Lenovo ThinkPad A21e English - A21e(2655) Service and Troubleshooting Guide - Page 19
Solving computer problems, Solving computer problems - bios
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Solving computer problems Troubleshooting If you do not find your problem here, refer to access ThinkPad, your on-board help system. Open Access ThinkPad by pressing the ThinkPad button. The following section only describes problems that might prevent you from accessing this help system. Error messages Note: 1. In the charts, x can be any character. 2. The version of PC-Doctor referred to here is PC-Doctor for Windows. Message Cause and action 0175: Bad CRC1, stop POST task The EEPROM checksum is not correct (block #6). Have the computer serviced. 0187: EAIA data access The access to EEPROM has failed. Have the computer serviced. error 0188: Invalid RFID The EEPROM checksum is not correct (block # 0 and 1, or block # 6). The serialization information system board should be replaced, and the box serial number needs to be area or bad CRC2 reinstalled. Have the computer serviced. 0189: Invalid RFID configuration information area The EEPROM checksum is not correct (block # 4 and 5). The system board should be replaced, and the UUID needs to be reinstalled. Have the computer serviced. 0190: Critical low-battery The computer turned off, because the battery is low. Connect the ac adapter error to the computer and charge the battery pack, or replace the battery pack with a fully charged one. 0200: Hard disk error The hard disk is not working. Make sure the hard disk drive is attached firmly. Run the BIOS Setup Utility; then make sure the hard disk drive is not disabled in the Startup menu. 021x: Keyboard error Make sure that no object is placed on the keyboard or on the external keyboard, if you have one. Turn off the computer, and turn off all attached devices. Turn on the computer first; then turn on the attached devices. If you still see the same error code, do the following: If an external keyboard is connected, do the following: v Turn off the computer and disconnect the external keyboard; then turn on the computer. Make sure that the built-in keyboard operates correctly. If it does, have the external keyboard serviced. v Make sure that the external keyboard is connected to the correct connector. Test the computer, using PC-Doctor. v If the computer stops during the test, have the computer serviced. Chapter 2. Solving computer problems 11