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It was fairly simple.
You'll need a small Phillips screwdriver to remove the two screws at the bottom, then you just have to pull the plastic back cover. It can get tricky around the microSD card tray and there is nothing to hold the power button in its place, so it will fall.
I would say that you shouldn't be afraid of messing with the board. Mine wasn't working for nothing, so I treated it very badly while trying to make it boot. Some things I did:
- Pressing the chips against the board (sometimes I even forgot to disconnect the battery while doing this)
- Disconnecting and reconnecting most flat cables around the board
- Using my house key to perform the contact that the power button uses to do internally and pass it over some of the power ralis on the board.
And only after all this I got it working again with the "massage"...
On the other hand, I don't know if you can find the exact same battery to replace the old one or how a slightly different battery will behave there.
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