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HP ProBook 4540s Notebook PC Product Specifications | HP® Customer Support
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IT LAB - HP ProBook 4540s - 15.6" - Core i7 3632QM - 4 GB RAM - 500 GB HDD CPU Intel Core i7 (3rd Gen) 3632QM / 2.2 GHz Max Turbo
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HP ProBook 4540s Optical Drive Replacement - iFixit Repair Guide
