斯里兰卡采购需求：无人机、遥控车、益智玩具、积木、游戏桌、国际象棋

I am having some trouble with my drone, specifically with the front right motor. It doesn't seem to be functioning as it should, and I'm looking for assistance in diagnosing and fixing the issue. Could you please provide information on the potential causes of this problem? Also, if you have any recommended solutions or replacement parts, I would really appreciate your guidance. Looking forward to your prompt response!