according to the website given below it's possible to resurrect any "dead" sigmatel based player. as you may know Z5 sports SigmaTEL SMTP 3660 chip. Now if any one with a working player would be so kind to extract their firmware (no harm will be done to the layer ;-)) we'll all be able to unbrick our players. yes, mine is bricked again. Since there is also a Z5F with an fm radio, two versions of the firmware are required. Please, please, please have a look here.