My mp600 keeps saying close inner cover-which is closed

hi,
you mentioned that you turn off and on these is on of the solution of your problem
but in your case it doesn't work

error 6502 arise when ink tanks not snapped properly
follow the steps below

1. Confirm that the printer is powered on and pull open the paper output tray .
   
2. Lift the scanning unit (printer cover) completely. (The print head will move to the replacement position.)
3. Open the inner cover.
   
   
   CAUTION:
   a. Do not try to manually move or stop the Print Head Holder.
   b. Do not touch any metal parts.
4. Press on the mark on the ink tank until the ink tank snaps firmly into place.

note:
Make sure that the ink tank is inserted in the slot that corresponds to the ink tank's color.
5.Ensure that all the ink tanks are installed properly and the ink tank lamps light red.

1 -tank installed properly
2-not installed properly


6. check the status of each ink tank according to the way its lamp flashes.

• - On: The printer is ready to print.
• - Slow flashing (at about three second interval): Ink is low. Prepare a new ink tank.
• - Fast flashing (at about one second interval): Ink tank is empty, or the printer is not ready due to an error.
• - Off: An error has occurred and the printer is not ready to print.

1. • 
     
2. Close the inner cover and the scanning unit (printer cover).
   
   Note:
   
3. 1. When closing the scanning unit (printer cover), be careful not to jam your finger.
      
   2. When starting printing next time, the print head cleaning launches automatically.
4. 
   
5. 
   
6. regards,
7. cseian
   

Use bin and purchase new. Repair costs are high.

Solution available on this fixya topic:

/support/t1579890-ink_cartridge_being_rejected

1. Have you tried turning the printer on/off?
2. Did you replace the cartridges with the power on or off? Most printers require you to replace them with the power on.
3. Try replacing the new one with the old ones. Do you get the same display?
4. On the printer, is there an alignment button?

Good luck!

I had the same problem. My mp630 is also only 4 months old. I replaced all colour ink cartrdiges(inc black), but was only able to release the function for detecting the ink levels for magenta and cyan. Yellow and black then started giving error message U043, with them alternating between working, but never working at the same time. Getting them all clicked in with the lights glowing red does not solve the problem, as once the printer cover is closed, the same error message turns up. The only thing that worked for me is moving the chip slightly out of alignment, by pushing the sliding chip holder, and I only had to do this twice before they all started working and the printer was unlocked.

I had the exact same problem with my brand new MP610, and I finally just turned it off and back on. That appears to have worked.

Hi, please try reseating the print head.

*Confirm that the printer is powered on.

*Open the paper output tray and top cover.
Note: Gently open the paper output tray while holding it.

*After confirming that the print head holder has moved to the center, open the inner cover.

*Remove all ink tanks.

*Raise the print head lock lever and remove the print head.

*Re-seat the print head into the print head holder and lower the print head lock lever until a click is heard.

*Insert the appropriate ink tank into the slot at the right end and push down on the PUSH mark on top of the ink tank until a click is heard. Install the other ink tanks in the same manner.

*Close the inner cover and top cover.
Note: Check that each ink tank is installed in the correct position.

If issue still present call your printer manufacturer for service.

Tirzo

sounds like the inner cover is not seating properly. so, perhaps there is something amiss inside, making that cover not latch cleanly? do a visual inspection(got one of those dental type mirrors?).

start with printer driver updates here

This is a hardware problem nothing to do with software; somewhere inside the printer a cover is not closed correctly.