duplexer error

Solution :
After the cause of the problem has been addressed, pressing GO will cause the printer to attempt to recover from the cause of the error. If the printer is unsuccessful, it will continue to display the Attention message until the cause is remedied.

Pressing JOB CANCEL will cancel the print job and the printer will return to the Ready state (Ready light on) unless there is a paper jam still in the printer or the print cartridge is not in the printer.

For more details visit the link below :

Resolve Printer issue

Was the green paper the type kids use in school. When my kids were little we called it contruction paper. If this is the case, your printer is smart enough to know that this paper is thicker than normal. It's responding as it should. Next time you want to print on this type of paper - select this in your printer's software control panel.

look for a small switch or, a small red light (infared sensor) in the paper well (where the paper enters) repair the switch or, clean the lens of the sensor

Probably you are printing for a legal size paper on letter paper. Check the paper size and be sure you have letter 8 1/2 X 11, or whatever real paper you are loading on the printer.

Instead of pushing the Ok button you should push the "Start Copy - Black" or "Start Copy - Color".

sorry I got it, usually you may try:
1) check all paper road no paper inside include the area betweem input tray and cartridge unit the area wetween cartridge and fuser unit and output tray.
2) check 4 sensor input sensor near the input tray roller, marging sensor between input roller and cartridge unit, cartridge sensor at oneside of cartridge unit body, fuser sensor near fuser roller. usually need to clean or adjustment the position.
3) check input roller and cartridge unit and fuser unit at running condition when the power on.
anyone nothing running show error light blink, also show the hardware trouble if all sensors are normal.

MY PRINTER WONT PRINT FROM THE COMPUTER. IT WILL COPY A PAPER, BUT NOTHING FROM THE COMPUTER COMMAND.

Unfortunately, HP didn't make this indicator very descriptive. Their product specification page for this printer states that the blinking Attention light, "indicates that the printer media input trays are empty, the print cartridge door is open, the print cartridge is missing, or other errors".

You've already changed the print cartridge and the light is still blinking, so you should take a look at the other conditions described such as an empty paper tray, open door, and so forth. You also will want to look for a paper jam or carriage jam. These are two very common errors that will result in a blinking Attention light.

HP.com does provide a web page that describes a specific problem associated with a blinking Attention light:

Job Stuck in Queue

See if any of these suggestions work out for you. If not, post back your results along with anything else that you've learned about the problem. Good luck.

All of the lights flash and it wont print or do anything else. The ink cartriges are new I replaced them right before it happened can you please help?