Good luck with it - hope you get her going again! I've had mostly good luck with my Pismos - the one time I thought I had fried one by stupidly not remembering to pull the battery when adding RAM, and even then, it was OK in the end.
From the thread, it looks like you have really reset the PMU several times, right? Both 1400s and the Lombard/Pismos seem to sometimes take several sequential tries, with a loooooong push on the reset, for the reset to work.
I've done one full surgery to get down to the mainboard level. It takes time, but there is nothing too insurmountable. Use the available online directions and go slow. Getting out the inverter board is the trickiest part.
From the thread, it looks like you have really reset the PMU several times, right? Both 1400s and the Lombard/Pismos seem to sometimes take several sequential tries, with a loooooong push on the reset, for the reset to work.
I've done one full surgery to get down to the mainboard level. It takes time, but there is nothing too insurmountable. Use the available online directions and go slow. Getting out the inverter board is the trickiest part.