Support folk helping you with printer problems will probably ask these questions:
A. Printer hardware1. What is the make and model number [e.g. HP LaserJet P2055dn, Canon MG5450, etc.]
2. When did it last work OK? [minutes / hours / days / weeks ago / never]
3. What significant events have occurred between then and now? [e.g. Printer moved, lightning storm, power cut, coffee spilt, computer (re)configuration]
4. Are power and data cables correctly plugged in and fully home at both ends?
5. What type of data cable is in use? [ethernet / USB-A / USB-C / parallel / serial / localtalk / firewire - see below for details]
6. After switching it on, what lights are showing on it? Please indicate color and whether flashing or steady.
7. Is a print server (a type of network device) in use? [If "yes", please perform checks 1 to 6 above for it also. There will be at least one data cable connecting the printer, a second data cable going to a wall data outlet or network hub, and a power cable.]
B. Computer side8. Is the problem general for all applications (e.g. SketchUp, Office, MySQL, Adobe Reader, LibraOffice, Draw, etc.), or specific to one of them?
9. What indications or messages show? [you may be able to take a screenshot and email it, describe the indication, or just write down the message]
10. Are there oustanding print jobs in the printer queue? [you can determine this by double-clicking on the printer's icon in Control Panel, Printers] [None, or 0, is normal.]
11. Can you print a test page?
To print a Test Page in Windows 10
a) Click on the Start button, then the Settings icon (looks like a cog, on the left of the screen).
b) Click on Devices in the settings screen displayed, then on "Printers & scanners".
c) Hover over the name and icon of the installed printer to be tested, click to see options, then choose Manage.
d) Click "Print a test page".
To print a Test Page in Windows 7
a) Open Devices and Printers [click the Start button then click Devices and Printers on the Start menu]
b) Right-click the printer you want to test, and then click Printer properties.
c) On the General tab, click "Print Test Page".
To print a test page in Windows XP [your login must have the Print permission]
a) Open Printers and Faxes [click Start, click Control Panel, click Printers and Other Hardware, and then click Printers and Faxes]
b) Right-click the printer you want to test, and then click Properties.
c) On the General tab, click Print Test Page.
d) Click OK if the test page printed correctly. If the test page did not print correctly, click Troubleshoot to open the Print Troubleshooter for help resolving the printing problem.