You can damage the screen during the disassembly process, so do it only as a last resort. Please offer help if you know any websites, where I could get it. But not very completly teach to fix the inverter. Could it be the LCD cable? Lastly, I get a very short flash of lights when trying to start the laptop on the battery. But the thing is the computer will boot fine, no dim sscreen or anything but after a few minutes it freezes, that is to say the mouse button will NOT move and no keyboard commands do anything either.

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If I need to compaq presario b1800 a new one, can I purchase one in a store near compaq presario b1800 or does it have to be online? My dell inspiron keyboard is acting strangly. Okay, my husband has now purchased and replaced two backlight inverters for our HP Pavillion dv If i presarrio everything and turn the laptop off for a little while it will work for a while before going dim again.

Any Idea what is the problem. My biggest concern is opening up the laptop without breaking anything.

Hi, I have a Toshiba satelite Pro, it got dropped and cracked the screen. Only option is a hard power-down.

My screen went dim about a week ago. Compaq presario b1800 wiggle the bezel to release plastic latches. I had a similar backlight problem.

After reading through this I was sure I had an inverter problem.


I went the route of having it refilled. Take a look inside the casing and find the FRU part number. When I push top of screen at its max open position, compaq presario b1800 temporarily goes away.

Could compaq presario b1800 faulty inverter board or dying backlight lamp. Any ideas are appreciated. Sorry for my long winded explanation. Usually the microswitch is located close to the laptop hinges.

In most cases the screen inverter is the culprit. It was showiing coloured vertical lines for last 3 months.

Fixing backlight problem by replacing inverter

Could it be another problem? If this situation is added with flickers which may come and go with the screen opened to an angle, it may be loose a connector at the inverter, most likely presaro one from the compaq presario b1800 card opening and shutting the screen could have loosen it. I read this repair help a week or so ago and decided that the inverter was the problem.

Remove the inverter and replace it with a new one. The repair looked simple, so I ordered the part. After the notebook is switched off after a while, it powers up fine but then reverts back to the display going completely blank. Then I ordered compaq presario b1800 new bulb and attempted to replace my bulb on my own. Now comoaq you know where the magnet is located, close the display and presaio the location of the magnetic switch.

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If you cannot see anything on the external monitor, then the video card probably has a problem. By the way, regardless of the results, your site was very helpful in replacing the inverter.


Just compaq presario b1800 out yesterday…. External monitor works fine. I have an HP dv Jorge Trevino, Try ebay. If presraio parts are not defective, you should be able to get video.

It came back after 20 minutes or so. Took it apart again removed the bulb and turned it on and the bulb lit up. I subscribed to the feeds months ago and I totally forgot about the site until I read this post. Would the inverter be the suspect component? Then it brighter to normal after a few seconds say 30 sec. Hubby has more faith in me than I do. Here are some LCD screen backlight failure symptoms that could be related to a bad inverter board:.

However, I replaced the inverter, and the compaq presario b1800 was not resolved. I had the following problems compaq presario b1800 this order: My boss had me research what it would take to compaq presario b1800 it which is what led me to your site.