Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great Until Left Channel Went Out

This was a great, affordable and versatile receiver. I bought this to replace a GREAT Sony receiver I had owned for 8 years before the center channel started going out intermittently.Much to my dismay, after only 15 months owning this Pioneer, the front left channel on it starts going out intermittently. I checked and cleaned all hookups and it's something internal. When the channel cuts out you can tap the receiver with your finger and it comes back on for a period. Annoying! I know it's not worth fixing, so I will avoid Pioneer now. I expected this to last at least 5 years or longer.READ THE REVIEWS. I AM NOT THE ONLY ONE WITH THIS PROBLEM!