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My compaq presario lcd is working but it has no lights

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If by lights, you mean the LED lights located around the exterior of the laptop (like the power light, hard drive light, etc.) then you may have accidentally switched those off.

First you need to locate the 'FN' key. On most laptops it's located on the bottom left of the keyboard, under the 'shift' key.

Next you will need to look for a symbol on the keyboard that would represent the LEDs. It's usually a light bulb, and is almost always located on the 'Fx' keys on the top of your keyboard (F1, F2, F3, etc.).

Once you have located the correct key, you need to hold the 'fn' key that we found earlier, and press the 'Fx' key that corresponds to the LED (or light bulb) button.

For example, on a older model Gateway laptop, I will hold the 'FN' key on the bottom left, and press 'F1'.

If by lights you mean the backlighting for the LCD screen, which would make the LCD screen appear very dim, then you will have to have the screen serviced or replaced.

I hope that helps, and if you have any questions, please let me know.

Posted on Dec 11, 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

Mar 06, 2011 | Compaq 449901-001 - HP Presario V6500...

1 Answer

My compaq presario f557us hard drive is working butI have no screen any help please?


Replace the memory sticks one at a time in each slot one at a time. If that doesn't work, reseat the lcd cable from the back of the lcd and to where it connects to the motherboard.

If the hard drive light is still running like its loading up windows then at that point, replace the lcd screen and cable cause that means voltage isn't getting thru the cable to get to the screen.

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1 Answer

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Sounds like the auto-dim in the BIOS is set too low. Fortunately the Compaq R3000 allows you to adjust the brightness right from the keyboard. Hold down the [FN] function key while tapping the [F8] key will brighten the screen, while [FN]-[F7] will dim it. The settings are different for running on AC power and battery, so you must do each individually.

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Wont post


after turning on wait for a moment.. about 5 mins. then press fn+f4

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