My printer Lexmark z640 won't work how do I change the status from Error to ready?

What is the operating system of your computer? Make sure the correct printer driver compatible with your operating system is installed. Was your Lexmark Z640 working previously? If so, you could try to disconnect the printer from your computer. Then unplug/replug the printer into the power source to reset it. When the printer turns on, reconnect the printer into your computer. Doing this usually fixes minor communication issues.

What is the error message? You need to make a note of this error message and look for the solution within the manufacturer's website knowledge base. The solution available within the website will be model and operating system specific, therefore you need to make a note of them as well. You may also try few basic troubleshooting steps before actually visiting the manufacturer's website knowledge base. Check if the right kind of printer driver is installed and the same is marked as default printer. A check mark along with the printer driver indicates that the printer is selected as default. If you do not see this check mark, then right click on the printer driver and select the option 'set as default'. You may also check the physical connection between the printer and the PC.