Lenovo ThinkPad L520 Hardware Maintenance Manual - Page 5
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About this manual This manual contains service and reference information for the following ThinkPad® Notebook products. ThinkPad L420 Machine Type (MT) 7826, 7827, 7829, 7853, 7854, and 7856 ThinkPad L421 MT 7826, 7827, 7829, 7853, 7854, and 7856 ThinkPad L520 MT 5015, 5016, 5017, 5019, 7859, and 7860 Use this manual along with the advanced diagnostic tests to troubleshoot problems. Important: This manual is intended only for trained service technicians who are familiar with ThinkPad products. Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively. Before servicing a ThinkPad product, be sure to read all the information under Chapter 1 "Safety information" on page 1 and Chapter 2 "Important service information" on page 25. © Copyright Lenovo 2011, 2012 iii
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