Amy you can download a program called redsnow it had an option to create a custom restore file which will put you into DFU mode for restore especially designed for people with a broken button, then try instructions above for rest, or a program called tiny umbrella can put it in recovery mode at the click of a button.
have seen a market stall somehow reprogramme the 8gb version into 32gb version, apparently they have to check the chip that is installed and some are 32gb/64gb versions which failed quality control and can be reprogrammed into their original specs but with the chances that one or two things fail or corrupt!
stick it in the oven, cant remember the temp think its about 280 C or somewhere close, it should be left for just long enough to melt the glue that holds them together but not long enough to melt the plastic, oh one tip, you may need to take the silver backing off, be very very careful with all steps, and dont forget its hot! you should then be able to slip in a very slim tool between lcd and digitiser, get any glue off the lcd while its hot as it will be almost impossible otherwise! but for what you are saving in money it is alot of hassle!
if it is pure white this is a common problem, try a program called recboot, put it in recovery, load itunes till it detects its in recovery, quit itunes, load recboot again and kick it out, now with any luck its sorted! other solution is run battery flat any way that you can leave it when it wont even turn on for a couple of days, then put on charge again and try turning on, hopefully problem sorted!
last one of these that i saw was because the connector had come off the board for the lcd, fortunately not much dissassembly needed for that! other one i saw was a small crack in the lcd at the top middle of the screen, need a replacement screen to sort that!
you put your code in wrong too many times didnt you! or someone did on your behalf, download a program called recboot and put your ipod into recovery mode, connect to itunes and it will restore the ipod to factory and re sync your last backup!
the top left is because you didnt tuck in the black wire, this should fold in on itself when you put the screen back, not over hang into the screen area, the bottom right is usually the screen shield being put back in place slightly wrong take it out and make sure that the 2 hooks are correctly seated on the right hand side, what ever you do dont put any pressure on the top one or you will crack the lcd ruin it!
this is a common problem, look for a program called recboot stick the ipod into recovery mode and wait a min, then connect to itunes, then quit itunes again, run recboot again and kick it out of recovery mode this should sort it out, if not then it is possibly a fault caused by static which can sometimes resolve by running the battery completely flat and leaving alone for a day or so then put a little charge in it again!