Update: Got the transistors. Decided to get a baseline before changing anything, and the results had deteriorated. Seems that the console is very finicky - sometimes boots reasonably well, and at other times it seems to take a large number of tries. Can't say it depends on the temperature, because I had it boot up after 2 tries when it had been off overnight. Other times, it seems to want to get warm before it boots.
Anyway, I removed the QSB and installed the transistors and there doesn't seem to be any significant difference in the boot results. I left the transistors in because there was no advantage in changing back to the QSB.
From my observations, I would definitely say that a final post of 6C is a solid failure. A final post of 6F sometimes fails, and sometimes succeeds. Sometimes, the codes never go beyond 2E, and the console shuts down after 6 boot attempts.Since there is no indication of whether the console is hung or still attempting to boot (except when the 3 red leds blink) when the console is closed up, I added a 1K resistor and an LED to the RF board and connected it to R1 (1K) on the R-Jtag board. The cathode of the LED is soldered to ground on the RF board. This gives a good indication when the R-Jtag is glitching.
None of my previous questions have been answered, but I will ask some more. Sometimes the R-Jtag board hangs with the glitch led on solid green. Is this a bug in the R-Jtag board? Or, is it perhaps defective? I tried measuring the voltage on point D on the R-Jtag board, but when I touch it with my meter's probe, it causes the led to flash. Is this normal?
If I don't get any further ahead, I will close up the console and return it to my nephew. At present, it can take up to 10 minutes of trying, pressing the power button every time it hangs or gives the RROD before it boots.
I again tried the original nand image and it boots rock solid in about 9 seconds, each and every time.
