iMac 21" 2013
no power.
no lights on MLB
Tried known good PSU same result.
Found that pp3v3_S5 has a dead short to ground.
Seems to be on pin 1 of L7610 (0v diode mode)
Pin 2 of L7610 is 0.125v
Tried injecting some voltage got to 3amp @ 0.7volts
Not done many iMac boards so am unsure as to how much current i can put in this rail, or if there are any common issues on these
Thanks again.
no power.
no lights on MLB
Tried known good PSU same result.
Found that pp3v3_S5 has a dead short to ground.
Seems to be on pin 1 of L7610 (0v diode mode)
Pin 2 of L7610 is 0.125v
Tried injecting some voltage got to 3amp @ 0.7volts
Not done many iMac boards so am unsure as to how much current i can put in this rail, or if there are any common issues on these
Thanks again.