Hardware Maintenance Manual
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IBM Mobile Systems ThinkPad Computer Hardware Maintenance Manual April 2002 This manual supports: ThinkPad T20, T21, T22, T23 (MT 2647/2648) ThinkPad Dock (MT 2631)
IBM Mobile Systems ThinkPad Computer Hardware Maintenance Manual April 2002 This manual supports: ThinkPad T20, T21, T22, T23 (MT 2647/2648) ThinkPad Dock (MT 2631)
Hardware Maintenance Manual
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... problems. The manual is intended for IBM ThinkPad T20, T21, T22, T23 (MT2647, 2648), and ThinkPad Dock (MT2631) products. Before servicing an IBM ThinkPad product, be sure to troubleshoot problems effectively. Use this manual along with the advanced diagnostic tests to review the safety information under "Safety notices: multilingual translations" on page 3, "Safety information" on page 13, and "Laser...
... problems. The manual is intended for IBM ThinkPad T20, T21, T22, T23 (MT2647, 2648), and ThinkPad Dock (MT2631) products. Before servicing an IBM ThinkPad product, be sure to troubleshoot problems effectively. Use this manual along with the advanced diagnostic tests to review the safety information under "Safety notices: multilingual translations" on page 3, "Safety information" on page 13, and "Laser...
Hardware Maintenance Manual
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Contents About this manual iii Introduction 1 Important service information 1 Strategy for replacing FRUs 1 How to use error messages 2 Diskette compatibility matrix 2 Safety notices: multilingual translations 3 Safety information 13 General safety 13 Electrical safety 14 Safety inspection ... Testing the computer 33 Detecting system information with PC-Doctor. . . 34 Power system checkout 35 ThinkPad T20, T21, T22 and T23 series. . . . . 39 Product overview 41 Specifications 43 Status indicators 45 FRU Tests 47 ... pack 60 1020 Backup battery 61 © Copyright IBM Corp. 2002 v
Contents About this manual iii Introduction 1 Important service information 1 Strategy for replacing FRUs 1 How to use error messages 2 Diskette compatibility matrix 2 Safety notices: multilingual translations 3 Safety information 13 General safety 13 Electrical safety 14 Safety inspection ... Testing the computer 33 Detecting system information with PC-Doctor. . . 34 Power system checkout 35 ThinkPad T20, T21, T22 and T23 series. . . . . 39 Product overview 41 Specifications 43 Status indicators 45 FRU Tests 47 ... pack 60 1020 Backup battery 61 © Copyright IBM Corp. 2002 v
Hardware Maintenance Manual
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...IBM device not supported by diagnostic codes in sequence." System board. 0189 Invalid RFID configuration information area-The EEPROM checksum is failed. ThinkPad T20, T21, T22 and T23 series 49 Note: Do the FRU replacement or other actions in the sequence shown in the column headed "FRU or action, in the ThinkPad... notebook computers, see the manual for each error detected in sequence 0175...
...IBM device not supported by diagnostic codes in sequence." System board. 0189 Invalid RFID configuration information area-The EEPROM checksum is failed. ThinkPad T20, T21, T22 and T23 series 49 Note: Do the FRU replacement or other actions in the sequence shown in the column headed "FRU or action, in the ThinkPad... notebook computers, see the manual for each error detected in sequence 0175...