Packard Bell EasyNote DT85, Service Manual

Page: 146 / 208

CHAPTER 4: Troubleshooting
140
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 140
•
“Check the battery pack” on page 141
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.
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