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After the computer is on for a little while my monitor goes black I have only had it for 2 and a half years am ready to go back to hewlitt packard. I need answers

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2-1/2 years is pretty good, most caps will fail in that period of time.
Please read on and learn about bad caps and poor quality built of ALL monitors you buy today.
If you are going to DIY and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply (they should be replaced in a set), blown fuses; poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
http://en.wikipedia.org/wiki/Capacitor_plague

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

Posted on Aug 22, 2010

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HEWLITT PACKARD MONITOR HP L1950g suddenly gone dark...still powers up


There are several things that might have happened. Blown backlight, broken input port, or blown capacitor/power supply.

If your backlight is broken, you will still be able to faintly see the picture if you shine a flashlight onto the screen. This is a possibility because you're monitor may not notice that the backlight is broken so it will give you the green light.

Try another input if possible. I believe that monitor only has VGA but if it has DVI try the one you haven't been using. I doubt this is the case but it's possible. Also try another PC or different input source and even a different cable if you have one. You want to make sure the monitor is getting a solid signal.

The other possibility is that you have blown a capacitor. They often fail on monitors and TVs. If you are handy with a soldering iron it is an easy fix but you will have to open the monitor to diagnose. Check badcaps.net for specific instructions on how to do this.

Unfortunately, there is no easy fix. The easiest thing to do in this case is replace the monitor but if you have no other choice, just open it up and see if you notice anything wrong. You have nothing to lose since it's already broken and if nothing else, you'll see what's inside and potentially learn from it.

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Solution 2, your cable is loose on the back of the monitor. Make sure you have the screws tightened on either side of the vga or dvi cable, both on the back of your monitor and on the back of your computer or laptop.

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It is likely not a problem with the monitor, because the lights indicate that the monitor is turned on.

It may be a video card problem. Do you know if you have a video card, or if it is integrated graphics? Check all of the connections from the monitor to the computer. If you can connect the monitor to another computer and it works, then it is definitely your computer.

Very, very unlikely, but it could be that you're using a damaged cable. If you have another one on hand, try it. If not, don't go and buy one because this likely isn't the problem.

Another thing you could try is turning the computer off, unplugging the power cable (going to your computer), and hold the power button for about 30 seconds. Then plug it in again and power it up.

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