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T450s won't boot: mute, mic & Fn buttons on; power LED flashes 3x when AC power connected. Help? : r/thinkpad
Lenovo Thinkpad T540 suddenly not charging and power button flashing - Lenovo Thinkpad T450s - iFixit
battery-indicator-light-orange-light-is-Blinking-even-after-shutdown - English Community - LENOVO COMMUNITY
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