Do we really want to start a discussion about solder with or without lead in it? Lead was always better for solid connections. You can be happy to still can use it for private! Many malfunctions on commercial devices are just caused by lead free solder. You just should not eat it and maybe wash your...

This part breakes on some shipsets. Some for me: just try to use the rest of the remaing plastic bar to lock your cable. Should work fine, this is just a mwchanical support.

I do not see any battery on your picture! There is the pcb with a hole in the middle and a potted piece which holds just your game rom inside it. There are solder pads for a small 10uF capacitor but was never soldered to it. I do not know what a capacitor is here disignated for. Storing game data wo...

Try ebay. Maybe in different countries. I found often so.e out there.

You decision is fully fine! No brand is nesessary to prefer, just maybe silicone wire since it is much more easy to solder for beginners. I suggest all signal wires to be twisted to its pair: USB, Audio and Video. Button wires and power do not nead to have this twisting.

It will jist not work. Reason: two totally different protocols.

Hi,

Since Yaya or how he was called here is not available anymore with his decals: is anyone else able and willing to produce and sell some of these nice decals looking simelar to the original ones?

Are you sure about your PIs IP adress: usually I see something like 192.168.xxx.xxx that is provided from router DHCP to the pi.

我不知道你在说什么

You should try to reload the raspberry image.
Or: use another SD card
Or: did you changed any overclocking settings inside of config.txt?
This could be at worst a faulty raspberry!