Did you replace the plugs and header pins on J101 and J102?
I know others may have different experiences, however i have repaired many reset issues, and can only recall one where the Bridge itself was the fault. Sometimes it was the solder connections or traces going to the bridge or cap, but most times it has been the connectors (either pins or plugs).
Also, have you checked the 5V at the MPU? TZ has a 'Z' connector which is pretty prone to failure over time and can cause voltage drop between the power driver and MPU boards.
Personally, if i have removed the power driver board, i tend to do the modification (i accept some people will call this a hack) of putting a 22 ohm resistor between the 5V regulator and ground. The reason for this, is that the 5V regulators from the factory can have too low an output (i think they can be classed as a 5V regulator, even if they only put out 4.8V), so this is a way of bumping the output up to normally around 5.03V.
In all of my machines, once i have done this mod, replaced J101 and J102 plugs and header pins, i have not had reset issues since
