I installed 2 matrix chips flawlessly. Somebody I know tried installing his for a week with no luck, he finally gave in and asked me for help. After I got his stuff the first thing I was going to do was re flash it. Just to make sure I was going to put a brand new 9volt battery, when removing the battery in there guess what I found. The washer still taped to the programmer under the battery. I removed the chip from the xbox, re flashed it, installed it with the washer and it was perfect. Since then I have installed 3 others and all went in perfect. 1 of them did have a slight problem where it gave me the green lights and after powering it on, it wouldn't boot the bios. I realigned again and it's worked since. I have seen people on these boards that should not be messing with this process. People ranging from I have a chip where do I get the bios? to I couldn't get it aligned so I soldered it and now with the chip off nothing works. I honestly think a lot of the issues here are with the people installing the chip rather than the chip itself. I know there are people that are more experienced than I am and have had problems and in their case it probably is the chip. Unfortunatly there isn't much troubleshooting that can be done and we all know how *sarcastic* easy it is to get ahold of easybuy for a return/refund. Just my 2 cents.