I got a new OP-1 today and it was working fine. I charged it for a while, played around with it, then decided to hook it up to my laptop to see what the filesystem was like. While I was doing that I decided to download and install the latest firmware just in case it was running an older version. The install was successful, but after rebooting the device will not come up at all. I get a blank screen, and nothing else. I can hold down the Com button and bring up the TE-Boot screen, and I've tried every option there including wiping the disk and starting over. I've had the synth plugged in to charge all day but it's still doing the same thing at this point. I did email Teenage Engineering but I honestly don't expect a response any time soon.