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post #21 of 24 Old 04-17-2013
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Re: Wanted- Otto, Dead or Alive

I'd measure and record the voltages on the power pins of the ICs, plus sides of electrolytic caps, and outputs of any 3 pin voltage regulators. Also I would feel each transistor, IC and cap noting any one of them that felt warm/hot.
Let it sit, power on until the malfunction occurs then go back and measure the voltages and feel the parts.
The other thought is if there is a single chip microprocessor, it may have a problem
in reading its program when the temperature rises, it reads a bad instruction, program
goes off into the weeds and doesn't recover until power cycled and cooled down.
If you go the freeze-it troubleshooting route, a short blast is all that is needed. Don't encase the components in a block of ice. You wouldn't have a refrigerator around where you could run otto to see if the malfunction occurs at a lower ambient temperature?

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post #22 of 24 Old 04-17-2013 Thread Starter
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Re: Wanted- Otto, Dead or Alive

I thought about that. I could pre-chill him, and see what happens after I apply power, but I'm not putting a 12v battery in my fridge.

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post #23 of 24 Old 04-17-2013
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Re: Wanted- Otto, Dead or Alive

Quote:
Originally Posted by BubbleheadMd View Post
I thought about that. I could pre-chill him, and see what happens after I apply power, but I'm not putting a 12v battery in my fridge.
Lazy.



You could always go with something like this: General Brand A23 12V Alkaline Battery (2 Pack) B&H Photo Video
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post #24 of 24 Old 04-18-2013
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Re: Wanted- Otto, Dead or Alive

You do realise that you don't actually have to put the battery in the fridge right? Just the wires that go to the unit, the fridge seal should be able to cope with that although that does depend on which seal it has. This one works fine

but this one can be a little touchy

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