Table 2. Numeric error codes (continued) Symptom or error FRU or action, in sequence 0270 Have the computer serviced. Real Time Clock Error— System Real Time Clock is not functional. 0271 Set the date and time, using ThinkPad Setup. Check Date and Time settings— Neither the date nor the time is set in the computer. 1802 1. Remove network card. Unauthorized network card is plugged in—Turn off and 2. Replace the system board. remove the network card. 1820 Remove all but the reader that you set up for the More than one external fingerprint reader is attached. authentication. Power off and remove all but the reader that you set up within your main operating system. 2100 1. Reseat the solid-state drive. Detection error on Storage Device (Main HDD) 2. Replace the solid-state drive. 3. Replace the system board. 2101 1. Reseat the M.2 solid-state drive. Detection error on Storage Device (M.2) 2. Replace the M.2 solid-state drive. 3. Replace the system board. 2102 1. Reseat the hard disk drive or the solid-state drive. Detection error on Storage Device (Main HDD) 2. Replace the hard disk drive or the solid-state drive. 3. Replace the system board. 2110 1. Reseat the hard disk drive. Read error on Storage Device (Main HDD) 2. Replace the hard disk drive. 3. Replace the system board. 2111 1. Reseat the M.2 solid-state drive. Read error on Storage Device (Main HDD) 2. Replace the M.2 solid-state drive. 3. Replace the system board. 2112 1. Reseat the hard disk drive or the solid-state drive. Read error on Storage Device (Main HDD) 2. Replace the hard disk drive or the solid-state drive. 3. Replace the system board. 2200 Replace the system board. Machine Type and Serial Number are invalid. 2201 Replace the system board. Machine UUID is invalid Error messages Table 3. Error messages Symptom or error FRU or action, in sequence Fan error. 1. Replace the thermal fan assembly. 2. Apply thermal grease. 3. Replace the system board. Thermal sensing error. Replace the system board. Chapter 4. Related service information 37