Table 3. Error messages (continued) Symptom or error FRU or action, in sequence The battery installed is not supported by this system and Replace the battery pack. will not charge. Please replace the battery with the correct Lenovo battery for this system. Press the ESC key to continue. This system does not support batteries that are not Replace the battery pack. genuine Lenovo made or authorized. The system will continue to boot, but may not charge unauthorized batteries. Press the ESC key to continue. Attention: Lenovo has no responsibility for the performance or safety of unauthorized batteries, and provides no warranties for failures or damage arising out of their use. Bottom cover tamper detection error System board The non-volatile system UEFI variable storage is nearly Note: This error indicates that the operating system or full. programs cannot create, modify, or delete data in the non-volatile system UEFI variable storage due to insufficient storage space after POST. The non-volatile system UEFI variable storage is used by the UEFI BIOS and by the operating system or programs. This error occurs when the operating system or programs store large amounts of data in the variable storage. All data needed for POST, such as BIOS setup settings, chipset, or platform configuration data, are stored in a separate UEFI variable storage. Press F1 after the error message is displayed to enter ThinkPad Setup. A dialog asks the user for confirmation to clean up the storage. If the user selects “Yes”, all data that were created by the operating system or programs will be deleted except global variables defined by the Unified Extensible Firmware Interface Specification. If the user selects “No”, all data will be kept, but the operating system or programs will not be able to create, modify, or delete data in the storage. If this error happens at a service center, Lenovo authorized service personnel will clean up the non-volatile system UEFI variable storage using the preceding solution. Beep errors Lenovo SmartBeep technology enables you to decode beep errors with your smartphone when a black screen occurs with beeps from your computer. To decode the beep error with Lenovo SmartBeep technology, do the following: 1. Go to https://support.lenovo.com/smartbeep or scan the following QR Code. 38 T480 Hardware Maintenance Manual