Broken BOP IT EXTREME 2 Playing FAST!!! WHY???

Here we have a very popular skill game called Bop It Extreme 2 but this one is faulty. I purchased it from eBay because the description said it was playing fast and has battery corrosion. Why has the fast speech happened? Why has battery corrosion caused the game to speed up. Let's see why and if it can be fixed.

Merch is here!!!!! https://www.puddlt.com/my-mate-vince

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Remember that this is just for entertainment and I am not an expert in these repairs. The processes in the video may not be the best way, the correct way or the safest way to fix these things. I do love fault finding and trying to fix broken things, so I hope that comes across in this 'Trying to FIX' series. Many thanks, Vince.