PROBLEM HUB
USB-C troubleshooting
USB-C failures usually look simple and cost money fast: a black monitor, a slow laptop, a dock that ignores Ethernet, or a charger that feels too hot. Start with the failed link in the chain, then compare the exact spec before replacing anything.
FAST DIAGNOSIS
Fix the chain before you buy
desk failureUSB-C dock monitor checkerCheck whether a dock class matches your laptop, displays, refresh rate, and charging needs.slow chargingUSB-C charger calculatorEstimate the wattage tier you should compare before replacing a charger or cable.buying pathCharging and power hubMove from the failure diagnosis into charger, cable, power-bank, and dock buying guides.
High-intent USB-C fixes
These pages target users who already hit a failure and are close to buying a replacement.
USB-C dock not detecting two monitorsUSB-C Dock Not Detecting Two MonitorsMost dual-monitor dock failures come from a mismatch in host display support, dock capability, cable quality, or refresh-rate demand. Find that mismatch before spending.Diagnose problemUSB-C cable charges but no videoUSB-C Cable Charges but No Video FixCharging success does not prove video support. USB-C is the connector shape; display output depends on the port, cable, adapter, and monitor path.Diagnose problem100W USB-C charger slow100W USB-C Charger Charging Laptop SlowlyThe charger headline is only a ceiling. Real speed is negotiated by the charger, cable, laptop, port split, temperature, and what the laptop is doing.Diagnose problemMacBook dual monitor dockMacBook Dual-Monitor Dock LimitationsFor MacBooks, the dock is not the first question. The exact chip and display-support specification decide whether two external monitors are native.Diagnose problemUSB-C hub HDMI not workingUSB-C Hub HDMI Not Working Fix GuideHDMI failure on a USB-C hub is usually a compatibility-chain issue. Confirm port video support, hub power, cable quality, and monitor mode before spending.Diagnose problemThunderbolt dock not charging laptopThunderbolt Dock Not Charging LaptopA dock can be good for video and bad for charging in the same setup. Treat host charging as a separate spec, then compare wattage, cable, and port support.Diagnose problemUSB-C monitor not charging laptopUSB-C Monitor Not Charging Laptop FixOne-cable monitor desks work only when video and power both fit the laptop. Treat monitor wattage as a purchase spec, not a convenience detail.Diagnose problemportable monitor no signal USB-CPortable Monitor No Signal over USB-CPortable monitors are unforgiving because one cable may need to carry video and power. Confirm host video, cable class, and monitor power before spending.Diagnose problemUSB-C cable slow file transferUSB-C Cable Slow File Transfer Fix GuideThe USB-C connector hides very different data speeds. File transfer speed depends on cable data rating, port generation, drive limits, heat, and file workload.Diagnose problemUSB-C charger gets hotUSB-C Charger Gets Hot Safety GuideWarm is common; unsafe is different. Watch for excessive heat, damaged cables, blocked ventilation, mystery brands, unstable output, and symptoms beyond normal charging warmth.Diagnose problemUSB-C dock Ethernet not workingUSB-C Dock Ethernet Not Working FixDock Ethernet failures are often driver or negotiation problems. Test the cable, router, dock power, OS driver, and chipset before buying a replacement.Diagnose problem