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Help Samsung Galaxy Gio S5660

My Samsung GIO had Android firmware 2.3.3. Tried to downgrade to firmware version 2.2.1 with Odin_Multi_Downloader_v4.42 .
During the process my phone is turned off but didn't turned on again.

Now, I have tried many times but it does not want to be turned on in any mode - in normal or in Recovery, or in the Download mode.

Odin finds it but when I try to repeat the process it hangs on the phrase
startup connection

What will advise? How to reanimate it?
 
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