Mac mini, isn't sending the signal to my LG flatron L204WS monitor

Hi
Suddenly tonight my mac mini is not sending the signal to my LG flatron TV (it's worked fine for the past year).
The troubleshooting I have done so far with positive results is:
1. installed the mac mini on a 32" tv using a DVI to HDMI cable - works fine
2. installed the mac mini on a 32" tv using the existing VGA-VGA/DVI adapter (same configuration used on LG) - works fine.
3. use the LG flatron to connect VGA-VGA with my laptop - works fine.
??????? any ideas?????
thanks
L

HI
Thanks for replying, in pure desperation I opened her up and blowed away the dust and tried it with the top off. Hey presto she booted up to the flatron no problems.
thanks

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