Tea Break Fix - Faulty Old ROBIN MULTIMETER Repair

Hi, in this Tea Break Fix I look at my old Robin Multimeter which I have had since the 1990s. It used to work but when I went to use it recently, it showed no signs of life, even with new batteries. Can it be fixed?
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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.