By the way guys - just a little info, maybe it will help somebody, who knows. It's not about hacking, but about repairing. If you are experiencing the "NAND corruption" problem, there is a trick that could help - although there is no guarantee at all, but worth to try. My foreign colleague wrote me about this method, when we experienced the same problem (light are blinking, but the oscilloscope do not boot). Try to "turn on" and "turn off" your oscilloscope for a few dozens times. It's not a joke, i am serious. Power on the oscilloscope, wait until lights stop blinking, then turn the oscilloscope off. Wait about 30 sec, or maybe a minute, then repeat the procedure again. My colleague did it 34 times, and at 35 try it worked - the oscilloscope turned on, then he quickly updated the firmware, and voila - it works. I didn't believe him at first, but his boss told me it's true. Then we tried this on our equipment - 28 unsuccessful steps, then 29th try - success! It's pretty random, there is absolutely no guarantee that it will work, but if you have this problem, it could help sometimes.