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Refurbished: HP ProBook 640 G4 Notebook, Intel Core i5-8250U, 8GB RAM, 256GB SSD, Intel UHD Graphics 620, Windows 10 Pro (Renewed) (640G4-8-256-Pro) - Newegg.com
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Amazon.com: HP ProBook 640 G4 Laptop - 14.0" FHD (1920 x 1080), 8th Gen Intel Core i5-8350U 1.7GHZ, 16GB DDR4 RAM, 256GB SSD, WI-Fi Windows 10 Pro (Renewed) : Electronics
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reassembling HP ProBook 450 G4 Laptop- assemble ProBook 450 G4 -HD, Keyboard, Battery, fan - YouTube
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