After installing a new VLM cartridge in my 7900 the printer proceeded to make machine-gun sound every 4 to 5 seconds. It was suggested that this is a pumping sound possibly attributable an air leak or possible cartridge warp. When I remove and replace the cartridge the noise stops but only for a minute or so. When I attempt to print, the noise re-occurs. I’m using other cartridges without this problem.
Appreciate your help.