也门采购需求：1111,sk-p001、sk-p002、sk-p003、sk-p006,LED手术灯，医用无影灯

I'm reaching out because I'm experiencing an issue with the installation of the mobile lamp. Specifically, the arm is not functioning properly; it won't move up or down as intended. This is creating some challenges for me in using the lamp effectively, and I could really use some guidance on how to resolve this issue. Could you provide some assistance, such as troubleshooting tips or possible solutions? If there are any specific adjustments or checks I should make, please let me know. I'm eager to get this sorted out so I can fully utilize the lamp's features. Thanks for your help!