Lenovo ThinkPad E15 Gen 2 type 20T8, 20T9 GE420 GE520 NM-C771 Rev: 1.0 working bios ThinkPad E14 Gen 2 (type 20T6, 20T7) ThinkPad E15 Gen 2 (type 20T8, 20T9) bios
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