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I have Honda Accord 2018 Touring, my brother mistakenly reversed the connections to the battery terminals and now the the Navigation display screen won't power on.photo of dashboard

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    What does "turned the battery terminals" mean? If the car starts and runs, the battery and connections are fine. A fuse may be blown.
    – F Dryer
    Oct 1 at 20:39
  • I mean he connected the negative to positive and the other way round. I checked all the fuse and it seems none of them is blown.
    – Matthew
    Oct 1 at 23:22
  • You checked all three fuse boxes, right? Two under the hood and one in the passenger compartment to the left of the driver's knees?
    – MTA
    Oct 1 at 23:54
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    1-Again. Does the car start up or not? 2-In addition to three fuse panels, does the radio have a built-in fuse?
    – F Dryer
    Oct 2 at 0:25

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