Ruined my Ipod in large part (but not only) because of how poorly this guide is written. 4 parts broken that don't have spare parts...mostly broken ribbons. Please re-write this guide by factoring in all the advice and correction in the commons. This guide is so very far from emphasizing enough paranoid levels of extra care, details and warnings on the key steps where you can irreversibly break the ipod in ways that are unfixable.

You should reduce your risk of breaking anything by diligently following my comments. Though I have stopped at step 20 so you're on your own after that.

READ THIS BEFORE DOING THIS STEP

1) You don't need a special tool for this, or any step reuquiring to unglue ribbon cables. Just cut some of that hard transparent molded plastic from some packaging (it's thinner) or take-away food box (thicker and less ideal). It's gentle and thin enough to go tricky places and you can make it pointy or shape is as you like. that works for you to gently get under those glued ribbons and pull them out from the glue.

2) Makes more sense to do step 18 first, while the ribbon and socket+ribbon it goes into are still glued, then unglue them. So basically Step 18, then 17, then 19.

READ BEFORE DOING THIS STEP

PRECAUTION #1: How far to push the spudger in without breaking the electronics? Only about 3 cm in (or 1.5 inches for those from a country with a strange unit system), NO FURTHER, you will break the electronics further down. The glue is a 5mm strip going on the sides and at the top of the battery. There's not much of it so don't spudger like a brute or too deep.

PRECAUTION #2: READ THE NEXT STEP, you must NOT slide the battery down more than 1 cm (or half an inch!) or you will break the click wheel ribbon and it's GAME OVER. The clickwheel is impossible to find as a readily available spare part so pay close attention. This guide is so poorly written and doesn't emphasize enough avoiding ruining your Ipod with cable breakage that are soooo easy to happen if you're applying common repairing sense to this device designed to break if not fixed extremely carefully.

Translation (From Korean): "First of all, if you take the bottom plate off, there will be glue on the screws. You can remove it with tweezers or something and then unscrew the screws."

I add: Yes, @jongjun307 is right. VERY IMPORTANT to use a needle and tweezers to thoroughly remove the glue first from the screws, otherwise your screwdriver won't fit and you will apply force by natural reflex and ruin the screws. The screws are supposed to unscrew off very easily, without force. VERY important as well to have a fine enough screwdriver, otherwise...again...you'll ruin the screws.

You're not alone, it's a very common mistake, I just did it too. This guide is poorly written. Step 8 should between Step 4 and Step 5 precisely to avoid this. Once the cable is broken, it's game over. There's no replacing it.

@fredrodolf Step 8: ungluing the hold switch, which really is best done much earlier between step 4 & 5, to minimize the risk of breaking it aka the mistake @itronicsrepair is talking about.

Instead of that tool which is not fine enough, I strongly recommend using those plastic stiffeners used to keep the collars of shirts straight, OR cut out a pointy shape from the hard transparent molded plastic used in commercial packaging, that made a great GENTLE and efficient prying tool for these glued cables.

Make sure to ZOOM IN to get this right, this picture is not clear otherwise.

THIS SHOULD HAVE BEEN BETWEEN STEP 4 AND 5, no point ungluing the switch this late. The earlier you do this the better to avoid breaking the hold switch cable by puling the screen...like I did...and others here too apparently.

READ BEFORE DOING THIS STEP As soon you pull this up a bit, I recommend you do step 8 right away, which is ungluing the switch to free it and prevent either the hold switch or its cable from breaking in later steps. This is by far the biggest flaw of this guide. It is unfortunately not written for maximum damage minimisation. I broke the cable and the switch so please unglue the switch (as in step 8) so that when you pull the LCD screen you don't risk breaking the cable. If it breaks it's game over, so be careful!