Need Help Roland versacamm 540v

My Roland printer has I THINK stopped up lines. And I’m clueless. I don’t know how to get to the lines to check them. I only use Roland ink in the machine and it has never given me any trouble. I’ve had the machine for about 5 years. It printed perfectly the last time I used the printing function. I do routine maintenance and cleaning on it but I don’t even know how to take the lines off of the print heads to check that part. I’ve never had to change anything on it but the cutting blade. Somebody please help me before I roll it outside and set it on fire

 

I used the printing function about 2 months ago and I run the printer thru the cleaning function on the printer but I also use the Roland cleaning solution and clean the heads about once a month and what exactly is a nozzle print test? Do you mean the test print on the printer? Or the test print that I can do thru my program? When I do the test print that is on the printer I only get a couple of lines of blue. I doesn’t print yellow red or black but I did pull the ink thru the lines yesterday so I know the lines aren’t stopped up. When I do the test print thru my software it doesn’t print any color