I have three 3400 motherboards exhibiting odd problems. Each of the three behaves the same: It can boot, it gets to the flashing disk, and goes no further. Oddly enough, neither the trackpad, nor an external mouse can get the cursor to move, but it accepts keyboard commands, such as power on, and PRAM zap. I havnt tried Open Firmware yet because I forgot the command.

I replaced the PMU chip on one with an identical part # PMU from a 5300, but nothing changes (same as it was before).

Anyone got any ideas ? I am particularly baffled that the keyboard input works while a mouse does not.

Mad Dog

I tried booting from an external CD ROM. This time, it doesnt even get to the flashing disk. The cursor shows up, but otherwise it is stuck on the grey screen.


Puzzling.

Mad Dog

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