I've started to hear a slight buzzing sound from one of my fans and believe that it could be a worn out bearing. I've looked for replacements parts but have only found the fans included with the heatsink for this particular model. Would a fan from another model, such as the VN7-593G, be compatible as a replacement part? I know that the part numbers are slightly different; mine is a Sunon EG75070S1-C350-S9C and the 593G fans I've found are Sunon EG750701-C090-S9C. I was hoping that they were physically the same part and that the part number differences were due to being used in different laptop models. Thanks for the help!