I rent a house. My laptop was ruined by rain water leaking in above the fireplace.?

I rent a house and recently during the wonderful downpours of rain , the water came running in around the beams above the fireplace. My lap top was soaked. It will not work. I have spoken to the Real Estate agent and am not happy with the response that my landlord evidentaly has Landlord Insurance but says Bad Luck. If I had left my Laptop outside in the rain , the damage would be my fault. But how does a leaking roof become my fault? Landlord says water ran in under the flashing around the chimney. Surely this is the landlords responsibility. What is Insurance for? Can anyone out there help me resolve this matter? What steps can I take to resolve this matter? Any help would be greatly appreciated. Thankyou.