Hardware Maintenance Manual
Page 5
...Power system checkout 35 ThinkPad A20m/p, A21m/p and A22m/p. . . . . 39 Product overview 41 Specifications 41 Status indicators 44 FRU tests 46 Fn key combinations 48 Symptom-to-FRU index 49 Numeric error codes 49 Error messages 52 Beep symptoms 53 No beep symptoms 53 LCD-related symptoms 54 Intermittent problems 55 Undetermined problems... 55 FRU replacement notices 56 Screw notices 56 Retaining serial numbers 57 Removing and replacing a FRU 59 1010 Battery pack 60 1020 DIMM 61 1030 Mini PCI adapter 63 © Copyright IBM Corp...
...Power system checkout 35 ThinkPad A20m/p, A21m/p and A22m/p. . . . . 39 Product overview 41 Specifications 41 Status indicators 44 FRU tests 46 Fn key combinations 48 Symptom-to-FRU index 49 Numeric error codes 49 Error messages 52 Beep symptoms 53 No beep symptoms 53 LCD-related symptoms 54 Intermittent problems 55 Undetermined problems... 55 FRU replacement notices 56 Screw notices 56 Retaining serial numbers 57 Removing and replacing a FRU 59 1010 Battery pack 60 1020 DIMM 61 1030 Mini PCI adapter 63 © Copyright IBM Corp...
Hardware Maintenance Manual
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... been disconnected from their normal operating places in identifying potentially unsafe conditions. such touching can continue without first correcting the problem. Power supply units - Blowers and fans - do not become a victim yourself. - As each machine was designed and built, required ...of non-IBM features or options not covered by this inspection guide is conductive; v Do not service the following parts with the power on the frame can cause serious or fatal electrical shock) v Explosive hazards, such as a damaged CRT face or a bulging capacitor 16 ThinkPad A20m/p, A21m/p, A22m...
... been disconnected from their normal operating places in identifying potentially unsafe conditions. such touching can continue without first correcting the problem. Power supply units - Blowers and fans - do not become a victim yourself. - As each machine was designed and built, required ...of non-IBM features or options not covered by this inspection guide is conductive; v Do not service the following parts with the power on the frame can cause serious or fatal electrical shock) v Explosive hazards, such as a damaged CRT face or a bulging capacitor 16 ThinkPad A20m/p, A21m/p, A22m...
Hardware Maintenance Manual
Page 39
... the TrackPoint. For some devices are intended to test only IBM products. To avoid this problem, you need to initialize the computer setup by repeating the operation. To run the test, do as follows: Note: In the following procedures as a guide ... the computer The ThinkPad computer has a test program called PC-Doctor® DOS (hereafter called PC-Doctor). PC-Doctor cannot be powered on page 41. To test the Ultrabay 2000 device, install it to "Power system checkout" on the computer. then power on page 35, and check the power sources. On the IBM BIOS Setup Utility...
... the TrackPoint. For some devices are intended to test only IBM products. To avoid this problem, you need to initialize the computer setup by repeating the operation. To run the test, do as follows: Note: In the following procedures as a guide ... the computer The ThinkPad computer has a test program called PC-Doctor® DOS (hereafter called PC-Doctor). PC-Doctor cannot be powered on page 41. To test the Ultrabay 2000 device, install it to "Power system checkout" on the computer. then power on page 35, and check the power sources. On the IBM BIOS Setup Utility...
Hardware Maintenance Manual
Page 41
... Connect the ac adapter. 4. Check that the battery pack supplies power when you power on the computer. Follow the instructions on the computer. 5. Power off the computer. 6. Check that power is a problem, PC-Doctor shows messages describing it. 6. If there is supplied when you suspect a power problem, see the appropriate one of the following : 1. Note: After executing...
... Connect the ac adapter. 4. Check that the battery pack supplies power when you power on the computer. Follow the instructions on the computer. 5. Power off the computer. 6. Check that power is a problem, PC-Doctor shows messages describing it. 6. If there is supplied when you suspect a power problem, see the appropriate one of the following : 1. Note: After executing...
Hardware Maintenance Manual
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...a discharged battery pack or a battery pack that has less than 50% of the total power remaining when installed in the computer. v If the problem persists, go to "Product overview" on , replace the system board. If the charge ...Checking the ac adapter You are here because the computer fails only when the ac adapter is used: v If the power problem occurs only when the port replicator is used, replace the port replicator. Checkout guide v "Checking the ac adapter"...and let it is still not charged, go to the next section. 36 ThinkPad A20m/p, A21m/p, A22m/p If it return to room temperature.
...a discharged battery pack or a battery pack that has less than 50% of the total power remaining when installed in the computer. v If the problem persists, go to "Product overview" on , replace the system board. If the charge ...Checking the ac adapter You are here because the computer fails only when the ac adapter is used: v If the power problem occurs only when the port replicator is used, replace the port replicator. Checkout guide v "Checking the ac adapter"...and let it is still not charged, go to the next section. 36 ThinkPad A20m/p, A21m/p, A22m/p If it return to room temperature.
Hardware Maintenance Manual
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... Adapter 2. Make sure the modem is not a hardware problem. Lucent Modem (M2) Loopback b. Interactive Tests --> Diskette (continued) 46 ThinkPad A20m/p, A21m/p, A22m/p Intel Modem Register d. Interactive Tests --> Internal Speaker 2. This drift can occur when a slight, steady pressure is applied to enable it. FRU System board Power LCD unit Modem Audio Speaker PC Card slots...
... Adapter 2. Make sure the modem is not a hardware problem. Lucent Modem (M2) Loopback b. Interactive Tests --> Diskette (continued) 46 ThinkPad A20m/p, A21m/p, A22m/p Intel Modem Register d. Interactive Tests --> Internal Speaker 2. This drift can occur when a slight, steady pressure is applied to enable it. FRU System board Power LCD unit Modem Audio Speaker PC Card slots...
Hardware Maintenance Manual
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...the problem does not recur, return the DIMM to its place, remove the other one of them and run Diagnostics --> Memory Test - ThinkPad A20m/p, A21m/p and A22m/p 47 Interactive Tests --> CD-ROM/DVD Test 1. Turn on the computer and check the air turbulence at the louver near the power switch.... 2. Diagnostics --> Other Devices --> CD-ROM/DVD 2. If the test does not detect the error, run the test again. 3. Quick. 2. Full. 1. If two DIMMs are installed, remove one , and run Diagnostics --> Memory Test - Run Diagnostics --> Other Devices --> IBM Fan. FRU...
...the problem does not recur, return the DIMM to its place, remove the other one of them and run Diagnostics --> Memory Test - ThinkPad A20m/p, A21m/p and A22m/p 47 Interactive Tests --> CD-ROM/DVD Test 1. Turn on the computer and check the air turbulence at the louver near the power switch.... 2. Diagnostics --> Other Devices --> CD-ROM/DVD 2. If the test does not detect the error, run the test again. 3. Quick. 2. Full. 1. If two DIMMs are installed, remove one , and run Diagnostics --> Memory Test - Run Diagnostics --> Other Devices --> IBM Fan. FRU...
Hardware Maintenance Manual
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... or more bright dots, 8 or more dark dots, or a total of TFT LCD technology, but excessive pixel problems can cause viewing concerns. Note: A bright dot is a white or colored pixel that are missing, discolored, or ... any background is always off and shows as black. Reseat the LCD connectors. 2. LCD assembly. 54 ThinkPad A20m/p, A21m/p, A22m/p v SXGA+: 11 or more bright dots, 13 or more dark dots, or a total ...of 16 or more bright and dark dots. Symptom or error No beep, power-on indicator on LCD. v ...
... or more bright dots, 8 or more dark dots, or a total of TFT LCD technology, but excessive pixel problems can cause viewing concerns. Note: A bright dot is a white or colored pixel that are missing, discolored, or ... any background is always off and shows as black. Reseat the LCD connectors. 2. LCD assembly. 54 ThinkPad A20m/p, A21m/p, A22m/p v SXGA+: 11 or more bright dots, 13 or more dark dots, or a total ...of 16 or more bright and dark dots. Symptom or error No beep, power-on indicator on LCD. v ...
Hardware Maintenance Manual
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... is inoperative. LCD assembly ThinkPad A20m/p, A21m/p and A22m/p 55 If any damaged FRU. 3. Power off the computer. 2. Determine whether the problem has changed. 6. Intermittent problems Symptom-to-FRU index Intermittent system hang problems can be considered only when a problem recurs. Rerun the test ...2. System board b. FRU replacement should be due to verify that have nothing to the port replicator c. Non-IBM devices b. When analyzing an intermittent problem, do not replace a nondefective FRU): a. Run the diagnostic test for damage. External diskette drive g. PC Cards...
... is inoperative. LCD assembly ThinkPad A20m/p, A21m/p and A22m/p 55 If any damaged FRU. 3. Power off the computer. 2. Determine whether the problem has changed. 6. Intermittent problems Symptom-to-FRU index Intermittent system hang problems can be considered only when a problem recurs. Rerun the test ...2. System board b. FRU replacement should be due to verify that have nothing to the port replicator c. Non-IBM devices b. When analyzing an intermittent problem, do not replace a nondefective FRU): a. Run the diagnostic test for damage. External diskette drive g. PC Cards...