Lenovo ThinkPad T420 Hardware Maintenance Manual - Page 154
Lenovo ThinkPad T420 Manual
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Table 9. Parts list-Overall (continued) No. FRU (Overall) FRU no. 21 System board assembly, discrete graphics, AMT, TPM • 4177-CTO, 2Jx, 2Nx, 2Px, Q4x, QBx, RKx, RLx • 4178-CTO, 54x, 55x, 58x, 5Ex, 5Fx, 5Yx, 5Zx, 6Ax, 6Px, 6Rx, 6Vx, 6Wx, 6Xx, 6Yx, 99x, 9Ax, A3x, A4x, A9x, C5x, C6x, C7x, CAx, DJx • 4179-CTO • 4180-CTO, 64x, 65x, J2x, J3x, KLx, KMx, KNx, KPx, KQx, KRx, KSx, KTx, KUx, KVx, KWx, KXx, KYx, KZx, L2x, L3x, L4x, L5x, L6x, L7x, L8x, L9x, LAx, LBx, LCx, LLx, LMx, LQx, LVx, LXx, LYx, LZx, M4x, M5x, M6x, MFx, MGx, MHx, MKx, MMx, MRx, N6x, N7x, N8x, N9x, NAx, NEx, PRx, PSx, PTx, PUx, PWx, PYx, PZx, Q4x, Q5x, QDx • 4236-CTO, 64x, 65x, N4x, NAx, NBx, NDx, NEx, NFx, NPx, NQx, NRx, NSx, NVx, NWx, P2x, PFx, PKx, PNx, PRx, PYx, Q7x, Q8x • 4237-CTO • 4238-CTO 04W2049 21 System board assembly, discrete graphics, AMT, non-TPM • 4177-CTO • 4178-CTO, AXx • 4179-CTO • 4180-CTO, MZx • 4236-CTO • 4237-CTO • 4238-CTO 04W2050 21 System board assembly, discrete graphics, non-AMT, TPM 04W2051 • 4177-CTO, 22x, 23x, 24x, 2Ax, 2Bx, 2Cx, 2Kx, 2Lx, 2Mx, 2Tx, 2Ux, 2Vx, 2Wx, 2Xx, 2Yx, 32x, 33x, 34x, 37x, GFx, GLx, QHx, QPx, QRx, QWx, QXx, QYx, QZx, R4x, RAx, RCx, RDx, RHx, RJx, RQx, RTx, RUx, RWx, RXx, RZx • 4178-CTO, 5Gx, 5Hx, 5Qx, 5Sx, 6Sx, 82x, 94x, 9Dx, 9Ex, 9Hx, 9Jx, 9Kx, 9Lx, 9Mx, 9Nx, A2x, A5x, A6x, AQx, B8x, BFx, BHx, BQx, BRx, BTx, BUx, BVx, BXx, BZx, C4x, CGx, CHx, CMx, CNx, CPx, CQx, CVx, CYx, D3x, D8x, D9x, DCx, DGx, DWx, DXx • 4179-CTO, G9x, GCx, GDx, GHx, GJx, GMx, GNx, GPx, GTx, GUx, GVx, GWx, GXx • 4180-CTO, J4x, M3x, MAx, MTx, MXx, N3x, N4x, N5x, PKx, PLx, PMx, PNx, PPx, PQx, Q6x, Q7x, Q8x, Q9x • 4236-CTO, N9x, PWx, Q3x • 4237-CTO • 4238-CTO 21 System board assembly, discrete graphics, non-AMT, non-TPM • 4177-CTO • 4178-CTO • 4179-CTO • 4180-CTO, 9Sx, 9Tx, 9Ux, 9Xx, AEx • 4236-CTO • 4237-CTO • 4238-CTO 04W2052 CRU ID N N N N 148 ThinkPad T420 and T420i Hardware Maintenance Manual