Lenovo T420 Tablet User Manual


 
What to do rst
When you do return a FRU, you must include the following information in the parts exchange form or
parts return form that you attach to it:
1. Name and phone number of service technician
2. Date of service
3. Date on which the machine failed
4. Date of purchase
5. Failure symptoms, error codes appearing on the display, and beep symptoms
6. Procedure index and page number in which the failing FRU was detected
7. Failing FRU name and part number
8. Machine type, model number, and serial number
9. Customer's name and address
Note: During the warranty period, the customer may be responsible for repair costs if the computer damage
was caused by misuse, accident, modication, unsuitable physical or operating environment, or improper
maintenance by the customer. Following is a list of some common items that are not covered under warranty
and some symptoms that might indicate that the system was subjected to stress beyond normal use.
Before checking problems with the computer, determine whether the damage is covered under the warranty
by referring to the following list:
The following are not covered under warranty:
LCD panel cracked from the application of excessive force or from being dropped
Scratched (cosmetic) parts
Distortion, deformation, or discoloration of the cosmetic parts
Plastic parts, latches, pins, or connectors that have been cracked or broken by excessive force
Damage caused by liquid spilled into the system
Damage caused by the improper insertion of a PC Card or the installation of an incompatible card
Improper disc insertion or use of an optical drive
Diskette drive damage caused by pressure on the diskette drive cover, foreign material in the drive,
or the insertion of a diskette with multiple labels
Damaged or bent diskette eject button
Fuses blown by attachment of a nonsupported 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 nonwarranted activities:
Missing parts might be a symptom of unauthorized service or modication.
If the spindle of a hard disk drive becomes noisy, it may have been subjected to excessive force,
or dropped.
28 ThinkPad T420 and T420i Hardware Maintenance Manual