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LCD monitor going black after several seconds


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#1 Wai Wai

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Posted 04 March 2011 - 07:03 AM

LCD monitor going black after several seconds

This is how the incident occurred.

A roommate used a towel to clean the back of the monitor, but he mistakenly loosed the power cable a bit (on the monitor), and so the monitor went off. Once replugged, the monitor acted weird.

Every time you switch on the monitor the screen is lit for several seconds. Then the screen will turn black (the power button is indicated on). You switch the button off and then on. The screen will show for several seconds and turn black again.

I tried to remove all cables and put them back. It doesn't work.
I tested the monitor in two computers with the same (miserable) result.
I used different cables too. Tried both D-SUB and DVI. No luck.

It's hard to believe the monitor went out of order after such clean-up. How could this happen?

Any pointer to the problem?

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#2 Platypus

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Posted 04 March 2011 - 05:32 PM

The description of the symptom sounds like the backlight inverter protection shutting it off. The power indicator remaining illuminated shows the power supply itself is continuing to run.

It could be just a co-incidence that a component failed at that time, but it could also be something like a solder joint that was becoming fractured due to thermal expansion/contraction and the mechanical and electrical jolt pushed it over the edge.

What model of monitor is it?

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#3 Wai Wai

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Posted 19 March 2011 - 07:29 PM

Thank you for your reply.

We have finally sent the LCD monitor back to the manufacturer. It fixed the problem for us within 1 day.

#4 Platypus

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Posted 19 March 2011 - 10:23 PM

That's good news. Thanks for letting us know.

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