Just start over and go with seperate components. That way if something dies, you don't have to replace everything.
Initially it may cost a bit more, but that way if the DVD player dies, you can get another DVD player for $39-$200 and not have to re-buy the surround system too.
Same reason I won't buy an all-in-one scanner-fax-printer or a DVD-VCR combo or a DVD-TV combo.
Your only other option at this point is to contact the manufacturer and see if they can RMA it or fix it and send it back.
Combo's have their place, but as you have found out, when one part of the whole goes bad, you are stuck.