It sounds more like a monitor internal problem rather than a cable.
However in answer to your question--No you won't need special tools but all models are different. Make careful note of the connections. Most models use plugs although some soldering may be necessary.
Be careful of charged electrolitic capacitors and especially the CRT high voltage connection. Such can be shocking but not death dealing.
Although some folks will tell you otherwise.
mikemichel
--- On Tue 07/15, Howard Rubin wrote: Can I replace a monitor cable?
I've never opener up a monitor before (last thing was a Hallicrafters<br>Kinescope!) and I want to replace a video cable. The monitor when pluged in any computer) turns very dark, indicating there is a connection, so I believe the cable is bad. How difficult is this, do I need any special tools?
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