I'm not experienced on Toshiba anymore but when I was working on them we used as rule of thumb to replace whole developer unit after 3-4 developers,...
Tech for 40+ years on almost the full gamut of brands and equipment. Did hard time as a service manager for a decade. Currently working as a Sr. Tech and Sr. Field Escalations Analyst. Handle phone support for EU's and Field Techs when not flying about the country putting out fires. Company is a Xerox, HP, Canon, Zebra and Lexmark Authorized Partner, but we will work on anything we can get parts for.
Interests:
Homebrewing, My Wife, And Not Falling Off Roofs (Yeah, there's a story there)