Well, the 520c died.

[Carboy7]

Something went boom. Now the 520c is dead. Won't boot. The disk spins up, but other then that, nothing. Ugh. (Is it caps? Maybe...)

 

[techknight]

May it rest in piece

You need to measure the output voltage from the power supply, the blackbird power supplies have known leaking and failing capacitors. I had a blackbird back in the turn of the millennium and the caps were already bad. 

 

[Carboy7]

Ok, something is wrong. It booted again from a hard start...

And made it to the desktop. All the way. There isn't any indication that anything was wrong.

What the heck is going on inside this computer?

 

[techknight]

You need to measure the output voltage from the power supply, the blackbird power supplies have known leaking and failing capacitors. I had a blackbird back in the turn of the millennium and the caps were already bad.

Unplug the power cord from the brick itself and give it a sniff. A good one. Bet you smell fishy fishy. 

The other thing, 2.5" SCSI HDDs are KNOWN for spontaneously failing. 

 

[Carboy7]

Didn't smell like fish. only hot plasticky smell. Also, what's the power supply voltage?

 

[techknight]

I dont remember off the top of my head, but I believe its labled on the power supply itself. 

 

[Carboy7]

I got 16 volts on my meter. (EDIT: that's good.) And the powerbook booted again.

 

[Elfen]

Sounds like a Power Supply problem to me. Time to scratch your head and figure out how to open that power brick and replace those darn caps.

 

[Carboy7]

It looks easy to crack, but who really knows? Not me.

 

[Elfen]

I know the Those Bricks on a Leash have screws on the 5x0 Powerbooks but just in case they are also sealed shut, look at this thread for an idea:

https://68kmla.org/forums/index.php?/topic/26586-opening-a-powerbook-power-brick-revisited/

 

[techknight]

They are sealed as well as screws depending on rev. I remember having to take a flat blade and hammer to it back in 2000 or so.

It was my SimTower machine of the time.