AN-900

Hi,
Recently I visited my office in xxx. I was excited to see the machine in my office. However, I found that the instrument needs some corrective measures. I have following queries in regards to the AN-900 machine that we are using
1. The machine hasn't been used from last 4 years. What parts do I need to change?
2. Is this machine a factory calibrated one or do I need to calibrate manually?
3. Quickly I tried to analyse Amyloe Value of one RICE sample which we already have the result of around 24%... For the same sample, the machine shows 1%? Looks like something has gone terribly wrong
4. Can I connect this machine to the Computer? If Yes, Please let me know the process..

Let me see how best you handle these queries
Best Regards,
AJ