MiniDVI to VGA adapter not working

Just last night the adapter was working fine at home connected to CRT display.
But now at office it is not working connected to LCD.
Nothing happen at all, MacBook doesn't detect the connection. Nothing on System Preference > Display, and nothing on About this Mac > More Info.
Looking at the adapter pins (male MiniDVI), at first I thought 2 of the pins fell off or something but after checking internet, those pins (21 and 23) originally not installed. Thats fine.
However, some of the other pins are shorter than others.
Is this a defect or original condition also.
I am not sure the problem is with the adapter or the MacBook connector or the LCD.
Can somebody assist.
Thanks.
-will try again on the CRT when I get home.

yup. but it still didn't detect.
by the way, the connection with the LCD was working fine 2 days ago.
so i guess the problem is either with the adapter or the MacBook's connector.
is there any way to check whether it is one or the other?
(other than taking them to the service center)
Thanks Mort.
MacBook Mac OS X (10.4.9)

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