I have an old HP Pavilion n5125 that I dropped and it seems to have killed the cooling fan. I say seems to because it was making a grinding/scraping noise and then stopping completely a short time after turning the laptop on. I took the fan out, clean, and checked it. Before putting it back in, I turned the laptop on and it worked fine, no more grinding noise and it didn't stop. Thinking I had solved the problem, I put it back together. The grinding/scraping noise was gone but it still stopped spinning after about 15 seconds. Any ideas on why it would stop once it was back in the case? Is there somewhere to buy replacement fans for old laptops? Thanks.