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Discussion Starter · #1 ·
Good morning,

I just bought the P-81 ACRD OEM Upgrade Multimedia Navigation System from amazon and installed yesterday. However, when I started my system it shows the following error message: ”booting checksum error, please emergency upgrade”. Please let me know how to solve this problem. Thanks!
 

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Try getting someone else's software and replacing it in the SD card?
I can upload mine if you want to try that, let me know
 

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will do so once i get home. cant find it on my macbook anymore, think i deleted it.
 
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