Power book 180, power supply making tick tick noise

[Maccollector]

Hi all, I have recently purchased Powerbook 180 without a power supply. I found correct power supply, original apple power supply.Tested the voltage 7.5V but when I tested Amps, it was making tick tick noise before plugging it in the computer. Is this suffice to say i purchased a dead power supply or can I open 1 of these and potentially revive it?
Without correct power supply I have no way if finding out if the Powerbook I bought is functional. Now I have one of those multi plug power supply but this one is 65W, 18.5-20V. Is it safe to try that one or should I keep looking for correct one

 

[luRaichu]

Now I have one of those multi plug power supply but this one is 65W, 18.5-20V. Is it safe to try that one

No. Do not. You can only use 7.5 volts.

How did you measure amperage? tick tick sounds like you're shorting it and it's resetting
If the power supply measures 7.5 volts it should be good just plug it into the PowerBook

 

[Maccollector]

No. Do not. You can only use 7.5 volts.

How did you measure amperage? tick tick sounds like you're shorting it and it's resetting
If the power supply measures 7.5 volts it should be good just plug it into the PowerBook

I used multi meter with black probe on the outside and red on the inside.

 

[luRaichu]

Yeah uhh that's not how it's done! And not needed here!
You just need to know that the voltage is correct. It seems to be. So chop chop go ahead and plug it in. Drop your hesitations

 

[Maccollector]

Yeah uhh that's not how it's done! And not needed here!
You just need to know that the voltage is correct. It seems to be. So chop chop go ahead and plug it in. Drop your hesitations

I went and did that and power supply is making tick tick noise, no life out of the book. Time to open it and see how many stand offs are broken

 

[luRaichu]

This is where a benchtop power supply would come in handy...
Your profile says you're from Australia, so I would assume your PowerBook power supply would be different from the ones I've had here in the land of the free

 

[Maccollector]

This is where a benchtop power supply would come in handy...
Your profile says you're from Australia, so I would assume your PowerBook power supply would be different from the ones I've had here in the land of the free

yes it would be. I am guessing these is a short on the board. What I did not mention that battery leaked, however it did not seem to have transferred to the board ( yet to be seen)

 

[3lectr1cPPC]

The 100 series 2 amp power supplies have bad leaky caps 100% of the time. Bust it open, analyze the damage, and get recapping.

 

[Maccollector]

The 100 series 2 amp power supplies have bad leaky caps 100% of the time. Bust it open, analyze the damage, and get recapping.

Mine is 3A but again 100 series.

 

[Maccollector]

And laptop is open.. still has original appl 2.5’ 20MB drive. Now to see where is the power not going, considering my psu is ok.

 

[3lectr1cPPC]

Mine is 3A but again 100 series.

These aren’t as bad but still have cap issues. Have you for sure validated that it’s outputting 7.5V?

 

[Maccollector]

Where can i buy these??? This one was corroded legs broke off

 

[Maccollector]

These aren’t as bad but still have cap issues. Have you for sure validated that it’s outputting 7.5V?

Black probe on the outside , red inside the jack and I get 7.76v

Now these two babies get really hot but no voltage reaches them ...what are they

 

[Maccollector]

These aren’t as bad but still have cap issues. Have you for sure validated that it’s outputting 7.5V?

Black probe on the outside , red inside the jack and I get 7.76v

Now these two babies get really hot but no voltage reaches them ...what are rhey

 

[Maccollector]

Also this part is getting hot too , what is it ... Diode????