It lacks lots of steps like removing the screw behind the dial for the eye-visor, before opening, there's also a screw behind the thumb grip to remove before opening. There's also 4 little cables on the top left on the motherboard to unsold and also one screw om the left, so we can remove the motherboard and detach the connector of the LCD. Open carefully by the top of the mother board and detach the LCD connector by lifting gently the little black bar at the back (it's not the same connector as on the other side, if you pull the white bar it breaks)
ha! and forget changing just the SD card slot. It's 20$ for a good one, and it's just hard to replace for anyone not used to do it… buy a new motherboard it's quite cheap on eBay for an original one, changing just the SD is just too risky for a beginner.