Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Problems

After a month the sound channels went out on this receiver and the output to my TV was only Black & White. Fortunately, there was a certified shop within 30 miles of my house. I brought it to them and they fixed it but it took them 2 months. After getting it back, the same problem happened again after about a month. I moved out of the country before I could get it fixed. Needless to say, I'll never buy another Onkyo. My pioneer didn't have this many problems.