ALL PARTS ARE RE-MANUFACTURED TO ORIGINAL SPECS AND THOROUGHLY TESTED. Part Number 8522490 replaces 8522490, 8522490R. IMPORTANT INSTRUCTIONS PLEASE READ BEFORE ORDERING REPAIR SERVICE IMPORTANT. Send in failed board for repair For REFURBISHING we identify common component failure points and replace 100% of the time to ensure optimal performance.Great option for Discontinued or out of stock parts. 24-48 hour turn around once received.