Xbox Will Not Power On - Microsoft Xbox Repair Manual

1.6 Xbox will not power on

I found this to be the case after working on a failed mod board. I was in the process of repairing
traces and booted it many times without issue then suddenly without warning the box would
suddenly not respond to power or eject buttons.
I found the collector of the transistor (circled in blue) to be producing unstable voltage of less
than 3v. This confirmed the issue the board was having, I purchased some of the MMBT3906LT1
transistors and found replacing it resolved the power on issue.
To install I found a good set of tweezers essential for positioning it and sharp knife for removal.
With the tip of the knife gently pry up on the single conductor side, heat the side with the single
conductor and bend it upwards then repeat on the other side with the dual contacts. Installing was
fairly easy as well once it is properly positioned, solder the single contact at a low temperature
and continue on to the side with dual contacts once positioned properly.
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