I think I accidentally connect a 9V battery pi to the pi and it flashed and turned off. I think I might burned the pi by doing that because I'm not able to boot it any more. So now if I connect the normal power cord to the pi, both red and green led light up but no flashing. I tried to refreshing the os on the sd card and tried other working sd card as well, same problem stays.

Anyone has any suggestions of what to do? Is there anyway to fix the burned pi?

Thank you.

there might be a solution if you're good in electronics , try to identify the burned component ( probably gonna be a power regulator, might be other ) and replace it

Poor Pi.  8-(  Sounds like it needs surgery.

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