I have a MODX8 that I bought used 4 months ago from Guitar Center. Last night, it stopped booting. When I power it on, the blue super knob light turns on, then off and it appears the board is dead. Nothing happens on the screen and I get no sound. If I power off and on again, it repeats the same behavior. I actually have two PA150 power adapters. Keyboard is behaving exactly the same way with both adapters. I also tried different wall plugs in different houses (it started doing this while I was at band practice). I just contacted Guitar Center and, not surprisingly, they informed me that it is not covered by any warranty under them. Yamaha told me the same thing; factory warranty doesn't transfer to a new buyer when the item is sold used. I'm currently getting it looked at by a local certified servicer, but I'm pretty sure it's going to be a circuit board issue, I'm praying not the motherboard. From now on, I'll be buying new or getting some kind of extended warranty. I'm really mad though because I had an S80 for 20 years. Gigged with it weekly at times and carried it in a soft care the whole time. I never had any issues, but the thing was terribly heavy. I'm worried the light weight plastic is a trade off for durability. I loved the keyboard up to this point with the exception of the flimsy power cable that seems like it wants to break from just looking at it. The key bed isn't great, but definitely good enough for me (and similar to the S80). I don't know of any other keyboard synthesizer that offers this many features, such light weight, for that affordable of a price.
