NEC LCD monitor worth fixing?
By Peter1 - usenet poster
I have a 2-year old 17" NEC LCD Monitor (LCD1735NXM), which has
developed a faint buzzing sound, along with the screen going completely
pink intermittently. When I tap on the case, the sound changes slightly,
and the screen goes back to normal for a time.
I have an electrical background, but before opening the monitor, I thought
of getting some ideas whether this sounds like a bad soldering connection,
which may be fixable, or whether this could be the sign of something else,
and not worth fixing. Thanks for any feedback / experience someone may
have with these monitors. Ken
developed a faint buzzing sound, along with the screen going completely
pink intermittently. When I tap on the case, the sound changes slightly,
and the screen goes back to normal for a time.
I have an electrical background, but before opening the monitor, I thought
of getting some ideas whether this sounds like a bad soldering connection,
which may be fixable, or whether this could be the sign of something else,
and not worth fixing. Thanks for any feedback / experience someone may
have with these monitors. Ken
Solution #4
posted on Aug 01, 2007
Luisa_K - usenet poster
Rank:
Apprentice
Rating: 0%, 0 votes
ApprenticeRating: 0%, 0 votes
Sounds like the backlight tube is bad. The mercury depletes with age and
you can be left with a dim pink screen. This also changes the electrical
characteristics of the lamp which may result in the inverter buzzing.
you can be left with a dim pink screen. This also changes the electrical
characteristics of the lamp which may result in the inverter buzzing.
Solution #6
posted on Aug 01, 2007
Reynolds - usenet poster
Rank: Apprentice
Rating: 0%, 0 votes
ApprenticeRating: 0%, 0 votes
...
With a background, you should be able to work on it. Tap on local areas
once it is open. Does tapping ever cause the symptom? If it does, it is
going to be a lot easier to find the area of interest.
Look closely at all connectors and sockets once it is open. Tap them and
wiggle them.
Also, flexing circuit boards with an insulated tool is a good way to find
intermittents. Cold spray is also used, but I doubt it will be useful in
your situation.
With a background, you should be able to work on it. Tap on local areas
once it is open. Does tapping ever cause the symptom? If it does, it is
going to be a lot easier to find the area of interest.
Look closely at all connectors and sockets once it is open. Tap them and
wiggle them.
Also, flexing circuit boards with an insulated tool is a good way to find
intermittents. Cold spray is also used, but I doubt it will be useful in
your situation.
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