In need of a mac wiz-who knows something about external displays

Hello...
I posted yesterday about my LG 19” Flatron LCD Monitor. I see that people have read the post, but no one seems to have an answer. Therefore, I thought I would ask again. I called apple support twice, but since my apple care expired a while back, they could only send me to articles in the support section. However, none were able to resolve the issue. There are 3 problems:
1. When the powerbook is turned off, lid closed, etc., if I plug my VGA adaptor into the powerbook, the computer immediately turns on. Please note- I did not hit the power button and the LG monitor is turned off- only plugged into the outlet.
2. Once the computer is on and the monitor is up and running, I cannot put the computer to sleep. The display will go to sleep for a second and then the computer will kick back on. Please note- I use my laptop at home like a desktop- the lid is closed and the computer is operating with the external display.
3. I cannot shut down the computer when the VGA adaptor is connected to my computer.
Concluding remarks- for some odd reason, the LG monitor is controlling the sleep and power functions of the powerbook. How can this be? Even the apple support person had no idea why the computer would turn on automatically once the VGA adaptor is connected.
Well, thank you for your time, and I hope there is someone out there who has some advice- even software that I can download which may allow me to control the power settings to put the computer to sleep.
Best,
Adam

Hi, composeras. I don't think I can shed any real light on your odd problem, but I have a couple of questions about it.
1. When the powerbook is turned off, lid closed, etc., if I plug my VGA adaptor into the powerbook, the computer immediately turns on...
Are you sure the computer is actually shut down when this occurs, and not just sleeping? Plugging almost anything into the PB when it's asleep will normally wake it. Plugging things in when it's really turned off certainly shouldn't, and normally doesn't.
2. Once the computer is on and the monitor is up and running, I cannot put the computer to sleep...
Are any USB devices connected to the computer when this happens? Nothing fouls up system sleep like some USB devices do. Disconnect all USB devices except keyboard and mouse (are those Apple-branded, by the way?) before putting the machine to sleep, and see whether that makes any difference. If a USB hub is in use, that in itself could be the culprit. Some USB devices prevent sleep completely by communicating with the OS every few seconds or minutes. If your LG monitor itself contains a USB hub, disconnect it from your PB's USB port and see whether matters improve.

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