Sometimes disassemblers forget that the first time they disassembled the item it didn’t want to give up easily: I didn’t like the forces I was having to apply at all, so I switched to two plastic prying tools per “corner” and one in-between them (total 5, you could use plectrums…) before I was happy the the forces were low enough not to break anything.
Also, on my keyboard there are metal latches under the keyboard. To remove the keyboard it needs to be slid towards the screen a few mm before you can lift it. When reassembling do the reverse, engaging the latches, or the keyboard will not stay down properly.
Getting the cable back i was tricky. in the end I almost had the keyboard vertical to east the bend on the connector as I pushed it back in gently - then it finally went in. When you push the retaining flap back down the white line on the ribbon cable should just be showing - then you have it in properly.
