70's LED calculator repair. Texas Instruments Datamath II. Can we bring it back to life?

70's LED calculator repair. Texas Instruments Datamath II. Can we bring it back to life? Let's get it into the workshop and investigate why the classic calculator no longer works. Is the eBay seller right that it's probably a battery compartment issue only? Welcome to the Retro Tech Repair Shop, where we invite you to join us in our journey of investigating, repairing & playing with obsolete technology, games and nostalgic favourites of the past. Did you have a favourite toy or piece of tech and always wondered how it worked? Do you want to learn how to repair stuff, maybe a beloved childhood toy that you would like to get working again? Kids always bringing you their broken items to fix. Maybe you want a stroll down memory lane? If so, you came to the right place! We will be purchasing items from eBay that are listed as "for spares or repair" or "not working", to see if we can bring them back from the plight of impending landfill or recycling. Let us not allow these gems to be lost forever. I am an electrical engineer who has accumulated some associated skills over the years and now would like to share my hobby with you. I hope you find it interesting, informative and fun. Please subscribe and comment so we can fix stuff together. www.mendstuff.com #vintage #calculator #datamath #technology #repair #workshop #retrotech #vintagetech #electronics #soldering #70s #testing #refurbishment #nostalgic #oldtech #forrepair #notworking #forspares #70stech #fixit #howtorepair #repairneeded #brokentech #fixstuff #mend #mendstuff #broken #electronics #battereries