Welcome to the forums. Unfortunately, the amps on the promedias have known issues due to not having a way to discipate heat. My previous promedia lasted only a few weeks (bought it used) and the amp died. My current set is doing ok but the amp plate is too hot to touch for more than 3-5 seconds. Even if I do not have the sound playing, the amp still gets blazing hot.
Unfortunately, your promedia is way past the warranty period. If Klipsch were to fix it for free (don't believe they would), it would have to be an exception. Best wishes. It's an awesome system, when it works.
5.2 Dedicated Home TheaterPanasonic AE3000u Projector
103" Elite Cinescope (2.35:1) Screen
Harman Kardon AVR 3600
Parasound HCA2205a (220w x 5) Amp
Klipsch RF-83 (Cherry)
Klipsch RC-64 (Cherry)
Klipsch RS-62 (Black)
Klipsch RSW-15 (Maple)
PS3 (80 gig) for Blu-ray
Harmony One Remote
DIY Acoustic Panels
2ch Living RoomB&W DM604 S3
Harman Kardon HK3490
Marantz DVD
3ch Bedroom SystemKlipsch RF-7
Klipsch RC-7
Yamaha RX-V1700
Rotel RB-960BX (60w x 2) Amplifier
Marantz DV4500 DVD Player
My HT Build threadPhoto Gallery of Completed Theater Room