MBP - late 2007 - external monitor stopped working

I have a late 2007 MBP pro, 17" monitor.  I have been using a 30" dell monitor (3007WFP) as an external monitor for home use.  It has been working fine for 4 years.  Last night the monitor stopped waking up from sleep and now only gives a blank screen even after reboots.  The monitor seems ok ( it goes through the self-test routine normally), and I have tried different cables with no success.
I have tried resetting the SMC and the PRAM  on the MBP but that too did not fix it.
The monitor has an orange LED light on the power button indicating the power is connected (though it is not blue which would indicate it is receiving a signal).  It also recognizes that is has a DVI hook-up (or else it would repeat the self-test). 
The MBP detects the external monitor (or at least seems to - it is listed as a display and allows me to choose a resolution, although obviously that does nothing since the monitor is completely black). I haven't yet been able to get another laptop or monitor to test the other components to make sure the monitor is ok. 
Does anyone have any other suggestions? 
Thank you

Your on the right track when you said "I haven't yet been able to get another laptop or monitor to test the other components to make sure the monitor is ok.".  Also include a different cable in that scenario, if you can.
Ciao.

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