I have had this Yamaha reciever for 2 years, and one day it hit a snag. I noticed 'Crackling' noises on the left speaker. I shut it off, then 2 days later I turned it on, the crackling started, then blasted through the left speaker then the reciever shut off, then when I pressed the power button the LED only blinked. It has been sitting on the shelf in my basement for a while, and now I took it up, and opened it up. I checked the power supply, good. Then, I tried the Straight - Info - Tone Control buttons and power button, and it powered up, and said codes - DC PRT : 0 L, and A1-1 DSP MARGIN. Along with that, the Sleep light was blinking and Zone 2 was solid on, even though it wasn't plugged in. I turned the volume on mute thinking it disables the amp, but after a good 30 seconds while searching, I smelled burning silicon, and saw smoke with a fire. I unplugged it and the fire went out on its own. I opened it more, and found a resistor, fully black. Before it wasn't. With the codes showing before the burning silicon, I was able to navigate the menu. I never plugged in a display, maybe that would of shown more info?? Anyway, I dont know what caused the short. Any ideas of what was causing the short? If you need more info, its in the Left Front speaker channel. Thanks, and of course, warranty ended, so its fully Home Fix. Any ideas?