Casio BP-100

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I recently changed the battery. The alarms or chimes no longer work, nor do the beeps during mode changes. All of the contact springs are intact. Mt. Olympus clock shop told me it could be a worn-out contact sticker on the inside of the bck case. Any suggestions you all may have to get this stunner beeping again?

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There are 2 videos on youtube about repairs. Its from the 90s so no parts around just donors 

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Did you connect the + of the battery with the AC pad after you connected the new battery? Also check that the case back is installed the right way up.