LCFC boardLaptop mainboardUpdated 2026-03-06
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NM-B521 schematic & BIOS

LCFC board used in Lenovo ThinkPad X280 FN1KR 2, Lenovo ThinkPad X280. EX280 Lenovo ThinkPad X280 FN1KR 2 Lenovo ThinkPad X280

Files for NM-B521 (9)

TypeFormatFile nameRev SizeAddedDownloadMirror
Schematic .pdf LENOVO NM-B521 REV 1.0 2017-10-06 PDF.pdf 1.0 1.7 MB Telegram —
Schematic .pdf NM-B521_x280 FN1KR-3 PDF .pdf — 1.7 MB Telegram —
Schematic .pdf Lenovo_ThinkPad_X280_FN1KR_2_LCFC_EX280_NM_B521_Rev_0_3_BoardView.pdf 0.3 243 KB Telegram #1
BIOS .rar LENOVO_X280_Type_20KF,20KE_Laptop_Thinkpad_Type_20KE_EX280_NM_B521.rar — 6.3 MB Telegram —
BIOS .rar THINKPAD X280_NM-B521 REV 1_TYPE-C_TESTED BY FST FIX.rar 1 104 KB Telegram —
BIOS .rar X280_Type_20KF,_20KE_Laptop_ThinkPad_Type_20KE_NM_B521_REV_2_0_TASTED.rar 2.0 8.1 MB Telegram —
BIOS .bin NM-B521 X280 .bin — 16 MB Telegram —
BIOS .rar AFS_LENOVO_ThinkPad_EX280_NM_b521_Rev_1_0_X280_Type_20KF,_20KE.rar 1.0 6.1 MB Telegram —
BIOS .rar LENOVO ThinkPad _EX280_NM_b521_Rev_1_0_X280_Type_20KF,_20KE.rar 1.0 6.1 MB Telegram —

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Models using this board

Model names are taken from the file names as published; always confirm the board number printed on your PCB.