CHAPTER 4: Troubleshooting
98
Testing the memory
Memory errors can stop your programs, show error messages on the screen, or
hang the system.
To test the memory:
1
Boot from the diagnostics diskette and start the diagnostics program.
2
Run the Memory Test and see if the test completes successfully.
3
Press F2 in the test items.
4
Follow the instructions in the message window.
Testing the power system
To test for a power problem:
•
Turn on the notebook using each of the following power sources:
•
Remove the battery pack, connect the power adapter, then make sure
that the notebook turns on using AC power.
•
Disconnect the power adapter, install a charged battery pack, then make
sure that power is supplied by the battery pack.
If you suspect a power problem, complete the appropriate power supply check:
•
“Check the power adapter” on page 98
•
“Check the battery pack” on page 99
Check the power adapter
Unplug the power adapter cable from the notebook and measure the output
voltage at the power adapter cable plug. See the following figure.
•
If the voltage is not correct, replace the power adapter.
•
If the voltage is within the range, do the following:
•
Replace the system board.
•
If the problem is not corrected, see
“Undetermined problems” on page
113
.
•
If the power-on indicator does not light up, check the power adapter’s
power cord for correct continuity and installation.
•
If the operational charge does not work,
see “Check the battery pack”
on page 99
.
Important
Make sure that each memory card is fully installed into the connector.
A loose connection can cause an error.
Pin 1: +19 to +20.5V
Pin 2: 0V, Ground
Important
An audible noise from the power adapter does not always indicate
a defect.
Содержание EasyNote NM85
Страница 1: ...EasyNote NM85 NM86 NM87 NM89 NM98 SERVICEGUIDE ...
Страница 6: ...Contents iv ...
Страница 12: ...CHAPTER 1 System specifications 6 System block diagram ...
Страница 38: ...CHAPTER 2 System utilities 32 ...
Страница 100: ...CHAPTER 3 Replacing notebook components 94 ...
Страница 120: ...CHAPTER 4 Troubleshooting 114 ...
Страница 121: ...CHAPTER5 115 Connector locations System board layout ...
Страница 125: ...CHAPTER6 119 FRU Field Replaceable Unit list Introduction Exploded diagram FRU list ...
Страница 133: ...APPENDIXA 127 Test compatible components Introduction Microsoft Windows 7 Compatibility Test ...
Страница 137: ...APPENDIXB 131 Online support information ...
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Страница 142: ...MAN NV5x SVC GDE R1 04 09 ...