Lenovo 1304XF8 Manual Do Utilizador

If you suspect a power problem, see the appropriate one of the following power 

supply checkouts:
•  “Checking the AC adapter ” on page 21
•  “Checking the battery pack ” on page 22

You are here because the computer fails only when the AC adapter is used. 

If the power-on indicator does not turn on, check the power cord of the AC 

• 

adapter for correct continuity and installation.

To check the AC adapter, follow the steps below:
1.  Unplug the AC adapter cable from the tablet.
2.  Measure the output voltage at the plug of the AC adapter cable. See the 

following figure:

+20

0

1

2

1

2

Note: Output voltage for the AC adapter pin No. 2 may differ from the one you 

are servicing.
3.  If the voltage is not correct, replace the AC adapter.
4.  If the voltage is acceptable, do the following: 

Replace the system board.

• 

If the problem continues, go to 

• 

Note: Noise from the AC adapter does not always indicate a defect.