Lenovo ThinkPad W520 Hardware Maintenance Manual - Page 70
If the system board is being replaced
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If the system board is being replaced, try to read the ECA information from the old system board and transfer the information to the new system. If the system board is inoperable, this will not be possible. 64 Hardware Maintenance Manual
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If the system board is being replaced, try to read the ECA information from the old system board and transfer
the information to the new system. If the system board is inoperable, this will not be possible.
64
Hardware Maintenance Manual