Your best bet of course.
I have owned two Acurus 200FIVEs, same as Aragon 2007 minus two channels, and one of them was purchased with a blown channel. Took it to my local electronics repair guy and yes the fuse was blown but that was due to a faulty output transistor on a single channel. Back then, about 13 years ago, I think I paid about $125.00 for the repair.
Bill