Thanks - I've just tried shorting the AC terminal and the top of the battery with a paper clip - it didn't have any effect. I've just noticed that there seems to be a screw missing which looks like it should be holding the battery in place, which I guess explains the problem? https://photos.app.goo.gl/YSyBzshMWdXXfkJB7 Can this screw feasibly be replaced by a layperson? If not, what would I usually expect a jeweller to charge for this?
I've just retrieved my old Seiko H601 alarm chronograph from my bedside drawer after many years. I replaced the battery (and checked the new battery with a multi-tester), but the watch is not working - no digital display and no movement from the second hand. I can move the hands using the button. Any ideas for how I can revive it? There's a photo of the internals of the watch here: H601 internals