monitor issue

I received a call from one of my clients who mentioned to me that their monitors just went out.  Upon arrival, I checked the physical connections and they seemed to be connected properly, but I still see the following issue - see attachment.  The monitor in question is a Sony sdm-hs94p.  I rebooted the pc and still nothing and the strange thing is that when I attempt to hit the SCROLL LOCK key on the keyboard, no lights turn on/off.   The same thing occurs when I hit the CAPS lock key as well, no lights turn on / off.

Any ideas on how to troubleshoot? or fix? monitor issue
ee4itpro2Asked:
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NAMEWITHELD12Commented:
can you plug the monitor into another pc?
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NAMEWITHELD12Commented:
or vice versa  can you isolate the issue to the PC or monitor , it looks as if it is a DVI-D connection right?
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Dave BaldwinFixer of ProblemsCommented:
I don't think that machine is booting up.  Too many malfunctions.  The computer is bad.
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NAMEWITHELD12Commented:
maybe , but we need to isolate the issue , maybe a cable or just the DVI-D port on the pc
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Dave BaldwinFixer of ProblemsCommented:
Yes, I would shut it down and test the components on another computer.
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ee4itpro2Author Commented:
Just for the record, it is not a DVI connection.  I thought about switching out the cable itself as well.  I'll see the client tomorrow, but I'd also welcome any other suggestions as well.
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NAMEWITHELD12Commented:
I am sure you know to do all of this , but this is my thoughts on the issue so far ,  draft logic map for monitor issue
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nobusCommented:
as said, first determine if the problem is with the monitor or pc, by plugging this monitor into a working pc, or plugging a known good monitor on this pc
if the problem is with the pc -  we need more info on what is happening : any boot screens visible, lights on keyboards, disk running (activity light) etc...
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JBX82Commented:
I also had such a problem => videocard broken
- test monitor on an other pc
- change videocard in pc
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copyrightedCommented:
Try removing ALL the ram and powering the pc on.  If it does not beep, the motherboard is most likely dead.  If it does start beeping, try different RAM.  Also, try removing any addin cards (video, sound, etc.)
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