I've acquired a Powerbook Duo 210 for my collection.
It ran perfectly for about 3 minutes from the original Apple power supply when without warning, my house fusebox tripped. I think the PSU had shorted but when I tried it a second time, the Duo bonged followed by a blank screen and a loud hissing sound at which point I disconnected it all immediately. There was no battery in the unit.
Any idea what's up? There 7 large caps on the motherboard but none of them looked to have leaked. I can't see any obvious blown components or damage. Could it be a power regulator? I've replaced many bad caps at this point but I've never encountered a hiss. It's definitely not coming from the speaker either.
If the PSU had blown, how was it able to boot the machine a second time? And why would the startup check succeed?
Any help appreciated.
It ran perfectly for about 3 minutes from the original Apple power supply when without warning, my house fusebox tripped. I think the PSU had shorted but when I tried it a second time, the Duo bonged followed by a blank screen and a loud hissing sound at which point I disconnected it all immediately. There was no battery in the unit.
Any idea what's up? There 7 large caps on the motherboard but none of them looked to have leaked. I can't see any obvious blown components or damage. Could it be a power regulator? I've replaced many bad caps at this point but I've never encountered a hiss. It's definitely not coming from the speaker either.
If the PSU had blown, how was it able to boot the machine a second time? And why would the startup check succeed?
Any help appreciated.