Acer E600 Service Manual page 30

d. If you write incorrect ISNO, it will prompt an error message "incorrect input",
like
Figure 2-24
Figure 2-24. Write incorrect ISNO
NOTE:
ISNO must be written in accordance with the rules , or write unsuccessful.
The rule is:9+XXXXXX+_CALOK(XXXXXX is the ISNO )
For example:
There is a ISNO:1234567890123456789012 , so we write
91234567890123456789012_CALOK
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