crwdns2935425:01crwdne2935425:0
crwdns2931653:01crwdne2931653:0
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Locate the power button (solder locations circled in orange).
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Locate the mode button (solder locations circled in red).
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Both buttons are attached by four soldered pins each.
crwdns2944171:0crwdnd2944171:0crwdnd2944171:0crwdnd2944171:0crwdne2944171:0