• Damage caused by the improper insertion of a personal-computer card (PC card) or the installation of an incompatible card • Improper disc insertion or use of an external optical drive • Fuses blown by attachment of a non-supported device • Forgotten computer password (making the computer unusable) • Sticky keys caused by spilling a liquid onto the keyboard • Use of an incorrect ac power adapter on laptop products The following symptoms might indicate damage caused by non-warranted activities: • Missing parts might be a symptom of unauthorized service or modification. • Check for obvious damage to a hard disk drive.
If the spindle of a hard disk drive becomes noisy, the hard disk drive might have been dropped or subject to excessive force. CRU list Table 1. Model: 14–inch models (Machine type: 82R0, 82R3, 82QC, and 82LV) Table 2. Model: 15–inch models (Machine type: 82R1, 82R4, 82QD, 82LX, and 83B4) 22 IdeaPad Series 1 Hardware Maintenance Manual CRU Type ac power adapter self-service power cord self-service CRU Type ac power adapter self-service power cord self-service