No Return / No Exchange Policy.Please check model Number and match with your Product.Generic and Proper Power Button.Super Quality.Every product cross check Before Shipping.Compatible withLenovo SL410 SL410K, L412, L420, L410 L421 DA0GC2YB8B0DAGC9FMB8D1 DAGC9FYB8C1DAOGC2YB8BO35GC2LB000035GC9LB00003..