This article contains the CT670 / CT680 Series Ninja® Smart Screen™ Kitchen System Troubleshooting Guide. This applies to the following SKUs: CT670, CT670V, CT671AV, CT672A, CT672V, CT680, CT680A, CT680SS, CT680SSCCO, CT680SSP, CT680W, CT681, CT682SP, CT682SPBRN and CT682SPC.