I have a sharp xr-10x projector. The replace lamp light came on but the lamp still works. Understanding the inevitable I order a generic equivalent lamp because that is all that is available. Problem is every time I go to replace old lamp with new one, the new lamp wont work and replace lamp light is still on. So I put old lamp in and it still works. I tried three different vendors, three different lamps and none will work. Can you help?