dealtings.com does not provide end-user technical support on any of the items that we sell. For warranty replacement of defective CPU chips, please call 8668672419. For warranty service on Synnex computers, call Synnex at (800) 756-9888. For all other products, contact the product manufacturer, using the contact information either printed on your invoice or included in the package. Please note that when calling to exchange a defective item, verification of defect by the manufacturer is required.