Multimeter TPSC1 voltage dc voltage to 5 v or so around 44 v (normal), observe R6513 / R6510 two flow resistance has been become angry phenomenon, reoccupy resistance measuring Q6511 / Q6512 two field-effect tube has a short circuit, replace the pipe after the boot is working properly. X5xservice manual download site
 X5xservice manual download site
Has been electricity aging, about three hours to appear automatically shut down, the red light intermittent blink twice, shut the power to open again after normal, testing each test point voltage, found some TPSC1 and TPVAD voltage fluctuations, for these two test points of the power circuit elements testing, found Q6453 B - E and B - C has been open, replace Q6453 sc1473 (2) has not appeared automatic shutdown after aging for two days.X5xservice manual download site