【Solution of keys don't work】If some keys don't work after install ,You can try to reconnect the ribbon cable in case bad connected ,pls use a dry cloth to wipe metal head of the connect ribbon,then try to connect about few times,many customer solve this problem after did this.
Of course! Please provide the lines or text you'd like me to modify, and I'll help you rephrase them while keeping the original meaning intact.
【Compatible Models】Compatible with Dell Latitude E5550 E5570 M7510 M7720 M7520 M5520 Series Laptop