External monitor shuts down laptop

Hey All,
I've got a weird problem that just came up. I've got a 17" external Apple flat screen monitor that I got off of eBay about 4 months ago. I bought the Apple DVI to ACD display adaptor and have been using the external as a second screen when I'm editing video and authoring DVDs. Everything was great until two nights ago when I plugged it in and all of a sudden it caused my laptop to shut down almost immediately after I connected it to my PowerBook (17" - about 1 year old). I checked it on my older 15" PowerBook and the same thing - shuts down right after plugging it in. I finally checked it on my even older G4 desk top and there were no problems - stayed on and didn't shut down. I've tried just about every variable - plug it in when I boot, plug it in after it's warmed up, charger plugged in - not plugged in, you name it, all of a sudden after 4 months it just stopped working with my laptops. Any suggestions would be grateful as I do alot of editing and the external monitor has made my life much easier because of the added real estate. Thanks in advance-
17 Powerbook & G5 iMac Mac OS X (10.4.1)

either you could try different adapter with your monitor - if it does not work, it's the display.
or you could take laptop and adapter to the store and ask them to connect it to different monitor - if it works like that, adapter is probably ok.

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External monitor shuts down laptop

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