A Job Lot of Faulty SNES Game Consoles from eBay - Can I Fix Them?

Hi, here we have 3 broken Super Nintendo Entertainment Systems purchased from eBay for £50. They have a mixture of faults such as no power, black screen of death and one plays the game but doesn't show the display properly.
How many can be fixed, none? 1,2 or 3....let's find out.
Merch is here!!!!! www.puddlt.com...
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If you have an interesting 'non returnable' item for a 'trying to fix' video then my PO box is as follows. Please only use if you are from the UK and using Royal Mail.
PO Box 2597
WATFORD
WD18 1HT
UK
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.