Hardware Maintenance Manual
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... with ThinkPad products. Before servicing a ThinkPad product, be sure to troubleshoot problems. Important: This manual is intended only for the following ThinkPad® products. ThinkPad T420 and T420i Machine Type 4177, 4178, 4179, 4180, 4236, 4237..., and 4238 Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively. Use this manual along with the advanced diagnostic tests to read all the information under Chapter 1 "Safety information" on page 1 and Chapter 2 "Important service information" on page 23. © Copyright Lenovo...
... with ThinkPad products. Before servicing a ThinkPad product, be sure to troubleshoot problems. Important: This manual is intended only for the following ThinkPad® products. ThinkPad T420 and T420i Machine Type 4177, 4178, 4179, 4180, 4236, 4237..., and 4238 Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively. Use this manual along with the advanced diagnostic tests to read all the information under Chapter 1 "Safety information" on page 1 and Chapter 2 "Important service information" on page 23. © Copyright Lenovo...
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... FRUs" on page 162. Parts list-Overall No. FRU (Overall) a - c See "Miscellaneous parts" on page 155.) 2 ThinkPad b/g/n Wireless (1x1 BGN) 60Y3247 • 4177-CTO, 25x, 26x, 27x, 28x, 29x, 2Ax, 2Bx, 2Cx, 2Dx,... 4180-CTO, LEx, LFx, LGx, LHx, LJx, LKx, LNx, LPx, LRx, LSx, LTx, MAx, PDx, PEx • 4236-CTO, N6x, N7x, N8x, N9x, NCx, NKx, NLx, P4x, PBx, PPx, PQx, QDx, QJx, QKx, QLx • ..., MXx, N3x, N4x, N5x, PJx, PKx, PLx, PMx, PNx, PPx, PQx, Q6x, Q7x, Q8x, Q9x • 4236-CTO, NXx, NYx, P7x, P8x, PCx, PDx, PEx, PJx • 4237-CTO • 4238-CTO 2 Intel Centrino Advanced...
... FRUs" on page 162. Parts list-Overall No. FRU (Overall) a - c See "Miscellaneous parts" on page 155.) 2 ThinkPad b/g/n Wireless (1x1 BGN) 60Y3247 • 4177-CTO, 25x, 26x, 27x, 28x, 29x, 2Ax, 2Bx, 2Cx, 2Dx,... 4180-CTO, LEx, LFx, LGx, LHx, LJx, LKx, LNx, LPx, LRx, LSx, LTx, MAx, PDx, PEx • 4236-CTO, N6x, N7x, N8x, N9x, NCx, NKx, NLx, P4x, PBx, PPx, PQx, QDx, QJx, QKx, QLx • ..., MXx, N3x, N4x, N5x, PJx, PKx, PLx, PMx, PNx, PPx, PQx, Q6x, Q7x, Q8x, Q9x • 4236-CTO, NXx, NYx, P7x, P8x, PCx, PDx, PEx, PJx • 4237-CTO • 4238-CTO 2 Intel Centrino Advanced...
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..., NFx, PAx, PBx, PCx, PEx, PFx, PGx, PMx, PNx, PQx, PRx, PSx, PTx, PUx, PVx, PWx, PXx, PYx, PZx, Q2x, Q3x, Q4x, Q5x, Q8x • 4236-CTO, MBx, N2x, N3x, N4x, N5x, NDx, NEx, NFx, NGx, NHx, NMx, NNx, NPx, NQx, NRx, NSx, NTx, NUx, NVx, NWx, NYx, P2x, P8x, P9x..., PEx, PFx, PGx, PMx, PNx, PQx, PRx, PSx, PTx, PUx, PVx, PWx, PXx, PYx, PZx, Q2x, Q3x, Q4x, Q5x, Q8x, QAx, QCx, QDx, QFx • 4236-CTO, MBx, N2x, N3x, N4x, N5x, NDx, NEx, NFx, NGx, NHx, NMx, NNx, NPx, NQx, NRx, NSx, NTx, NUx, NVx, NWx, NYx, P2x, P8x, P9x...
..., NFx, PAx, PBx, PCx, PEx, PFx, PGx, PMx, PNx, PQx, PRx, PSx, PTx, PUx, PVx, PWx, PXx, PYx, PZx, Q2x, Q3x, Q4x, Q5x, Q8x • 4236-CTO, MBx, N2x, N3x, N4x, N5x, NDx, NEx, NFx, NGx, NHx, NMx, NNx, NPx, NQx, NRx, NSx, NTx, NUx, NVx, NWx, NYx, P2x, P8x, P9x..., PEx, PFx, PGx, PMx, PNx, PQx, PRx, PSx, PTx, PUx, PVx, PWx, PXx, PYx, PZx, Q2x, Q3x, Q4x, Q5x, Q8x, QAx, QCx, QDx, QFx • 4236-CTO, MBx, N2x, N3x, N4x, N5x, NDx, NEx, NFx, NGx, NHx, NMx, NNx, NPx, NQx, NRx, NSx, NTx, NUx, NVx, NWx, NYx, P2x, P8x, P9x...
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...64x, LEx, LFx, LGx, LHx, LJx, LKx, LLx, LMx, M9x, MLx, NCx, NDx, NEx, PDx, PEx, PJx, Q2x • 4236-CTO, 62x, 64x, 65x, N6x, N7x • 4237-CTO • 4238-CTO 5 Modem daughter card (MDC) 60Y3207 • 4177-CTO,... N9x, NAx, NCx, NFx, PDx, PKx, PLx, PMx, PNx, PPx, PQx, PSx, PXx, Q3x, Q6x, Q7x, Q8x, Q9x • 4236-CTO, MBx, N2x, N3x, N4x, N5x, N6x, N7x, N8x, N9x, NAx, NBx, NCx, NDx, NEx, NFx, NGx, NHx, NKx, NLx... 4238-CTO 6 Speaker assembly 04W1633 04W1634 7 Magnesium structure frame assembly 04W1629 CRU ID N N N N 138 ThinkPad T420 and T420i Hardware Maintenance Manual
...64x, LEx, LFx, LGx, LHx, LJx, LKx, LLx, LMx, M9x, MLx, NCx, NDx, NEx, PDx, PEx, PJx, Q2x • 4236-CTO, 62x, 64x, 65x, N6x, N7x • 4237-CTO • 4238-CTO 5 Modem daughter card (MDC) 60Y3207 • 4177-CTO,... N9x, NAx, NCx, NFx, PDx, PKx, PLx, PMx, PNx, PPx, PQx, PSx, PXx, Q3x, Q6x, Q7x, Q8x, Q9x • 4236-CTO, MBx, N2x, N3x, N4x, N5x, N6x, N7x, N8x, N9x, NAx, NBx, NCx, NDx, NEx, NFx, NGx, NHx, NKx, NLx... 4238-CTO 6 Speaker assembly 04W1633 04W1634 7 Magnesium structure frame assembly 04W1629 CRU ID N N N N 138 ThinkPad T420 and T420i Hardware Maintenance Manual
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..., PNx, PPx, PQx, PRx, PSx, PTx, PUx, PVx, PWx, PXx, PYx, PZx, Q2x, Q3x, Q4x, Q5x, Q6x, Q7x, Q8x, Q9x, QAx, QCx, QDx, QFx • 4236-CTO, 62x, 63x, 64x, 65x, MBx, N2x, N3x, N4x, N5x, N6x, N7x, N8x, N9x, NAx, NBx, NCx, NDx, NEx, NFx, NGx, NHx, NKx, NLx, NMx..., QJx, QKx, QLx • 4237-CTO • 4238-CTO 8 DVD-ROM drive • 4177-CTO • 4178-CTO • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO 75Y5117 CRU ID * * Chapter 10. Parts list-Overall (continued) No.
..., PNx, PPx, PQx, PRx, PSx, PTx, PUx, PVx, PWx, PXx, PYx, PZx, Q2x, Q3x, Q4x, Q5x, Q6x, Q7x, Q8x, Q9x, QAx, QCx, QDx, QFx • 4236-CTO, 62x, 63x, 64x, 65x, MBx, N2x, N3x, N4x, N5x, N6x, N7x, N8x, N9x, NAx, NBx, NCx, NDx, NEx, NFx, NGx, NHx, NKx, NLx, NMx..., QJx, QKx, QLx • 4237-CTO • 4238-CTO 8 DVD-ROM drive • 4177-CTO • 4178-CTO • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO 75Y5117 CRU ID * * Chapter 10. Parts list-Overall (continued) No.
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..., NEx, NDx • 4237-CTO • 4238-CTO 60Y5512 9 Audio sub card • 4177-CTO • 4178-CTO • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO 04W1623 10 Audio sub card cable • 4177-CTO • 4178-CTO • 4179-CTO • 4180-CTO..., Q4x, Q5x, Q6x, Q7x, Q8x, Q9x, QAx, QCx, QFx • 4236-CTO, MBx, N2x, N3x, N4x, N5x, N6x, N7x, N8x, N9x, NAx, NBx, NCx, NDx, NEx, NFx, NGx, NHx, NKx, NLx, NMx, NNx, NPx, NQx, NRx, NSx, NTx, CRU ID * N N N N 140 ThinkPad T420 and T420i Hardware Maintenance Manual Parts list-Overall (continued) No...
..., NEx, NDx • 4237-CTO • 4238-CTO 60Y5512 9 Audio sub card • 4177-CTO • 4178-CTO • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO 04W1623 10 Audio sub card cable • 4177-CTO • 4178-CTO • 4179-CTO • 4180-CTO..., Q4x, Q5x, Q6x, Q7x, Q8x, Q9x, QAx, QCx, QFx • 4236-CTO, MBx, N2x, N3x, N4x, N5x, N6x, N7x, N8x, N9x, NAx, NBx, NCx, NDx, NEx, NFx, NGx, NHx, NKx, NLx, NMx, NNx, NPx, NQx, NRx, NSx, NTx, CRU ID * N N N N 140 ThinkPad T420 and T420i Hardware Maintenance Manual Parts list-Overall (continued) No...
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... MHx, MJx, MKx, MMx, MNx, NDx, NEx, PBx, PCx, PRx, PUx, PVx, PWx, PYx, PZx, QDx • 4236-CTO, 62x, 63x, 64x, 65x, NUx, NVx, P7x, PKx, PMx, PNx, PRx, PSx, PTx, PUx, PVx, PWx, PXx...- RJ11 cable with connector • 4177-CTO • 4178-CTO • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO 04W1632 13 Battery pack, Li-ion (4-cell) 55 • 4177-CTO... BWx, BXx, CKx, CLx, CMx, CNx, CPx, CQx • 4179-CTO • 4180-CTO, PJx • 4236-CTO • 4237-CTO • 4238-CTO 42T4883 42T4885 13 Battery pack, Li-ion (6-cell) 55+ 42T4791 • 4177...
... MHx, MJx, MKx, MMx, MNx, NDx, NEx, PBx, PCx, PRx, PUx, PVx, PWx, PYx, PZx, QDx • 4236-CTO, 62x, 63x, 64x, 65x, NUx, NVx, P7x, PKx, PMx, PNx, PRx, PSx, PTx, PUx, PVx, PWx, PXx...- RJ11 cable with connector • 4177-CTO • 4178-CTO • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO 04W1632 13 Battery pack, Li-ion (4-cell) 55 • 4177-CTO... BWx, BXx, CKx, CLx, CMx, CNx, CPx, CQx • 4179-CTO • 4180-CTO, PJx • 4236-CTO • 4237-CTO • 4238-CTO 42T4883 42T4885 13 Battery pack, Li-ion (6-cell) 55+ 42T4791 • 4177...
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...(6-cell) 26+ • 4177-CTO • 4178-CTO • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO 42T4817 42T4819 13 Battery pack, Li-ion (9-cell) 55++ •... cover assembly • 4177-CTO • 4178-CTO • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO 04W1626 14 Base cover assembly (Taiwan 90 W) 04W1627 •...8226; 4179-CTO • 4180-CTO, 64x, 65x, MMx • 4236-CTO, 64x, 65x, NVx, PRx • 4237-CTO • 4238-CTO 142 ThinkPad T420 and T420i Hardware Maintenance Manual CRU ID * * N N Table 9.
...(6-cell) 26+ • 4177-CTO • 4178-CTO • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO 42T4817 42T4819 13 Battery pack, Li-ion (9-cell) 55++ •... cover assembly • 4177-CTO • 4178-CTO • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO 04W1626 14 Base cover assembly (Taiwan 90 W) 04W1627 •...8226; 4179-CTO • 4180-CTO, 64x, 65x, MMx • 4236-CTO, 64x, 65x, NVx, PRx • 4237-CTO • 4238-CTO 142 ThinkPad T420 and T420i Hardware Maintenance Manual CRU ID * * N N Table 9.
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...Integrated Mobile Broadband (Gobi 3000 3G with GPS) • 4177-CTO • 4178-CTO, D4x • 4179-CTO • 4180-CTO, N6x • 4236-CTO • 4237-CTO • 4238-CTO 60Y3257 17 Integrated Mobile Broadband (Gobi 3000 3G with GPS for Malaysia) • 4177-CTO • 4178-CTO... • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO 60Y3283 17 Integrated Mobile Broadband (Ericsson F5521gw) 60Y3279 • 4177-CTO • 4178-CTO, 6Kx, 6Rx, 6Wx...
...Integrated Mobile Broadband (Gobi 3000 3G with GPS) • 4177-CTO • 4178-CTO, D4x • 4179-CTO • 4180-CTO, N6x • 4236-CTO • 4237-CTO • 4238-CTO 60Y3257 17 Integrated Mobile Broadband (Gobi 3000 3G with GPS for Malaysia) • 4177-CTO • 4178-CTO... • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO 60Y3283 17 Integrated Mobile Broadband (Ericsson F5521gw) 60Y3279 • 4177-CTO • 4178-CTO, 6Kx, 6Rx, 6Wx...
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... China Telecom Mobile Broadband TD-SCDMA (Leadcore LC5740) • 4177-CTO • 4178-CTO • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO 17 Integrated China Telecom Mobile Broadband (Huawei EM660) • 4177-CTO • 4178-CTO •...8226; 4180-CTO, LHx, LMx, LVx, Q9x • 4236-CTO, NGx, PJx, QAx, QBx, QFx, QGx • 4237-CTO • 4238-CTO FRU no. 60Y3261 60Y3239 45N8259 41V9756 04W1640 04W1641 45N7217 45N7229 45N7305 45N7285 42T1153 42T1167 CRU ID ** ** ** * * * * 144 ThinkPad T420 and T420i Hardware Maintenance Manual Table 9.
... China Telecom Mobile Broadband TD-SCDMA (Leadcore LC5740) • 4177-CTO • 4178-CTO • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO 17 Integrated China Telecom Mobile Broadband (Huawei EM660) • 4177-CTO • 4178-CTO •...8226; 4180-CTO, LHx, LMx, LVx, Q9x • 4236-CTO, NGx, PJx, QAx, QBx, QFx, QGx • 4237-CTO • 4238-CTO FRU no. 60Y3261 60Y3239 45N8259 41V9756 04W1640 04W1641 45N7217 45N7229 45N7305 45N7285 42T1153 42T1167 CRU ID ** ** ** * * * * 144 ThinkPad T420 and T420i Hardware Maintenance Manual Table 9.
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...-CTO 45N7221 * 45N7309 19 SATA hard disk drive, 160 GB, 7200 rpm • 4177-CTO • 4178-CTO • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO 45N7251 * 45N7271 45N7317 45N7323 42T1157 42T1169 19 SATA hard disk drive, 250 GB, 7200 rpm • 4177-CTO... • 4178-CTO • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO 42T1163 * 42T1173 19 SATA hard disk drive, 320 GB, 7200 rpm 45N7255 * • 4177-CTO, 2Ax, 2Mx, ...
...-CTO 45N7221 * 45N7309 19 SATA hard disk drive, 160 GB, 7200 rpm • 4177-CTO • 4178-CTO • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO 45N7251 * 45N7271 45N7317 45N7323 42T1157 42T1169 19 SATA hard disk drive, 250 GB, 7200 rpm • 4177-CTO... • 4178-CTO • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO 42T1163 * 42T1173 19 SATA hard disk drive, 320 GB, 7200 rpm 45N7255 * • 4177-CTO, 2Ax, 2Mx, ...
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... drive, 128 GB • 4177-CTO • 4178-CTO, 6Yx, 9Rx, BBx, BMx, CVx, D3x • 4179-CTO • 4180-CTO, K4x, NDx • 4236-CTO, NHx, P3x, P4x, P7x, Q3x • 4237-CTO • 4238-CTO 45N8081 45N8007 45N7981 19 Solid state drive, 160 GB 45N8057 • 4177-CTO...NEx, PYx, Q8x • 4236-CTO, 64x, P5x, P6x, P8x, Q2x • 4237-CTO • 4238-CTO 19 Solid state flash drive, 4 GB • 4177-CTO • 4178-CTO • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO 45N8085 CRU ID * * * * 146 ThinkPad T420 and T420i Hardware Maintenance...
... drive, 128 GB • 4177-CTO • 4178-CTO, 6Yx, 9Rx, BBx, BMx, CVx, D3x • 4179-CTO • 4180-CTO, K4x, NDx • 4236-CTO, NHx, P3x, P4x, P7x, Q3x • 4237-CTO • 4238-CTO 45N8081 45N8007 45N7981 19 Solid state drive, 160 GB 45N8057 • 4177-CTO...NEx, PYx, Q8x • 4236-CTO, 64x, P5x, P6x, P8x, Q2x • 4237-CTO • 4238-CTO 19 Solid state flash drive, 4 GB • 4177-CTO • 4178-CTO • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO 45N8085 CRU ID * * * * 146 ThinkPad T420 and T420i Hardware Maintenance...
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... NBx, NCx, NDx, NEx, PAx, PCx, PXx, PNx, Q5x, PQx, PTx, PYx, Q2x, Q3x, Q8x, QCx, QDx • 4236-CTO, 64x, N2x, 62x, NBx, N7x, N9x, NQx, NRx, NSx, PSx, PTx, PUx, PVx, PWx, PXx, PYx, PZx, Q2x...-TPM • 4177-CTO, 37x • 4178-CTO • 4179-CTO • 4180-CTO, QAx • 4236-CTO • 4237-CTO • 4238-CTO 04W2046 21 System board assembly, integrated graphics, non-AMT, TPM 04W2047 ... LFx, LGx, LHx, LJx, LKx, LNx, LPx, LRx, LSx, LTx, MUx, MVx, MWx, NCx, PDx, PEx, PJx • 4236-CTO, N6x, N7x, N8x, NCx, NKx, NLx, NXx, NYx, P4x, P6x, P7x, P8x, PBx, PCx, PDx, PEx, PHx, ...
... NBx, NCx, NDx, NEx, PAx, PCx, PXx, PNx, Q5x, PQx, PTx, PYx, Q2x, Q3x, Q8x, QCx, QDx • 4236-CTO, 64x, N2x, 62x, NBx, N7x, N9x, NQx, NRx, NSx, PSx, PTx, PUx, PVx, PWx, PXx, PYx, PZx, Q2x...-TPM • 4177-CTO, 37x • 4178-CTO • 4179-CTO • 4180-CTO, QAx • 4236-CTO • 4237-CTO • 4238-CTO 04W2046 21 System board assembly, integrated graphics, non-AMT, TPM 04W2047 ... LFx, LGx, LHx, LJx, LKx, LNx, LPx, LRx, LSx, LTx, MUx, MVx, MWx, NCx, PDx, PEx, PJx • 4236-CTO, N6x, N7x, N8x, NCx, NKx, NLx, NXx, NYx, P4x, P6x, P7x, P8x, PBx, PCx, PDx, PEx, PHx, ...
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..., 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...-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 ...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 Table 9.
..., 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...-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 ...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 Table 9.
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..., N6x, N7x, N8x, NBx, PAx, PBx, PCx, PDx, PEx, PFx, PHx, PJx, PVx, PWx, QAx, QCx, QFx • 4236-CTO, 62x, 64x, N3x, N6x, N7x, N8x, N9x, NCx, NMx, NNx, NUx, P3x, P4x, PAx, PBx, Q6x, Q7x, QFx...KYx, KZx, L2x, L3x, L4x, LPx, LQx, M5x, M6x, MFx, MMx, MRx, N2x, N9x, NAx, NFx, PGx • 4236-CTO, N4x, NDx, NEx, NFx, NGx, NPx, NQx, NRx, NVx, NWx, P2x, P9x, PEx, PKx • 4237-CTO ...8226; 4179-CTO • 4180-CTO, PRx, PSx, PTx, PUx, PXx, PYx, PZx, Q2x, Q3x, Q4x, Q5x, QDx • 4236-CTO, PFx, PGx, PLx, PMx, PNx, PRx, PXx, PYx, QBx, QCx • 4237-CTO • 4238-CTO 04W3461 CRU ID ...
..., N6x, N7x, N8x, NBx, PAx, PBx, PCx, PDx, PEx, PFx, PHx, PJx, PVx, PWx, QAx, QCx, QFx • 4236-CTO, 62x, 64x, N3x, N6x, N7x, N8x, N9x, NCx, NMx, NNx, NUx, P3x, P4x, PAx, PBx, Q6x, Q7x, QFx...KYx, KZx, L2x, L3x, L4x, LPx, LQx, M5x, M6x, MFx, MMx, MRx, N2x, N9x, NAx, NFx, PGx • 4236-CTO, N4x, NDx, NEx, NFx, NGx, NPx, NQx, NRx, NVx, NWx, P2x, P9x, PEx, PKx • 4237-CTO ...8226; 4179-CTO • 4180-CTO, PRx, PSx, PTx, PUx, PXx, PYx, PZx, Q2x, Q3x, Q4x, Q5x, QDx • 4236-CTO, PFx, PGx, PLx, PMx, PNx, PRx, PXx, PYx, QBx, QCx • 4237-CTO • 4238-CTO 04W3461 CRU ID ...
Hardware Maintenance Manual
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..., RUx • 4178-CTO, BAx, BBx, BCx, CEx, CFx, CGx, D6x, DHx, DPx, DQx • 4179-CTO, GNx, GPx, GSx • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO 22 PU assembly, Intel Dual Core i3-2370M (2.40 GHz) • 4177-CTO, 32x, RYx, RZx • 4178... • 4179-CTO • 4180-CTO, PKx, PLx, PMx, PNx, PPx, PQx • 4236-CTO, PHx, PJx, PPx, PQx, PUx, PVx, PWx • 4237-CTO • 4238-CTO FRU no. 04W0495 04W1891 04W1892 04W4094 04W0496 04W1893 CRU ID N N N N N N 150 ThinkPad T420 and T420i Hardware Maintenance Manual Parts list-Overall (continued) No. Table 9.
..., RUx • 4178-CTO, BAx, BBx, BCx, CEx, CFx, CGx, D6x, DHx, DPx, DQx • 4179-CTO, GNx, GPx, GSx • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO 22 PU assembly, Intel Dual Core i3-2370M (2.40 GHz) • 4177-CTO, 32x, RYx, RZx • 4178... • 4179-CTO • 4180-CTO, PKx, PLx, PMx, PNx, PPx, PQx • 4236-CTO, PHx, PJx, PPx, PQx, PUx, PVx, PWx • 4237-CTO • 4238-CTO FRU no. 04W0495 04W1891 04W1892 04W4094 04W0496 04W1893 CRU ID N N N N N N 150 ThinkPad T420 and T420i Hardware Maintenance Manual Parts list-Overall (continued) No. Table 9.
Hardware Maintenance Manual
Page 158
... MEx, MRx, MSx, MZx, N2x, NDx, NEx, NFx, PBx, PCx, PUx, PVx, PWx, PXx, PYx, PZx, Q3x • 4236-CTO, N3x, NDx, NEx, PDx, PJx, PKx, PMx, PPx, PQx • 4237-CTO • 4238-CTO 26 Fan assembly, integrated ... PGx, PHx, PJx, PKx, PLx, PMx, PRx, PTx, PUx, PVx, PWx, PYx, PZx, Q4x, Q6x, Q7x, Q9x, QAx • 4236-CTO, 64x, 65x, MBx, N2x, N3x, N4x, N5x, NVx, P3x, P4x, P5x, P6x, P7x, P8x, P9x, PAx, PBx, PCx, PDx... QDx, QHx, QJx, QKx, QLx • 4237-CTO • 4238-CTO CRU ID N N 152 ThinkPad T420 and T420i Hardware Maintenance Manual Table 9. Parts list-Overall (continued) No.
... MEx, MRx, MSx, MZx, N2x, NDx, NEx, NFx, PBx, PCx, PUx, PVx, PWx, PXx, PYx, PZx, Q3x • 4236-CTO, N3x, NDx, NEx, PDx, PJx, PKx, PMx, PPx, PQx • 4237-CTO • 4238-CTO 26 Fan assembly, integrated ... PGx, PHx, PJx, PKx, PLx, PMx, PRx, PTx, PUx, PVx, PWx, PYx, PZx, Q4x, Q6x, Q7x, Q9x, QAx • 4236-CTO, 64x, 65x, MBx, N2x, N3x, N4x, N5x, NVx, P3x, P4x, P5x, P6x, P7x, P8x, P9x, PAx, PBx, PCx, PDx... QDx, QHx, QJx, QKx, QLx • 4237-CTO • 4238-CTO CRU ID N N 152 ThinkPad T420 and T420i Hardware Maintenance Manual Table 9. Parts list-Overall (continued) No.
Hardware Maintenance Manual
Page 160
Table 9. ac power adapter (see "Keyboard" on page 164.) CRU ID N * N 154 ThinkPad T420 and T420i Hardware Maintenance Manual Parts list-Overall (continued) No. PBx, PCx, PDx, PEx, PFx, PGx, PHx, PJx, PKx, PLx, PMx, PNx, PPx, PQx, PRx, ..., PNx, PPx, PQx, PRx, PSx, PTx, PUx, PVx, PWx, PXx, PYx, PZx, Q2x, Q3x, Q4x, Q5x, Q6x, Q7x, Q8x, Q9x, QAx, QCx, QDx, QFx • 4236-CTO, 62x, 63x, 64x, 65x, MBx, N2x, N3x, N4x, N7x, N8x, N9x, NAx, NBx, NCx, NDx, NEx, NFx, NGx, NHx, NKx, NLx, NMx, NNx, NPx...
Table 9. ac power adapter (see "Keyboard" on page 164.) CRU ID N * N 154 ThinkPad T420 and T420i Hardware Maintenance Manual Parts list-Overall (continued) No. PBx, PCx, PDx, PEx, PFx, PGx, PHx, PJx, PKx, PLx, PMx, PNx, PPx, PQx, PRx, ..., PNx, PPx, PQx, PRx, PSx, PTx, PUx, PVx, PWx, PXx, PYx, PZx, Q2x, Q3x, Q4x, Q5x, Q6x, Q7x, Q8x, Q9x, QAx, QCx, QDx, QFx • 4236-CTO, 62x, 63x, 64x, 65x, MBx, N2x, N3x, N4x, N7x, N8x, N9x, NAx, NBx, NCx, NDx, NEx, NFx, NGx, NHx, NKx, NLx, NMx, NNx, NPx...
Hardware Maintenance Manual
Page 163
... and no integrated microphone) • 4177-CTO • 4178-CTO • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO 04W1614 3 LCD module, 14.0-inch HD (1366 x 768) LED backlight ... PHx, PJx, PKx, PLx, PMx, PPx, PQx, PTx, PXx, Q2x, Q6x, Q7x, Q8x, Q9x, QAx, QCx, QFx • 4236-CTO, 62x, 64x, J3x, J4x, K2x, K3x, K4x, K5x, K6x, K7x, K8x, K9x, KAx, KBx, KCx, KDx, KEx, ... NAx, NBx, NEx, NFx, PGx, PNx, PRx, PSx, PUx, PVx, PWx, PYx, PZx, Q3x, Q4x, Q5x, QDx • 4236-CTO, 63x, 65x, MBx, N4x, N6x, N7x, N8x, N9x, NAx, NBx, NEx, NFx, NGx, NHx, NNx, NSx, NTx, NVx...
... and no integrated microphone) • 4177-CTO • 4178-CTO • 4179-CTO • 4180-CTO • 4236-CTO • 4237-CTO • 4238-CTO 04W1614 3 LCD module, 14.0-inch HD (1366 x 768) LED backlight ... PHx, PJx, PKx, PLx, PMx, PPx, PQx, PTx, PXx, Q2x, Q6x, Q7x, Q8x, Q9x, QAx, QCx, QFx • 4236-CTO, 62x, 64x, J3x, J4x, K2x, K3x, K4x, K5x, K6x, K7x, K8x, K9x, KAx, KBx, KCx, KDx, KEx, ... NAx, NBx, NEx, NFx, PGx, PNx, PRx, PSx, PUx, PVx, PWx, PYx, PZx, Q3x, Q4x, Q5x, QDx • 4236-CTO, 63x, 65x, MBx, N4x, N6x, N7x, N8x, N9x, NAx, NBx, NEx, NFx, NGx, NHx, NNx, NSx, NTx, NVx...
Hardware Maintenance Manual
Page 164
..., NEx, PAx, PBx, PCx, PDx, PEx, PFx, PHx, PJx, PKx, PLx, PMx, PPx, PQx, PTx, PXx, Q2x, Q6x, Q7x, Q8x, Q9x, QAx, QCx, QFx • 4236-CTO, 62x, 64x, J3x, J4x, K2x, K3x, K4x, K5x, K6x, K7x, K8x, K9x, KAx, KBx, KCx, KDx, KEx, KFx, KGx, KLx, KMx, KNx, L7x, L8x..., LBx, LQx, LZx, M8x, MBx, MDx, MEx, MFx, MHx, MJx, MKx, MMx, MPx, MQx, MRx, MSx, MYx, MZx, N2x, N5x, N7x, N8x, CRU ID N N N N N 158 ThinkPad T420 and T420i Hardware Maintenance Manual Parts list-LCD FRUs (continued) No. Table 10.
..., NEx, PAx, PBx, PCx, PDx, PEx, PFx, PHx, PJx, PKx, PLx, PMx, PPx, PQx, PTx, PXx, Q2x, Q6x, Q7x, Q8x, Q9x, QAx, QCx, QFx • 4236-CTO, 62x, 64x, J3x, J4x, K2x, K3x, K4x, K5x, K6x, K7x, K8x, K9x, KAx, KBx, KCx, KDx, KEx, KFx, KGx, KLx, KMx, KNx, L7x, L8x..., LBx, LQx, LZx, M8x, MBx, MDx, MEx, MFx, MHx, MJx, MKx, MMx, MPx, MQx, MRx, MSx, MYx, MZx, N2x, N5x, N7x, N8x, CRU ID N N N N N 158 ThinkPad T420 and T420i Hardware Maintenance Manual Parts list-LCD FRUs (continued) No. Table 10.