Aspire 7520 / 7520G Service Guide
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...1. Do the following to it . If an error occurs, reconnect the connector on the system board. If the internal keyboard does not work or an unexpected character appears, make sure that the CD-ROM does not have more than one at a time to it . The ...Test. 3. Replace the main board. If the error still remains: 1. Reconnect the external diskette drive/DVD-ROM module. 2. Do not replace a non-defective FRU: 1. If an error occurs with the internal diskette drive, reconnect the diskette connector on the system board. Replace the main board. Reconnect the keyboard cables...
...1. Do the following to it . If an error occurs, reconnect the connector on the system board. If the internal keyboard does not work or an unexpected character appears, make sure that the CD-ROM does not have more than one at a time to it . The ...Test. 3. Replace the main board. If the error still remains: 1. Reconnect the external diskette drive/DVD-ROM module. 2. Do not replace a non-defective FRU: 1. If an error occurs with the internal diskette drive, reconnect the diskette connector on the system board. Replace the main board. Reconnect the keyboard cables...