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Model M4753 / 233, 250, 266, 292, or 300 MHz G3 processor

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Why does this mac keep going to sleep?

I have been given a Wallstreet G3 Laptop, which boots up fine, however when the desktop appears on the screen the mac instantly goes to sleep and wont wake up, I have tried the obvious, ie rebooting with extentions off. Any idea why it keeps doing this?

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Here's a thought, the hinges on this mac have gone, would replacing the hinges on the mac in anyway effect the going to sleep issue? ie would broken hinges disrupt the sleep mechanism or the reed switch?

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Here is the link to the teardown--I will post a parts link shortly. Ralph

PowerBook G3 Wallstreet Repair

Here's the link for the part. Ralph

http://cgi.ebay.com/PowerBook-G3-Wallstr...

Also check out this article for another possibility. Ralph

http://www.techedgeezine.com/cart_mac_pb...

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I think the item to the far left may be the sleep switch--its about where the brass shim would be. You will have to look at it to see if it can be removed. + for an interesting question. Ralph

do you mean next to the two silver screws?

+ nice research

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Are you sure about the "sleep" mode ?

or does it switch off ?

or the screen switches to black (the light goes out) ??

did you try to boot it from the optical drive ??

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It is definately asleep the green light flashes on and off, then if you hit the power button you get a strange clicking sound. Also the hinges have gone on this mac, does anyone have any lying around they want to get rid of? Trying to save this mac so it can be used by my little brother, I HATE to chuck stuff away.

I understand that you don't want to throw it away.

what happens when you start it from the optical drive ?

where comes the clicking from ? hdd or cd ?

sorr - i have no hinges for this machine - the problem is, that they will probably a fortune (like for the tiBook - up to 50 bucks per side)

Right I have ordered a new hinge set so when that arrives will open the beast up and attempt to fix it in one go! Will let you know what happens!

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There's a switch in the hinge that tells the machine when the lid is down. When that switch closes, the machine goes into sleep mode. The Wallstreet dissipates a lot of its heat through the keyboard, so this is a self-preservation feature - running it with the lid down would fry the boards. If the switch is stuck (which could well be the case given the broken hinges), then there'd be a constant "lid is closed" signal, which would produce exactly this behavior.

Disconnect the power, remove the battery, and carefully open the lower case to get to the hinges (I believe there's a teardown photo set for the Wallstreet around here somewhere). Locate the switch and check it with a multimeter to see if it's working. If it's stuck, you could just disconnect it and tell your little brother to avoid closing the lid or covering the keyboard.

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+ good answer

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In your troubleshooting, did you happen to reset the PMU? It controls the sleep functions. Just a thought.

PowerBook G3 Series (M4753)

1. If the computer is on, turn it off.

2. Simultaneously press Shift-Fn (function)-Ctrl (control)-Power.

3. Wait 5 seconds.

4. Press the Power button to restart the PowerBook computer.

A hard reset might work if this doesn't. Remove the battery, then hold down the power button for 30 seconds. Wait five seconds. Replace the battery and push the power button.

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anyone got a picture of the switch in situ? had a look on the guides but cant see it

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I'd just like to thank @rj713, as your "another possibility" was the correct one for me. I recently acquired a Wallstreet in extremely good quality because the hard drive broke down early on and was never used after that. So I replaced the hard drive, which triggered this glitch with regard to the sleep switch.

After I held a small magnet next to the case for a few seconds, I was able to finally wake my computer from sleep. My mouth fell open from surprise. Didn't expect it to work, but it did. Thanks!

edit: in case the original link goes down: replacing the hard drive might generate a magnetic field that's slightly too strong for the Wallstreet's design. When you close the cover while it's on, it will not wake up from sleep mode, and if you close it after shutting down, it will not start up. You will hear an "electronic clicking" sound when you press the power button. Resetting the PMU won't help. Simply holding a regular magnet (I used my MagSafe 2 converter) against the case next to the delete button can 'reset' it.

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