Check Fiber Cables : Look for visible damage, sharp bends, or loose connectors. Clean Connectors : Use lint-free wipes and isopropyl alcohol to remove dust or oil. This document presents a troubleshooting guide for fiber optic cables once deployed and in regular use. It also includes a list of common fault location items. As demand for faster, clearer, and more reliable communication increases, technicians find themselves at the. Fiber optic troubleshooting is an essential skill for network administrators, technicians, and engineers responsible for maintaining and repairing fiber optic systems.