Is it possible to reset the lexmark cartdrige 29 ?

if you check the feeder and the paper exit and its clean
its possible that you have some paper stuck on the fuser
the fuser is the thermal unit you need to open the top and back cover to get access to the fuser

CHECK THIS LINK
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01757325&tmp_task=setupCategory&lc=en&dlc=en&cc=us&lang=en&product=3777182
IT MIGHT BE HELPFULL

this message means that the cartdriges are empty...
if you have bought new cardridges and lights still flash then the printer just dont recognize them right.
possible cause 1:
dirty cartdrige (or printhead) chip contacts > clean them with alcohol and cotton (switch printer off first).
see the chips in this photo:
https://secure.datatekusa.com/images/canon%20PGI5.CLI8%20refillable%20cartridge.jpg

possible cause 2:
bad printer controller: the chip in the printer that communicates with the cartdriges is gone mad... take the printer to service...

all the above are valid assuming you bought original cartdriges if not then do so...

this is the cartridge you want
Lexmark 18C1429E (No. 29) Original Colour (7ml) - This product is suitable for:

Lexmark X2530 Lexmark X2550
note the 18C1429E

black - 28/28A
color - 29/29A
photo - 31

The Black cartridge # is Lexmark # 28A (18C1528)

The Color cartridge # is Lexmark # 29A (18C1529)

The High-Yield (more ink in cartridge) Black cartridge # is Lexmark # 34 (18C0034)

The High-Yield Color cartridge # is Lexmark # 35 (18C0035)

The Photo Color cartridge # is Lexmark # 31 (18C0031)

You need a Lexmark 28 Black and 29 Color. You can get these easily at any Staples store or just try this link:   http://www.staples.com/office/supplies/c29_Inkjet-Laser-Printer-Cartridge-Ink-Toner-Finder-Lexmark-X5495_57173_Lexmark_Brands_27176_Business_Supplies_12328_a400_10051_true

how can i download the lexmark x1185

you can check the old cartridge for reference

For the record the lexmark 29 (18C1429) cartridge is a one time use cartridge (return program cartridge). If you want to get a Lexmark 29 cartridge that you can refill you must buy the 18C1529 Lexmark 29 cartridge. This cartridge can be refilled and reused. The catch, you can only buy this cartridge from Lexmark.com new. I know of one company that sells the remanufacture Lexmark 29 (18C1529) yourinksolution.com.