Hardware Maintenance Manual
Page 20
...the customer. Attention: Another person must be there to lock the wall box in your pocket or behind your body. 14 ThinkPad T20, T21, T22, T23 (MT 2647/2648) Replace any safety device that is near their equipment, rubber floor mats that supplies power to the machine and to ...switch off (EPO) switch, disconnecting switch, or electrical outlet. Many customers have handles covered with live electrical currents. Do not use this type of mat...
...the customer. Attention: Another person must be there to lock the wall box in your pocket or behind your body. 14 ThinkPad T20, T21, T22, T23 (MT 2647/2648) Replace any safety device that is near their equipment, rubber floor mats that supplies power to the machine and to ...switch off (EPO) switch, disconnecting switch, or electrical outlet. Many customers have handles covered with live electrical currents. Do not use this type of mat...
Hardware Maintenance Manual
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...Use a meter to electorostatic discharge Any computer part containing transistors or integrated circuits (ICs) should be the type specified in the parts list. Check for any obvious non-IBM alterations. Begin the checks with . Disconnect the power cord. 3. c. Check inside the unit for ...any obvious unsafe conditions, such as to electrostatic discharge (ESD.) ESD damage can continue without first correcting the problem. Protect against ESD 16 ThinkPad T20, T21, T22, T23 (MT 2647/...
...Use a meter to electorostatic discharge Any computer part containing transistors or integrated circuits (ICs) should be the type specified in the parts list. Check for any obvious non-IBM alterations. Begin the checks with . Disconnect the power cord. 3. c. Check inside the unit for ...any obvious unsafe conditions, such as to electrostatic discharge (ESD.) ESD damage can continue without first correcting the problem. Protect against ESD 16 ThinkPad T20, T21, T22, T23 (MT 2647/...
Hardware Maintenance Manual
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...disk drive becomes noisy, it may have been subjected to stress beyond normal use. v If the spindle of unauthorized service or modification. Machine type, model number, and serial number __ 9. Before checking problems with multiple labels v Damaged or bent diskette eject button v Fuses blown by ...environment, or improper maintenance by foreign material in which the failing FRU was subjected to excessive force, or dropped. 22 ThinkPad T20, T21, T22, T23 (MT 2647/2648) The following are not covered under warranty and some common items that are not covered under warranty: v LCD...
...disk drive becomes noisy, it may have been subjected to stress beyond normal use. v If the spindle of unauthorized service or modification. Machine type, model number, and serial number __ 9. Before checking problems with multiple labels v Damaged or bent diskette eject button v Fuses blown by ...environment, or improper maintenance by foreign material in which the failing FRU was subjected to excessive force, or dropped. 22 ThinkPad T20, T21, T22, T23 (MT 2647/2648) The following are not covered under warranty and some common items that are not covered under warranty: v LCD...
Hardware Maintenance Manual
Page 49
Product overview Feature Description Internal modem 56.6 Kbps Audio v Internal microphone v Internal speaker v Software control volume Infrared transfer IrDA 1.1 802.11b (only Mini PCI Type-IIIa IEEE 802.11b wireless LAN for T23 series) card PC Card One Type-III or two Type-II AC adapter 72-watt type Bay device T20 v 1.44 MB (3-mode), 3.5-inch diskette drive v 10-24x CD-ROM drive v 6x DVD-ROM drive T21, T22, T23 v 1.44 MB (3-mode), 3.5-inch diskette drive v 10-24x CD-ROM drive v 8x DVD-ROM drive v CD-RW drive v DVD/CD-RW combo drive ThinkPad T20, T21, T22 and T23 series 43
Product overview Feature Description Internal modem 56.6 Kbps Audio v Internal microphone v Internal speaker v Software control volume Infrared transfer IrDA 1.1 802.11b (only Mini PCI Type-IIIa IEEE 802.11b wireless LAN for T23 series) card PC Card One Type-III or two Type-II AC adapter 72-watt type Bay device T20 v 1.44 MB (3-mode), 3.5-inch diskette drive v 10-24x CD-ROM drive v 6x DVD-ROM drive T21, T22, T23 v 1.44 MB (3-mode), 3.5-inch diskette drive v 10-24x CD-ROM drive v 8x DVD-ROM drive v CD-RW drive v DVD/CD-RW combo drive ThinkPad T20, T21, T22 and T23 series 43
Hardware Maintenance Manual
Page 55
...configuration information area-The EEPROM checksum is failed. If replacing a FRU does not solve the problem, put the original part back in boldface type. Note For an IBM device not supported by diagnostic codes in this section lists symptoms and errors and their possible causes. Battery pack. This index can be ...Numeric error codes Symptom or error FRU or action, in sequence 0175 Bad CRC1, stop POST task-The EEPROM checksum is displayed for that device. ThinkPad T20, T21, T22 and T23 series 49 System board. 0190 Critical low-battery error 1. Charge the battery pack. 2.
...configuration information area-The EEPROM checksum is failed. If replacing a FRU does not solve the problem, put the original part back in boldface type. Note For an IBM device not supported by diagnostic codes in this section lists symptoms and errors and their possible causes. Battery pack. This index can be ...Numeric error codes Symptom or error FRU or action, in sequence 0175 Bad CRC1, stop POST task-The EEPROM checksum is displayed for that device. ThinkPad T20, T21, T22 and T23 series 49 System board. 0190 Critical low-battery error 1. Charge the battery pack. 2.
Hardware Maintenance Manual
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...0194 Enter the supervisor The computer has been carried password. device that you installed; Reseat the hard-disk drive. 2. Load Setup Defaults in IBM BIOS Setup Utility. 0230 Shadow RAM error-Shadow RAM fails at offset nnnn. 1. System board. 021x Keyboard error Run interactive tests of ... 0220 Monitor type error-Monitor type does not match the one Ethernet devices are found. System board. 0200 Hard disk error-The hard disk is not working. 1. System board. 0231 System RAM error-System RAM fails at offset nnnn. System board. 50 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
...0194 Enter the supervisor The computer has been carried password. device that you installed; Reseat the hard-disk drive. 2. Load Setup Defaults in IBM BIOS Setup Utility. 0230 Shadow RAM error-Shadow RAM fails at offset nnnn. 1. System board. 021x Keyboard error Run interactive tests of ... 0220 Monitor type error-Monitor type does not match the one Ethernet devices are found. System board. 0200 Hard disk error-The hard disk is not working. 1. System board. 0231 System RAM error-System RAM fails at offset nnnn. System board. 50 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
Hardware Maintenance Manual
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...and date. 2. Reset the password by running IBM BIOS Setup Utility. 1. System board. System board. 1. ThinkPad T20, T21, T22 and T23 series 51 Symptom-to reset the time and date. Diskette drive. 2. External FDD cable. 3. System board. 1. DIMM. 2. Replace the backup battery and run IBM BIOS Setup Utility to -FRU index Symptom ... Real time clock error 0271 Date and time error-Neither the date nor the time is set in the computer. 02B2 Incorrect drive A type 02F4 EISA CMOS not writable 02F5 DMA test failed 02F6 Software NMI failed 02F7 Fail-safe timer NMI failed FRU or action, in...
...and date. 2. Reset the password by running IBM BIOS Setup Utility. 1. System board. System board. 1. ThinkPad T20, T21, T22 and T23 series 51 Symptom-to reset the time and date. Diskette drive. 2. External FDD cable. 3. System board. 1. DIMM. 2. Replace the backup battery and run IBM BIOS Setup Utility to -FRU index Symptom ... Real time clock error 0271 Date and time error-Neither the date nor the time is set in the computer. 02B2 Incorrect drive A type 02F4 EISA CMOS not writable 02F5 DMA test failed 02F6 Software NMI failed 02F7 Fail-safe timer NMI failed FRU or action, in...
Hardware Maintenance Manual
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... POST. 1. DIMM. DIMM. 2. DIMM. 3. No beep, power-on indicator on page 49. ThinkPad T20, T21, T22 and T23 series 53 LCD assembly. 3. System board. 2. Start the ThinkPad Configuration program and set . Two short beeps with error codes. Reinstall operating system. The hard-disk .... Three short beeps, pause, three more beeps, or a continuous beep. Reseat DIMM. 2. Type the password and press Enter. System board. Make sure that Alert On LAN 2 in IBM BIOS Setup Utility is set. Two short beeps and a blank screen. 1. System board. 2....
... POST. 1. DIMM. DIMM. 2. DIMM. 3. No beep, power-on indicator on page 49. ThinkPad T20, T21, T22 and T23 series 53 LCD assembly. 3. System board. 2. Start the ThinkPad Configuration program and set . Two short beeps with error codes. Reinstall operating system. The hard-disk .... Three short beeps, pause, three more beeps, or a continuous beep. Reseat DIMM. 2. Type the password and press Enter. System board. Make sure that Alert On LAN 2 in IBM BIOS Setup Utility is set. Two short beeps and a blank screen. 1. System board. 2....
Hardware Maintenance Manual
Page 139
Removing and replacing a FRU 3010 ThinkPad Dock PCI cover Before replacing the PCI cover: There are servicing. ThinkPad T20, T21, T22 and T23 series 133 of the ThinkPad Dock first and choose the proper PCI cover FRU for the ThinkPad Dock you are two types of ThinkPad Dock, as follows: v ThinkPad Dock: FRU no. 08N1546 (PCI cover: FRU no. 05K6246) v ThinkPad Dock with extension plate: FRU no. 08N1537 (PCI cover: FRU no. 08N7317) Confirm the FRU no.
Removing and replacing a FRU 3010 ThinkPad Dock PCI cover Before replacing the PCI cover: There are servicing. ThinkPad T20, T21, T22 and T23 series 133 of the ThinkPad Dock first and choose the proper PCI cover FRU for the ThinkPad Dock you are two types of ThinkPad Dock, as follows: v ThinkPad Dock: FRU no. 08N1546 (PCI cover: FRU no. 05K6246) v ThinkPad Dock with extension plate: FRU no. 08N1537 (PCI cover: FRU no. 08N7317) Confirm the FRU no.
Hardware Maintenance Manual
Page 154
... 2648-xxK 08K6372 for 2648-xxT 08K6370 Base cover for T21 for 2647-all except models xxK 26P9291 for 2647-xxK 04P3446 for 2648-all except models xxK 04P3445 for 2648-xxK 04P3447 (continued) 148 ThinkPad T20, T21, T22, T23 (MT 2647/2648) l See "Miscellaneous parts" on page 167. 1 LCD... xxK 46P2614 3 Fan assembly for T20 08K7066 Fan assembly for T21 04P3448 Fan assembly for T22 for 2647-3xx, 7xx, BxG 08K7268 for 2648-all 26P9317 for 2647-all types or models, unless specific types or models are given. FRU P/N a - Parts list v Each FRU is available for all except...
... 2648-xxK 08K6372 for 2648-xxT 08K6370 Base cover for T21 for 2647-all except models xxK 26P9291 for 2647-xxK 04P3446 for 2648-all except models xxK 04P3445 for 2648-xxK 04P3447 (continued) 148 ThinkPad T20, T21, T22, T23 (MT 2647/2648) l See "Miscellaneous parts" on page 167. 1 LCD... xxK 46P2614 3 Fan assembly for T20 08K7066 Fan assembly for T21 04P3448 Fan assembly for T22 for 2647-3xx, 7xx, BxG 08K7268 for 2648-all 26P9317 for 2647-all types or models, unless specific types or models are given. FRU P/N a - Parts list v Each FRU is available for all except...
Hardware Maintenance Manual
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...) ThinkPad T20, T21, T22 and T23 series... 153 v The FRUs marked with one asterisk are CRUs (customer replaceable units.) v The FRUs marked with OP are given. k See "Miscellaneous parts" on page 167. 1 LCD unit (see "LCD FRUs" on page 157) 2 Keyboard bezel for T23... (all models except xxK) 46P2611 for models xxK 46P2612 3 Fan assembly for T23 26P9166 4 PC Card slots for T23 26P9165 5 I/O card assembly for T23 26P8006 6 Microphone cable assembly 27L0520 7 Base cover for 2647 (T23...cover for 2647 wireless (T23) for models...Base cover for 2648 (T23) for models except 4Nx...
...) ThinkPad T20, T21, T22 and T23 series... 153 v The FRUs marked with one asterisk are CRUs (customer replaceable units.) v The FRUs marked with OP are given. k See "Miscellaneous parts" on page 167. 1 LCD unit (see "LCD FRUs" on page 157) 2 Keyboard bezel for T23... (all models except xxK) 46P2611 for models xxK 46P2612 3 Fan assembly for T23 26P9166 4 PC Card slots for T23 26P9165 5 I/O card assembly for T23 26P8006 6 Microphone cable assembly 27L0520 7 Base cover for 2647 (T23...cover for 2647 wireless (T23) for models...Base cover for 2648 (T23) for models except 4Nx...