A GPS navigation device with a large touchscreen.

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Power cable hooked positive to negative, now does not power up

I made an adapter power cable, but I wired it backwards positive to negative. Now with a correct wired power cable the green light lights, but the unit will not power up when pushing the on/off switch. What component is most likely damaged and can I replace the damaged part?

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Try just holding the power button for 15 seconds. This is supposed to reset it. I can't find a schematic, so I can't pinpoint the most likely cause, but look for something burnt if holding the power button doesn't work.

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After my GPS sat for one day, pushing the power button at first did nothing. I hooked it up to the corrected power source and again pushed the power button and held it for 15 seconds. After just a few seconds the GPS came on normally. Thanks so much for your help. Frank

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Glad to help! Thanks for telling us how it went. So many times I wonder if people got their devices working.

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Keep the polarity in electrical connections positive to positive and negative to negative when utilizing dc power. Connect hot to hot and negative to negative while working with Ac voltage

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fsandtb will be eternally grateful.
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