I would just call them up and submitt an RMA. The last RMA I sent in didnt need a receipt,they just asked for the SN. The turnaround for me was about 2 weeks.
Here is some helpful info from an email they sent me:
Dear Valued Customer:
If you need immediate assistance, please feel free to contact the RMA Department directly at 510-739-3777 Ext. 5105 to obtain your RMA#.
Please REPLY back to this email to receive your RMA#/Replacement Part.
If you have already received an RMA# for your ASUS product, you may disregard this email. Thank you for supporting ASUS.
Please provide the following information so that we may process your request for warranty repair service. Once we have obtained that information from you, we will issue an RMA # and provide the proper shipping instructions. Please read and provide all of the information below. We cannot complete your request, if all of the information below is not provided.
ASUS Computer International
PLEASE PROVIDE US WITH:
-THE MODEL & SERIAL NUMBER OFF OF YOUR PRODUCT model (name of product) serial# (10 digits/characters long, no dashes) Serial # located on either the top of the purple parallel port (printer port), side of PCI Slots, side of Brown CNR Slot, or the backside of the product itself) -YOUR FULL NAME/NAME OF COMPANY (Please provide name of business if shipping to a company for shipping purposes).
-YOUR SHIPPING ADDRESS (no PO boxes please) -YOUR DAYTIME PHONE/FAX NUMBER -BRIEF DESCRIPTION OF PROBLEM EXPERIENCING
ASUS Computer International (USA) is a warranty repair service center. Please contact place of purchase for credit, refund or upgrade. Asus does not provide these services under any circumstances.
ASUS Does not cover physical damage (physically broken components on the product). Please refer to page 2 of your users manual. There is a $15.00 - $60.00 fee to replace a broken socket. There is a $25.00 - $60.00 fee to repair all other physical damage. If a product is not repairable, the product will be sent back to the customer. If a product is sent in with physical damage, the product will be rejected and customers will not be reimbursed for shipping charges. A payment can be made by check, money order (payable to ASUS), or a credit card#. The payment must be sent in with the damaged product. Customers from Canada must make payments with a credit card#. ASUS warranty covers all malfunctions that are not caused by physical damage to the product.
ASUS CSR Department