My G560/G460/Z460/Z560 fan is running at 100% upon boot up. No matter what I do, the fan does not slow down, but just continues to run at full speed whether on AC or battery and regardless of activitiy on the system. Even when idle, the fan remains on high speed.
If you have already updated to the latest BIOS and the system has always exhibited this symptom, contact technical support for further diagnosis and service. In a limited number of cases, system service may be required to address this issue.