I am working on a Transport ZX by micron pc and I got a bit of a headscratcher.
When I go to boot the machine, and it's plugged into the wall, it just sits there after the post (blank screen). However, as soon as I remove the power supply, and it starts to run on Battery, it starts working. It never has the problem when booting off of the battery. And it will run after the boot and charge with the power supply inserted AFTER that POST and boot part.
I have replaced the DC -> DC board where the power supply plugs in, as well as the battery board (battery plugs into it and then it goes to the logic board) and it still does it.
I don't have another logic board for this machine, and can't get one easily. So i gotta figure something out.
I had to flash the firmware up from the P-II model to the P-/// model so I can drop the Pentium 3 600Mhz CPU into it (it's on it's own daughter board)
It has something to do with the power, but I can *try* to reflash the BIOS. I will try that, but does anyone have suggestions as to what I can do?