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Fixing the thinkpad T43p fan noise problem
Cpu cooling fan for Lenovo Thinkpad T480 14 inches with Heatsink 01ER497 AT169002DT0 Laptop Cooling Pads - Newegg.com
Lenovo ThinkPad T480s Fan Assembly Replacement - iFixit Repair Guide
X390-Excessive-fan-running-when-plugged-in - English Community - LENOVO COMMUNITY
Thinkpad T480s high pitch fan noise and solution : r/thinkpad