Sony Electronics Inc. has announced a recall of about 233,000 Sony VAIO 233000 notebook computers after it received 30 reports of the deformed keyboards and casing owing to overheating. This overheating poses a burn hazard in case the heated affected part is touched. None of the 30 reports indicated of any injuries as a result of this overheating. The overheating is caused by the malfunction of internal cooling system and protection circuits.