The HP 5188-2756 Pavilion Onyx Gl8E System Board is in in stock at Calhoun Technologies. For over 10 years Calhoun Technologies has been saving companies likes your up to 80% off list price on hard to find computer hardware. Manufacturer: HP Part Number: 5188-2756 Details: HP 5188-2756 Pavilion Onyx Gl8E System Board