Turned on my 10 year old HK AVR300 the other day and had a terribly loud hiss coming through all 5-speakers. Muted speakers but hiss continued. Tried headphones and sound thru jack was clear. Disconnected all speakers and hiss stopped, listened using headphones and sound thru jack was again clear.

Harman/Kardon AVR300
http://www.audioreview.com/mfr/harma...2_2718crx.aspx


I'm debating whether to take it into the shop for repair or to look for a replacement. I love the AVR, and don't really want to replace it. $95.00 bucks just to look at it. Any thoughts from the forum on what could be wrong, how much I should expect to pay to fix-it, and whether I should just replace?



Thanks in advance.