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How to replace my backlight, for a compaq 2500

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Your laptop's LCD is illuminated by cold-cathode bulbs, often times a specific size for fitting purposes within your laptop's screen (as size constraints and cosmetic differences can leave little to no room withing the top lid for standard bulbs).

Replacing the back-light bulbs requires the original parts, or replacement as approved by the manufacturer. The first place I would start would be contacting HP (who now owns compaq) at 1-800-hpinvent and inquiring as to the cost for just a replacement screen for your model. Otherwise, you can order one from eBay or some other similar online resource.

The actual installation is quite simple, but it requires about 15-20 minutes of time, and three or four specific tools.

You have to disassemble the top lcd beveled casing, you have to detatch the lcd from the video flex cable that runs through the hinges of the unit and underneath the keyboard bevel. And re-attatch all said parts when you are complete. Keep track of the screws you remove in order to release the casing. And on the screen, often times those little rubber dots along the LCD screen actually need to be removed to locate several more screws.

That solution is if you purchase the entire LCD replacement contained together, which can be considerably more expensive than just replacing the back light. But finding the compatible parts to replace your LCD's defective ones might be close to impossible.

A quick search to help explain the process of replacing the cathode bulbs brought up this website via google:

http://www.inventgeek.com/Projects/shorts/overview.aspx

It has pictures that help illustrate the process for a standard screen. You would modify the instructions for your laptop's LCD screen.

If you do purchase a replacement LCD kit, you can always bring it to a Geeksquad technician and request an estime, or shop around to find a certified repair center that will install it for you.

Hope that helps.

Posted on May 01, 2008

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My hp compaq Presario V6500 has been damaged and a computer dude in Bathurst NSW said we need a bulb replaced in the screen as it won't light up. Computer functions via TV. R there any local repairers for...


The monitor screen on your laptop is an LCD screen.

An LCD screen cannot produce enough light by itself. It needs an additional light source.
The additional light source is a Backlight.

A Backlight is a CCFL.
Cold Cathode Fluorescent Lamp.
Similar to Fluorescent lighting used in homes and businesses, but on a MUCH smaller scale.

LCD screens are a composite of layers. The layers are held together by a metal frame, much like a picture frame.
The Backlight is usually located on one side, accessed after removing one side of the metal frame.

As stated, a Backlight is a very small type of Fluorescent lamp, (Tube)
Very fragile, easily breakable, and not usually approached by one who has very little, or no experience in replacing.
More common the entire LCD screen is replaced, which includes the Backlight already installed.

A laptop also needs an Inverter to provide power, both for the LCD screen, and the Backlight.

90 percent of the time the fault is the Inverter.
I repeat, 90 percent of the time the fault is a bad Inverter.

An Inverter is cheaper than an LCD screen, and MUCH easier to replace than a Backlight.

Allow me to show you replacing an Inverter on an HP Pavilion dv6000 series laptop.
Granted, it isn't an HP Compaq Presario V6500 series, but the principles still apply the same,

http://www.insidemylaptop.com/remove-replace-lcd-screen-inverter-hp-pavilion-dv6000-laptop/

I can also provide a free link, to the Service Manual for an HP Compaq Presario V6500 laptop, direct from HP Support,

http://h10025.www1.hp.com/ewfrf/wc/manualCategory?lc=en&dlc=en&cc=us&lang=en&product=3369429&

In the list click on;
Compaq Presario V6500, V6600, and V6700 Notebook PCs-Maintenance and Service Guide

This is a PDF file.
Allow up to 30 seconds to see the first page, and an additional time may be needed to fully download.

In the Bookmarks menu on the left click on the + sign next to;
1) Removal and replacement procedures
2) Component and replacement procedures
3) Display assembly

And/or go directly to Page 61 to view the Inverter location.

One example of an Inverter for an HP Compaq Presario V6500,

http://www.sparepartswarehouse.com/Compaq,Presario,V6500,Laptop,Inverters.aspx

Granted this is not what you asked for.
My premise is to teach, and hopefully save people money.

If you have additional questions please state in a Comment.
Regards,
joecoolvette

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