Question about HP Compaq Presario V2000 Notebook

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Screen i cant see my screen its went blank as if the bcklight has failed is there anyway to reolve this

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Re: screen

The lcd power inverter may need replaing. It is a piece that, if it goes out the screen is dim or too dark to see. The above is right. Check with external and if you see the screen then the video card is good. And you should try replacing the inverter before the LCD. Sig

Posted on Jan 22, 2008

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Re: screen

Try pressing Fn-F4 a couple times. Sometimes people accidentally enable the external screen and disable the internal one. If this doesn't work, try plugging an external screen in. If the external works then you might have a dead display.

Posted on Jan 20, 2008

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Connect an external monitor / display to your laptop to see if your laptop's display is faulty.

If faulty, it is the display's backlight or inverter board.

If you were experiencing discoloration in the screen (pinkish lower light hues) before it failed, that would indicate a CCFL backlight issue. If the screen suddenly went dim rather than a slow degradation, the inverter would be indicated.

In either case, a technician in your area should be able to help. Evaluate to see if the repair is cost-effective.

Hope this helps.

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can you see anything on the screen at all? Look very closely at the screen from different angles under a strong light and see if you can see a faint image on it. If you do it means the back-light is not turning on which is usually a failed inverter board (cheap and easy fix). If you can't see anything at all on the screen then either the cable is not seated properly or is bad (not very common) or the screen itself went out (more expensive repair)

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To give you an idea:
  • the backlight are CCF lamps (cold cathode florescent). Due to size/ design, they are roughly 2mm in diameter and length spans the width of the display area, they are often shielded/supported by a similar length J bar/bracket both for reflective purpose and structural support. If on the instance the lid was closed with an object obstructing, then it is very possible that the lamp was broken. This could be visually verified once the display panel is exposed;
  • the inverter is basically a DC to AC converter. It takes in the supply DCV of the laptop and converts this DCV to high frequency high voltage supply to power the CCF lamps. Often the inverter is an elongated PCB with a HF transformer at one end that immediately goes to the CCF lamps through a 2wire connector. The inverter could be electrically checked with the use of an ACV meter.
  • Both are readily available online.
  • It is often more of a challenge opening the two halves of the lid than determining the fault;
  • In some instances, dried up/blistered capacitors can cause no oscillation (hence no HF/HV output);
  • there are also instances where it is the flat cable that might have been stretched and therefore power is not available to the inverter;
  • since the inverter's output is HF/HV, pls treat it like the flyback of a small TV.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

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Blank screen

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