Chosen Solution
Title pretty much sums it up. I soldered a wire to a cap near the pmic. I hooked the positive up and heard pop and saw a little puff of smoke. I had a diode reading on vcc main of 0.152, thats why i tried to inject voltage, but as soon as i did the voltage limiting on my dcps kicked in and voltage went to 0 while amps went to 5.16. The strange thing is that i went through each component and cap on main but didnt find the fried component. Any ideas on what happened, this is the first time ive injected voltage into a line so im unclear on safe voltages to find a short but not blow it off the board.
I am all for injecting power during troubleshooting but you also need to have a fused power protection that will blow before the item you are working on blows. I am not a phone technician so I would recommend a small fuse, say .5A, to start out and increase the size as you gain more experience or see that a 2A fuse still allows components to go up in smoke. If you have an adjustable power supply with current limiting that start that out at a low current potential and increase as needed for safety.
