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Can any1help me please.I have been trying all day to upgrade my hitachi 47 from 1.4 to 1.5.I cant get it to flash in jf.my checksum is 0x000000000 if this helps.original bin file failed MD5 hash check.master checksum is set restore drive to stock first.these are a few errors on jf.
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Well if the MD5 hash check failed that means you made a bad backup of your drive and you're possibly screwed.
You need to extract your key from the firmware installed on your xbox360 and inject it to firmware upgrade i believe.

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