Hi

Do you live in KL/Selangor?

If yes two options

1) There is an audio shop in Amcorp Mall call Unicorn something. They have a technician there that can fix Yamaha stuff

2) The Yamaha service center in Kelana Jaya (the one with Yamaha Music Center)

As for a replacement amp

You can either consider a Yamaha higher series amp (5++ or 6++) or a Denon

Having personally used both and had attempted to use Onkyo, I can tell seriously tell you, you'll appreciate the sound and easy of use of the Yamaha amps, after you had tried to use an Onkyo... Denon are NOT as easy of use as Yamaha but you'll appreciate the Denon when you listen to CDs.

My Two Sen