2.11) Monitor repair
Unlike PC system boards where any disasters are likely to only affect
your pocketbook, monitors can be very dangerous. Read, understand, and
follow the set of safety guidelines provided later in this document
whenever working on TVs, monitors, or other similar high voltage equipment.
If you do go inside, beware: line voltage (on large caps) and high voltage
(on CRT) for long after the plug is pulled. There is the added danger of
CRT implosion for carelessly dropped tools and often sharp sheetmetal
shields which can injure if you should have a reflex reaction upon touching
something you should not touch. In inside of a TV or monitor is no place
for the careless or naive.
Having said that, a basic knowledge of how a monitor works and what can
go wrong can be of great value even if you do not attempt the repair yourself.
It will enable you to intelligently deal with the service technician. You
will be more likely to be able to recognize if you are being taken for a ride
by a dishonest or just plain incompetent repair center. For example, a
faulty picture tube CANNOT be the cause of a color monitor only displaying
in black-and-white (this is probably a software or compatibility problem).
The majority of consumers - and computer professionals - may not know even
this simple fact.
This document will provide you with the knowledge to deal with a large
percentage of the problems you are likely to encounter with your monitors.
It will enable you to diagnose problems and in many cases, correct them
as well. With minor exceptions, specific manufacturers and models
will not be covered as there are so many variations that such a treatment would
require a huge and very detailed text. Rather, the most common problems
will be addressed and enough basic principles of operation will be provided
to enable you to narrow the problem down and likely determine a course of
action for repair. In many cases, you will be able to do what is required
for a fraction of the cost that would be charged by a repair center.
Should you still not be able to find a solution, you will have learned a great
deal and be able to ask appropriate questions and supply relevant information
if you decide to post to sci.electronics.repair. It will also be easier to do
further research using a repair text such as the ones listed at the end of
this document. In any case, you will have the satisfaction of knowing you
did as much as you could before taking it in for professional repair.
With your new-found knowledge, you will have the upper hand and will not
easily be snowed by a dishonest or incompetent technician.
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]the back then should slide away to the rear exposing the metal faraday cage around the internals.
