The display on my laptop is very dark. If I hold the screen in enough light I can see some outlines. I hooked a LCD monitor to the laptop and it works fine with the monitor. I tryed to lighten up the screen with the buttons on the keyboard without any luck. What should I do next? Thanks.
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Re: Compaq Persario V2000 Black (very dark) Display
The problem you have is related to the power inverts that powers on a small fluorescent light on the bottom of the actual LCD pannel. The "display" is composed of mainly 2 parts. One is the TFT active matrix that is build up by using many transistors. There are 3 of them for each pixel, each transistor displaying one basic color (RGB code red-green-blue) and 3 of them, like i said, forming a single pixel. They don't produce light by themselves they only filter the light that pass through the TFT pannel. So if a transistor displays "green" it will do that by filtering the light that comes from the fluorescent lamp i was talking before. It produces white light so therefore the transistor pannel will filter the coresponding wave lenght to block anything else than "green". (white light is a combination of all spectrum lenghts)
Therefore in your case, if you light up the display using an external light, you may see something on it because the pannel will try to filter the light you give to it. This shows that the actual transistor matrix is working.
Your problem is like i said, related with the power inverter. It'a small device inside your laptop that will raise the tension given by the batteries to about 2-3000volts needed to fire up the fluorescent light (some kind of "neon"). If it doesn't work that light woun't come on and the display woun't light up therefore the transistors on the pannel woun't have anything to filter and display on the screen.
This problem can happen because of either a faulty connection between the inverter and the fluorescent lamp, or the inverter to the mainboard. Another cause can be the hardware failure of the actual inverter that is preventing it to raise the tension to the specified values. Either of these will require you to have your laptop checked at a service center because we are talking about tensions ranging 2-3000Volts and sensible component. This shouldn't be an expensive repair because the actual pannel (the screen) is working fine and all that needs to be done is to check the inverter or replace some components relating to it.
If you have further questions please feel free to reply to this. Good luck.
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When I opened my laptop this morning my computer won't come on. The screen is totally black. I took out the battery and put it back in ---- still nothing. I plugged it in with the power cord --- nothing! What is wrong with my HP Compaq Presario CQ60?
You may have a defective CCFL backlight, it may have the following symptom: Screen flashes on and off or displays reddish pink hue. Picture stays on in red and slowly be come normal. Picture flickering with dim display or appear black. Picture flickers on and off. All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replace the CCFL lamp. Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight. It could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out, this is the most likely case. The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills. Check out LCD Parts for service, parts, and DIY info Use this link to their WEB site :- www.lcdparts.net
no its not a driver you have a video chip getting ready to fail.on the v2000 it intergrated in to the mother board. soon you will be joining many other compaq v2000 and m2000 owners in the search for a mother board compaq has updated part numbers it a whole differant board for these units due to having a common failure rate of the original mother boards.Compaq know there was a over heating of the video chip that leads to failure but has not offered any assistance to there customers. [email protected]
Press F2 or Del key to get into Bois settings. Reset it to defaults by pressing F7 or look for the option on top of the window. F10 save & exit. See if it works.. otherwise try windows repair/reinstall
Have you try external monitor? If it's still same, the LCD screen back light or the inverter of the LCD screen was faulty, but yours most likely the inventor of the LCD screen was faulty, it's only can be repaired by components level tech.
If you are unable to change the contrast with the 'fn' key and the brightness controls, usually represented in the top row of keys as a sun icons, one brightens, one dims. You may have a bad brightness/contrast inverter in your display. It's a small circuit board in the display that controls the brightness. They do fail. You can find them for most models but depending on your technical ability, they can be a little tricky to change.