I've been playing with a lot of old 8-bit micros & 8/16-bit games consoles recently and so a few days back I decided to dig out my NES.
It had lay unusued and gathering dust for nearly 25 years and was practically a human hazard when I unearthed it from it's resting place. There was dust, dirt & grime all over it and some weird green gunk inside the cartridge slot and over several pins.
Armed with isopropyl alcohol, cotton buds & kitchen towel, I set about cleaning it all up to a liveable standard, but didn't have a power supply nor any games in order to test it out.
Fast forward to today and the game I ordered to test it with arrived - Super Mario Bros (plus Duck Hunt, but I have neither the gun nor a CRT TV).
My Power Supply hadn't arrived yet, but thanks to sheer luck I happened to find in my drawer 1 of those multi voltage changing plugs which lacked any DC cable on the end. After a bit of cable splicing, I had this thing up and running and it's working great. 😎

Just waiting on various items that I've ordered now - a replacement front door/flap, a 2nd gamepad & a 500-in-1 Games Cartridge to fully put this thing through it's paces. In the meantime, I need to practise some Super Mario in glorious Composite Video & Mono Sound. 🤣