I have a GX502 that stopped working and I tried RMAing it while it's still under warranty. However, it gave me the message:
Thank you for using the ASUS Online RMA feature. It looks like your serial number (SN:undefined) has already been issued an RMA.
For your reference, the RMA number is undefined. You should have received the RMA instructions in a separate e-mail. Please allow up to 48
hours for it to be sent out.
The laptop hasn't been sent out yet and I'm stuck with a laptop that isn't working.