Sort of maybe - it is possible.
I regularly take iPods apart with a Swiss Army Knife during school (both mine and my friends') when they stop working. All that needs to be done is to unplug and replug the battery cable, and all is well (the disk doesn't even need to be touched, but I often replug it for kicks). I've fixed iPods of 1st, 3rd, 4th and Photo generations by doing this, so I can promise you it works. But if you have a 4G with a broken disk, or a Photo with a broken disk, I want to buy!