after exchanging some e-mails with Yamaha, i called their tech support number to see about getting my cd burner fixed.
their response? no receipt, no help.
i was told that i wouldnt be covered under their warranty unless i had my receipt still. they then gave me two options; one - buy a refurbished cd burner from them for $160, or pay $160 to fix mine. either way, it's not worth it.