Canon iP90 error 5C00

try tu plug off cartrij, then plug on again, turn off prin then turn on again, it may fix your problem, see
http://www.fixyourownprinter.com/forums/inkjet/26091

please read through this site

http://www.usa.canon.com/consumer/controller?act=ModelInfoAct&fcategoryid=117&modelid=11009#DownloadDetailAct

5C00 is a purge unit error, the purge is the unit that cleans the printhead on the right hand side. If the printhead will come out of the right side, you will need to check for paper scraps caught in there, If stuck on the right you will need a shop to check it out for you so you don't break anything. You need to remove covers and printhead and check under the printhead in the purge unit.

Canon doesnt sell that purge unit alone because it's too hard to change even for a shop tech. The only option is to replace the entire print engine. QM2-2020-000, and the cost is near the cost of a new printer...

The alternate flashing of orange and green indicates a service call error, something that needs to be taken into a canon authorized service facility for repair. 4 alternate blinking of these lights indicates a problem with the purge unit, most likely requiring replacement.

BCI - 15 is not the same as the BCI -16. The look and feel the same, but the ink is handled differently by the printer - so while, in theory you could use them interchangable, the output would be terrible... Canon set it so that you can only use a BCI 16 in an IP90.

Buy a BCI - 16 cart and try that.

5C00 is Purge unit error.Check for object around the purge unit.

Hi Chris,
Error code 5c00 (flash in orange /green 4 times) indicates that purge unit has broken so that the printhead is locked down when initializing process performed. Sorry I have to say that no first aid for this problem unless you bring it to nearest service centre for part replacement. Hope this information helpful for you.
Regards,

Source:
Canon Inkjet Forum

if your printer is flashing 4 orange and then back to green repeatedly - i found a solution to it for my ip90v - i opened the printer and checked the right hand side cogs - carefully turn them and you may see that some stray paper jam debris is blocking the cleaning unit from returning to its home in the bottom front of the printer - carefully remove it and replace the casing - turn on and with any luck you will have a dully functioning ip90 like i did.

Hope it helps some others out

i took out both printer cartriges then put them back in. there was a window that asks if you replaced the cartriges; click yes then click on the black and color boxes indicating you replaced (re-inserted) both cartriges. for me the light stopped blinking (previously, it was blinking orange 4 times). next i tried to print but only yellow and black appeared. i then cleaned the head 2 times.

to clean:
-go to control panel
-click on printers
-click on printers and faxes
-find your printer, right click on it
-click properties
-find the maintenance tab
-click cleaning
(clean a couple of times if needed)

hopefully it works...