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• 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: Lenovo IdeaPad S740-15IRH/Lenovo IdeaPad S740-15IRH Touch (Machine type: 81NY/81NW)
CRU
ac power adapter
power cord
22
Lenovo IdeaPad S740-15IRH Hardware Maintenance Manual
Type
self-service
self-service
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