Question about HP Compaq Presario V2000 Notebook

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Screen (display) light blown

Thank you very much!!! The loose connection was the problem. Unfortunately, now I have another problem. While putting the screen back together I shorted out something in that little rectangular circuit board beneath the bottom of the screen (The one with the thin guage pink and white wires) trying to put the tiny screw back in. It looks like the light on the screen is now blown. Is this repairable or even worth repairing?

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Re: Screen (display) light blown

I just posted to you on your other enquiry. Can u explain what that light is for u said ligth on the screen....sorry what you mean there

Posted on Oct 05, 2007

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Packard bell TM85 power on, but black screen...!

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Dell inspiron

Meaning the graphics chipset is OK.

Problem lies with the Video Cable, or Display Assembly.
(Dell: Display Panel Cable = Video cable)

The Display Assembly is the;
1) Display Bezel: Plastic thin frame in front of the LCD screen.

2) LCD screen (Dell = Display Panel)

3) Screen Frame: The thin metal frame which surrounds the LCD screen layers, and also holds them in place. (Resembles a picture frame, and can be disassembled)

4) Camera (If applicable)

5) Screen Inverter: (Dell = Display Inverter)

The Display Panel Cable (Video Cable) is a thin flat ribbon cable.
One end connects to the motherboard, the cable then goes up by the left Hinge, and the opposite end connects to the back of the LCD screen, in the Display Assembly.

1) A connection may be loose. One end of the video cable may be loose, to it's connector.
BOTH the connection on the motherboard, AND the connection at the back of the LCD screen, need to be checked.

This means partial disassembly of the laptop body, to check the motherboard connection. It is under the Keyboard.
ALL power removed from laptop, AC adapter (Charger), and Battery, the Center Control Cover needs to be removed next, then the Keyboard,

Also look at the condition of the sheath, of the video cable. If there looks to be apparent damage to the sheath, the tiny thin wires inside may also be damaged. (Stretched/Broken)

Checking the connection of the video cable at the LCD screen, requires opening the Display Assembly.
This requires removing the Display Assembly first,

Both connections check out? Prove to be tight? (If you open the Display Assembly, and the video cable falls off, it wasn't tight)

I would then suggest performing a continuity check of the video cable.
Check each wire in the video cable. (Multimeter set to Ohm's, see if electricity passes through the wires. Continuity)

If the video cable proves to be good, then the screen Inverter is next.

An LCD screen cannot produce light by itself. (Or enough light)
It needs an additional light source.
A Backlight is the additional light source.

A Backlight can be a CCFL, or a series of LED lights.
The Dell Inspiron 1545 Notebook PC uses a CCFL as a Backlight.

A CCFL is a Cold Cathode Fluorescent Lamp.
Similar to Fluorescent lighting used in homes, and businesses, but on a MUCH smaller scale.
{ Example: 2mm Wide and 334mm Long. That is approximately a little thicker than 1/16th of a inch, (.078), and a little longer than 13 inches }

A screen Inverter converts the power (Electricity) from the laptop, for the Backlight, and LCD screen.

90 PERCENT OF THE TIME the fault is the Inverter.

Fortunately it is also the cheaper of the parts, when compared to an LCD screen, and is easier to access.

It is behind the Display Bezel, and mounted at the bottom of the LCD screen frame.

[ In the Display Assembly link above scroll down to the subheading -
Display Bezel.
In the first photo under the subheading, the screen Inverter is shown at the bottom, of the LCD screen.

This example shows it in more detail,

To test a screen Inverter you need a sensitive multimeter. This = $$$$
(Or you can use a good Inverter to test)
Barring that the two examples above are not feasible, the alternative is to buy, and replace the screen Inverter.

A) Video Cable checks out it's on to the screen Inverter.
B) Replace screen Inverter does not fix the problem, the problem is a bad LCD screen.

I'm betting on a loose connection of the video cable, at the back of the LCD screen. Just my thoughts.

Post back in a Comment, (Or Comments), as to your findings.


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The best option is to use external monitor to backup data before sending it to replacement.

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Sorry my prognosis is not better...
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Here's a link to the Inspiron 1525 service manual:

Your responses are intended to improve the level of service provided. Please show your appreciation by rating your experience.
Thank You.

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