Is it permissible to buy a new computer with some used parts instead of repairing an old computer, knowing that the cost of repairing the old computer is greater than the price of the new one that was bought?

The ruling concerning an individual dealing with an institution is that of an agent, and he is not permitted to act outside the scope of the agency. Therefore, he must adhere to the computer maintenance specified by the institution. If he believes that purchasing a new computer is better, he must refer back to the institution and seek their permission. If the agent exceeds the limits of the agency and purchases something other than what he was authorized for, his action is dependent on the approval of his principal (the employer).

Jurists have differed regarding the ruling on a purchase if the agent violates the terms of his agency: - The Hanafis held that the purchase is not binding on the principal and becomes binding on the agent because he violated his instruction. - The Malikis held that the principal has the choice between accepting or rejecting; if he rejects, the purchase falls to the agent, and he must pay the price from his own money.