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Model A1311 / Mid 2010 / 3.06 & 3.2 GHz Core i3 or 3.6 GHz Core i5 Processor

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SSD Won’t boot once installed only externally… HELP

SSD (Lexar SATA 6Gb) Won’t boot once installed Internally screen goes black then the prohibition sign appears but it will boot externally while the original HDD is installed anybody have a solution?

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It’s likely this SSD is a fixed SATA III (6.0 Gbps) drive not the needed SATA II (3.0 Gbps) this system requires. While there are Auto sense drives which will drop down it’s I/O speed to match the systems. I don’t believe that’s the case here. So why does it work externally? The SATA to USB case can force the speed as the standard was updated after this system was designed.

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Kapp God crwdns2934231:0crwdne2934231:0
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