Get message "check cover/cart" don't know what this means

I would think one of your colour toners is
empty,the lid has come up (push it down ) or the cart
has come off rail.
LUCK

"Couver Carte" is french for basically, SD Card cover is open. Your first problem is that the camera is setup to language "French" and by using the menus in setup, of the icons if displayed, you can change the setting to "English"

You can attempt to take it to a repair shop or disassemble the camera yourself, either way there are reports that a small lever might be broken. This lever presses a button that then sends a signal to the camera to let it know that the card cover is closed and is ready for use.

Personally, I would let the techinician attempt to fix it or purchase a new camera, as I have seen a lot of complaints for this brand on this simular topic

hi : shunaswim 

the error 50 c means either a cartridge fgone bad or the carrrier inside the printer gone bad .,

possible reason ., : having intalled faultly cart . if u got  refilled cartridge ., then contact retailer ., 

if got a new cart from dell ., call them @ 18006249896 and get a replacement cause the carts have 2 yr warratny on them ., make sure u call them along with the order # of ur purchase .

most importantly : 

u need to know which cart is causin the problem : black or the color ., 

try one cart at a time ., if both the cartridges have the same problem ., the n repalce the printer or the cartridges .

hav a gooday !

Error 1203 is an issue that occurs either when a cartridge is bad or the printer cartridge Slot is bad... I would request you to try cleaning the copper contacts of the both carts and cart slot in the printer and try again.. 
If that doesnt work just call up their support number and check for replacement.. 


Note: Refilling carts may damage the contacts of the carts as well as the printer.

The photoev cart is the photo developer cartridge.

See User Reference
http://www.lexmark.com/publications/pdfs/c510/eng/userref.pdf

Understanding printer messages
pages 184 and 185

"Message:
83 Photodev Cart Exhausted

What this message means:
The photodeveloper cartridge is completely used.

What you can do:
Replace the photodeveloper cartridge.
See also: Replacing the photodeveloper cartridge [page 73]

Continuing below
Message:
83 Photodev Cart Life Warning

What this message means:
The photodeveloper cartridge is nearing the end of its life.

What you can do:
• Press Go to clear the message and continue printing.
• Replace the photodeveloper cartridge.
See also: Replacing the photodeveloper cartridge [page 73]

Continuing below
Message:
83 Photodev Cart Missing

What this message means:
The photodeveloper cartridge is either missing or incorrectly
installed.

What you can do:
Correctly install the photodeveloper cartridge to clear the message and continue printing.
See also: Replacing the photodeveloper cartridge [page 73] "

See User Reference
http://www.lexmark.com/publications/pdfs/c510/eng/userref.pdf

Understanding printer messages
pages 184 and 185

"Message:
83 Photodev Cart Exhausted

What this message means:
The photodeveloper cartridge is completely used.

What you can do:
Replace the photodeveloper cartridge.
See also: Replacing the photodeveloper cartridge [page 73]

Continuing below
Message:
83 Photodev Cart Life Warning

What this message means:
The photodeveloper cartridge is nearing the end of its life.

What you can do:
• Press Go to clear the message and continue printing.
• Replace the photodeveloper cartridge.
See also: Replacing the photodeveloper cartridge [page 73]

Continuing below
Message:
83 Photodev Cart Missing

What this message means:
The photodeveloper cartridge is either missing or incorrectly
installed.

What you can do:
Correctly install the photodeveloper cartridge to clear the message and continue printing.
See also: Replacing the photodeveloper cartridge [page 73] "

Its a Cart error.....one of ur carts have shorted...call 1-800-332-4120...they'll let ya know more...

there are a couple of things did you buy genuine or reman cartridges and check if they are seated properly.
some remans dont work properly so you have to be sure and always get a money back guarantee from the seller

I guess you mean that the printer displays: No cart.

In that case open printer take all carts out, close cover and unplug machine from power for a minute. After reconnecting wait til machine demands carts. Open cover and reinsert carts as shown on display! Make sure that the carts are well positioned and the cart holder is clipped above the top cart cover! Run the cleaning cycle twice.

ok it can be a bunch of things,

1) check the cover that you open to change the cartridge is secure, press down on the top part near the latch that releases it and see if the door switch activated, if you hear the main motor activate then your problem is the locking latch.
2) Change cartridge and /or clean the 2 metal square contacts under the drum, move the drum cover and you can see the 2nd one, use methylated sririts or equivalent and a cloth. Your cartridge may be faulty/old or has leaked toner on the contacts.
If neither of these work you will have to have a visit from a technician as a circuit board may be at fault.