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Monitor on a 400 vtx gateway

My scree is dark You can hardly see what's in it. I purchase a inverter board and I replace it. For a couple of minutes the monitor works fine and then it goes back to the original problem witch is dark and hard to see what's in it. Any suggestions. Is it a light bulb that I may need to replace also.
Thanks

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  • vanina Apr 29, 2008

    thanks

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Check the output voltage of the invertor board , if its 150 volt (point of cold fusion lamp connection) then the drive electronics of the invertor board from the motherboard is damaging the new invertor boards which you are trying to replace. Check input to the invertor board it should be 5 Volts and 12 volts .

Posted on Apr 30, 2008

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The problem you described, is related to the inverter board.
There's a little board, that take care of lights on the monitor. You must replace the inverter board to solve the problem.

Here you have an image, of an inverter board.

ed452f58-06a1-44e2-8fe4-71fd08bc1dd5.jpg

Good luck, and be safe!
Inverter boards, it's dangerouse to replace yourself if you don't know what you are doing. High-Voltage inside :)

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Have you tested it with an external monitor?

I would say you either have a damaged inverter board or screen baclight lamp. Usually the inverter board fails in one of the following ways:

1. When you turn on the laptop, the screen lights up for a short period of time and then goes dark. You still can see an image but it is very dark, almost invisible and definitely not usable. When you restart the laptop, the screen lights up and then goes dark again. The laptop works fine with an external monitor.
2. Your laptop turns on but the screen remains dark all the time. You still can see a very dim image outline. The laptop works fine with an external monitor.
3. The laptop screen works fine for hours or even days, but sometimes it goes very dark as it mentioned above. When you restart the laptop, the screen works fine again.

Inverter failure symptoms are very similar to backlight lamp failure symptoms and in most cases you cannot tell which one is causing the problem until you replace either the inverter board or the backlight lamp. From my personal experience, inverter boards fail more often than backlight lamps. If you have to guess, replace the inverter first.

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If it was not the right kind of LCD it may have blown the inverter (where the LCD connects and the cable going to the motherboard). You should order parts only from an authorized Gateway part reseller as advertised on the Gateway website. I have included a link to one such place below, where you can purchase a new inverter board and LCD screen if needed.

http://www.mundocorp.com/gateway-laptop-parts/m1628.html

Good Luck,

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The LCD connector cables are probably not plugged in properly. Since it works with an external display it cant be anything else. The connectors are inside the cable. If you are sure that the connectors are fine then you will probably have to replace the LCD inverter board. Hope that helps, Sai.

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Sounds like either the Backlight or the LCD inverter is bad, if you hear a high pitched whine it is the inverter, if it is just dark it is more than likely the LCD, check out ebay for a replacement...

Hope this helps.

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Your problem is in the inverter circuit. But the problem with these is normally easy to fix. It's the capacitors in the power supply board that need to be replaced rather then a direct repair to the inverter circuit.

If you have good electical knowledge then you will already know how to do this repair.
If not, then its best left to someone who does like your local TV repairman. The voltages inside LCD's go far above what you have comming from your power outlets in the house.

It should not cost a lot to have taken care of though by a professional. Call around and get a few rough quotes.

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Hi this is the way how to examine what's wrong with your LCD monitors. Power on both CPU and monitor. After the scree goes dark, you check that you can see the image on the screen by shining a flashlight into the screen, not directly but find the best angle to the screen and take a look very closely. If you can see the icons or any image, there will be a minor problem. Like me, I can see window image using flashlight and check lamps inside. Some of them were broken and it is easily replaced. If you cannot see anything on the screen, there'll be some problems with inverter board. If you have soldering tool and want to fix it by yourself, check the caps first. It may cause this problem. Some caps might show leaking or burn spot on the board because of too high temp. If you don't have soldering tool, you better go get a technician to do so.

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I did some poking around and only found a few places that sold inverter boards for this monitor. Ebay has one that sells for about $80: http://cgi.ebay.com/Backlight-Inverter-for-Gateway-FPD1930-LCD-Monitor_W0QQitemZ160070918225QQcategoryZ174QQrdZ1QQssPageNameZWINQ3aPOST0Q3aRECOQ3aBINQQcmdZViewItem I wasn't able to find any specific instructions posted, however, taking a typical LCD panel apart and replacing the board shouldn't be too difficult. The only hard part is not getting shocked, which is why this is not a job for the typical user. Anyway to disassemble the typical LCD you remove the pedestal from the back of the LCD then remove the screws around the back of the LCD, remove the back and look for the inverter board. Typically it is covered with a metal shield; again the hard part is knowing how to correctly handle the parts. Considering you can buy a new 17" LCD for $120 to $150 (and has a 1 year warranty) you might want to consider investing in a new monitor instead. If you have any other questions let us know, otherwise please don?t forget to rate this posting.

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