hello, if there was a lot of dust inside you may have fried something on the motherboard ,from it overy heating ,i would try removing the ram from the laptop ,unplug from power and remove the battery first ,if it has has 2 chips then put one back in and try turning it back on again .it may or may not help .
as for files on the harddrive they will likely be fine as long as the harddrive didnt die .you would do this by removing the harddrive and connecting ( either by connecting it inside a desktop computer or using a usb harddrive connter cable ,)it to anther computer to get at the files
caperjack 875 I hate 20 Questions Team Colleague
caperjack 875 I hate 20 Questions Team Colleague
caperjack 875 I hate 20 Questions Team Colleague
caperjack 875 I hate 20 Questions Team Colleague
caperjack 875 I hate 20 Questions Team Colleague
caperjack 875 I hate 20 Questions Team Colleague
caperjack 875 I hate 20 Questions Team Colleague