"having keyboard function issues"に関する回答The accident usually was caused by the bad circuit in the bottom board. But you can try to clean the connetor of the keyboard firstly, if it can't solve the problem, you need to replace the keyboard. You may find the replacement keyboard on http://battery-adapter.com/
"Can I replace cooling fan with other fan model?"に関する回答You need to replace the fan with the same model. But I also suggest you to clean the fan firstly, maybe that will solve the problem.
"Best keyboard cleaning method and can I buy replacement keys?"に関する回答Since your keyboard has been used for a long time, based on this condition, I suggest you purchase a new keyboard, not single key. http://battery-adapter.com/advanced_search_result.php?k...