crwdns2933423:0crwdne2933423:0
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crwdns2934241:0crwdne2934241:0 oldnwstf

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As far I am concerned, these keyboards are unrepairable when they fail.

Well at least you can still change the batteries in those models, the newer ones have a soldered lithium battery.

Check this guide, it might provide some help:

[guide|5239]

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open