Shocking Angle Grinder Restoration

"Be careful this tool is shocking!!!", the seller said, it shocked him during testing. I think the blade is broken during they were shocking. So I decided to buy it for my restoration project. After I did a restoration I found a problem in tools. Credit: Gear Show - https://www.youtube.com/channel/UCWKqh_3cb6cDiz2ICWc-5Sw