Grandstand Cosmic Invader 1980's Game eBay 'Untested' Repair

Hi Folks,
Here's a very grubby but rare Cosmic Invader from Grandstand (1981). It doesn't power on, and it's filthy - plus there's a huge burn mark to the front.
Join me as I take a closer look at the unit, strip it down and give it the love it so desperately needs!
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Thanks so much for watching - see you soon!
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Thanks again!