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Pismo random power problems...

Message #1 - Posted 2005/04/13 - eschelj

Hi all,

A odd thing has started happening with my Pismo. I normally use it with the clam shell closed and external monitor/keyboard/mouse. No issues when using it this way.

The other night, I was moving the Pismo around (basically sliding it a few inches) when I heard the hard drive "beep" (same noise it would make when shutting down the computer), and then the hard drive spun down. The mointor was still on, but all usb functions were killed. After a few seconds (once I stopped moving the laptop) I heard the hard drive spin back up, but the system was totally frozen.

I have been able to reproduce this problem whenever I gently lift on the front corner, or click the mouse "hard". Gentle clicks don't seem to matter, but with enough pressure (not extreme; I've since done it accidentally with normal clicking) the same problems occur.

My battery has been dead for years and I have the weight-saving module in, so I don't think it is a loose battery connection. What is under the trackpad that would have to do with system power? My AC connection seems firm, so I don't think that is the problem.

Could the track pad connection be loose and killing power to the whole system? The LCD display also goes off when the hard drive spins down.

Ideas?

Thanks

Message #2 - Posted 2005/04/14 - matt neuburg

<eschelj wrote:

Hi all,

A odd thing has started happening with my Pismo. I normally use it with the clam shell closed and external monitor/keyboard/mouse. No issues when using it this way.

The other night, I was moving the Pismo around (basically sliding it a few inches) when I heard the hard drive "beep" (same noise it would make when shutting down the computer), and then the hard drive spun down. The mointor was still on, but all usb functions were killed. After a few seconds (once I stopped moving the laptop) I heard the hard drive spin back up, but the system was totally frozen.

I have been able to reproduce this problem whenever I gently lift on the front corner, or click the mouse "hard". Gentle clicks don't seem to matter, but with enough pressure (not extreme; I've since done it accidentally with normal clicking) the same problems occur.

My battery has been dead for years and I have the weight-saving module in, so I don't think it is a loose battery connection. What is under the trackpad that would have to do with system power?

The power supply card. It is directly under the center front of the top-case (where the trackpad and clicker are). In fact, the clicker pushes a button that is located on the power supply card.

My AC connection
seems firm, so I don't think that is the problem.

Nevertheless, that could be it. The wires inside the power adaptor are surprising thin and can easily become worn. m.

matt neuburg, phd = matt@tidbits.com, http://www.tidbits.com/matt/ AppleScript: The Definitive Guide
http://www.amazon.com/exec/obidos/ASIN/0596005571/somethingsbymatt Read TidBITS! It's free and smart. http://www.tidbits.com

Message #3 - Posted 2005/04/14 - DaveC

On Wed, 13 Apr 2005 14:50:43 -0700, eschelj@gmail.com wrote (in a previous article):

I have been able to reproduce this problem whenever I gently lift on the front corner, or click the mouse "hard". Gentle clicks don't seem to matter, but with enough pressure (not extreme; I've since done it accidentally with normal clicking) the same problems occur.

There was a problem with the Pismo (that happened to my Pismo) that sounds very much like what you're experiencing. It, too, was caused when lifting the computer by holding the computer by the palm rests (on either side of the track pad).

I believe the cause was the processor card coming loose in its connector.

I'd check the power connector, first, (these are notorious for causing power outages) then open up the lower case (or have someone qualified do this for you) and reseat the power supply card. While in there, I'd reseat the processor card.

FWIW, this hasn't recurred in many years since I eliminated the trouble.

Good luck,

Please, no "Go Google this" replies. I wouldn't ask a question here if I hadn't done that already.

DaveC
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