Question about Dell W4200 42 in. HD-Ready Plasma Television

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Have sound but no pic when it is turned on

Dell flatscreen monitor. I have sound but no picture shows when it is turned on.

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  • cj33 Sep 26, 2009

    See three small green lights in back of the set coming out of the grill but that is it.

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  • 146 Answers

Look in the back of the set and see if you can see a light coming out of a grill, if not you probably lost your lamp or something related like the back light power supply. This is high voltage and if you aren't familiar you may want to call a professional to look at it.

Posted on Sep 25, 2009

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Posted on Jan 02, 2017

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1 Answer

Power light turns green then red no pic or sound


Hi David,
If your LCD TV or monitor has stopped working, or is displaying one of the following
symptoms, then it's a candidate for some new capacitors
- Flickering screen
- Screen image disappears after several seconds
- Dim screen
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The primary cause of LCD TV and monitor failure is caused by faulty capacitors. You can
examine the capacitors in your LCD TV or monitor and actually see if they are bad.
If they appear bulged on top, then they need to be replaced.
New capacitors will solve a host of problems in LCD monitors and TV's and will extend the life
of your monitor or TV by several years.
Check the cables, connectors and connections.
If your TV, flatscreen, or monitor is more than 5 years old it is more like to have suffered a
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Take it to a repair shop.
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Dell's laptop cannot show the picture in screen.?


Connect to an external monitor and restart ur laptop. If the pic displays on the external screen then most likely you have a bad screen. If not then try reseating your ram chips. If that doesnt work get a new laptop

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The screen on my acer aspire 3100 crack so i bought a vga cable to connect to my flatscreen but the picture switches back to my laptop when its starts up the only way that it works on my flatscreen is when...


Go into your display settings. It should show at least two different monitors. Your laptop monitor and the external one your plugged into. Click on the external one and click on the two check boxes. Click on extend the desktop into this monitor first. Then click on this is my main monitor. Reboot your computer and it should be on your external monitor.

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1 Answer

My 22" dell lcd flatscreen monitor just went out


I know it sounds stupid, but check all the cables and connection. Also make sure the cables are in good order.

Now with that out of the way. Is it getting any lights or indications of power at all? If so it could be a cable or connection point.

Worse case senerio, if your not getting any lights or indications of power (sometimes it seems like it should turn on) the monitor may have had a capacitor or power supple unit failure.

LCD can go out like that from long use or heat. If its older than 4 years its possible its done.
You can have someone open it up and check for budging or bad capacitors. This may be a cheaper option if you have someone is town.

Sorry to hear about the monitor. Good luck!

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1 Answer

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If the TV menu displays your problem is most likely not the Tv , but is caused by the signal source:
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1 Answer

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Since you cannot power on the monitor with the power switch on the monitor, then it can be the power supply or the logic board, or the inverter has shorted circuits so it makes the power supply go into shutdown mode.
This monitor uses 14vdc 3A power supply, so what you can do is to verify that you do have 14vdc at the DC input jack with monitor in the OFF mode, then try turn on the monitor to see if the 14vdc drops down to lower than 12vdc or so.
The inverter board has fuse also.
I do not have the pictures of the board for this monitor, but if you can post the pictures, then it will help a lot.
Does the inverter board look like this? http://www.badcaps.net/forum/attachment.php?attachmentid=12595&d=1259317517
At this point I will concentrate why the monitor will not turn on first, you can disconnect the ribbon cables attached to the inverter board and see if the monitor will power up.
http://s807.photobucket.com/albums/yy352/budm/DELL/

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Under options for the monitor try degauss. This will de magnetize the monitor which may help.
Don't try to fix anything on the inside because old CRT monitors have dangerous capacitors
that can cause an electrical shock even when unplugged. Personally I would recomend getting
a new flatscreen. In the US they are pretty cheap even for a large screen, and burn much less electricity and look much better. If looking for a new monitor check online usually much cheaper
than big box stores. Newer models also have better refresh rates than the 1st ones that came out
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Probably a bad power supply in the monitor. One of these days it will go black and stay that way.

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hi..the reason due to this problem may be
due to the circuit board.If the soldering is not
done in any part of the main board this type of
problem occurs.check the board completely.
check this out..
thank u..
rate me..

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1 Answer

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Hi...there,
It's seems you got a busted backlight inverter. If you still under warranty send it back to Dell for repaired. Happy Holidays!

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