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Screen does not light up - PC Desktops

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  • mijoca1 Jun 13, 2008

    The same thing just happened to me this week. What did you end up doing?

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I just purchased a used HP Pavilion dv9000. I worked it before I left the shop. I got home (smooth ride), put it on my desk, hooked it up to AC, opened the lid, hit the powew switch (upper left side), and all the little blue lights come on (blink often), but the screen stays totally black, not lighting up. Whats up? The dealer was closing and said bring it back tomorrow, but I need it tonight! HELP

Posted on Apr 10, 2009

I have same problem. I tihnk you need to replace the screen as the tube has blown behind the screen. depending on the age of your computer, it may not be worth it. check out the cheep oldish laptops on ebay

Posted on May 05, 2008

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My hp lcd monitor screen is accidently suffered a pin hole. how to plug this pin hole to make screen normal and prevent white light from escaping from screen and read words on that part of screen which get...


LCD is Short for liquid crystal display, a type of display used in digital watches and many portable computers. LCD displays utilize two sheets of polarizing material with a liquid crystal solution between them. An electric current passed through the liquid causes the crystals to align so that light cannot pass through them. Each crystal, therefore, is like a shutter, either allowing light to pass through or blocking the light.

If you have a "hole" in it then you will most likely have to replace the display.

Aug 29, 2013 | HP PC Desktops

Tip

Monitor LCD Screen Replacement With A Laptop Screen


This tip is for the typical PC tech with a shop full of dead laptops and monitors, looking to make an extra Monitor for bench testing malfunctioning PC's. Maybe you're a tinkerer and just have some spare parts laying around, and want to make something cool and easy. Either way, this tip is a fun way to make old dead parts work for you, rather than sitting in a corner gathering dust.

Replacing a Laptop screen is pretty easy if you take it slow.
LCD Monitor screens are actually easy to replace too, if you are careful not to crack anything getting one out and in again.

This tip doesn't address any of the typical replacement methods.
What this does is show you how to use a laptop screen in a standard Desktop LCD monitor.

Having already disassembled your Desktop monitor, and determining that one or both of your backlights is dead, you will most likely begin searching for sources of a new one. Before you do that, try testing both backlights in the dead monitor screen first by hooking them, one at a time to an inverter in a working laptop to verify that both are dead.

Most of the time, you will discover that only one light is dead, and this is where the fun begins.

At this point, you have a few choices to make.

1. Extract a working backlight from a cracked LCD, we all have a few of those lying around somewhere in just about any PC tech area.
2. With the extracted backlight in hand and the old LCD screen still attached to the monitors electronics, remove either of the sets of wires going to one of your backlights, leaving one still attached.
3. Now you can attach the light you extracted to the empty socket your original screens light attached to, while leaving the other one still attached.
4, Now, turn on the monitor and wait for the extracted backlight to come on, if it doesn't switch it with the other light socket plugged to your screen, and plug the opposite light wire back in.

This will do 2 things for you. First, it will be a quick test of your inverter, and second it will verify that you do or don't have at least one working backlight still functioning in your monitor.

Remember that with most LCD monitors, just one backlight can provide enough illumination for your screen to show a very crisp picture.
The problem appears though, when we decide that our existing LCD is dead because we dont see it light up.

The solution for this is to simply disconnect the dead light wire from the existing inverter plug leading to the LCD screen, then replacing that with a working light from the cracked screen without disassembling the LCD screen itself. If you did everything right, your old dead screen will be working as it should. Be sure you swap the backlight connecting wires so that your Bright/Dim controls work as they did before.

You see, most dual light inverters work the same as a standard twin tube household flourescent light. When one goes out, they both eventually stop working. So, adding that second light completes the circuit, then swapping light socket connectors turns your backup light tube into the primary light, instead of the secondary.

Now, if THAT trick didn't work, you can move on to the Laptop LCD trick, which is pretty much what you did before, except that the Laptop LCD usually only has 1 light tube. So for this to work, you can complete the lighting circuit by simply adding your spare backlight tube to the second open backlight connector, then installing the LCD to your monitor.

Many of these Laptop LCD screens are the same height and width as comparable Desktop screens, but they are also thinner, and will have to be glued or taped to the frame from the inside. Everything else connects exactly as the original screen, but may need to have wire added to the Laptop backlight wire so it reaches the power source.

I figured this tip was worth posting, since I just did this trick with a 15" polaroid HDTV/HDMI/HiDef Television/Monitor combo.
The model I have died a few months after it was bought new from Walmart, and the customer just didn't feel like paying $129 for a new screen.
Being the packrat I am, I just couldn't bear throwing it away, figuring that some day I would find a matching screen. As you can see, I got tired of waiting. The pictures of my project are below.

dc79966.jpg2e21d78.jpg

That bright line of light isn't the flash from my Camera, it's the flourescent light tube from a broken LCD screen placed on top of the steel housing.
The incidental effect of that light is that my back wall is a nice nitelite, and hooking up new components is a lot easier. Yes I could have blacked it out, but I think I like the added light behind the TV.

I hope this Tip comes in handy for you.

Bob S.

on Apr 08, 2010 | PC Desktops

1 Answer

Red light flashes blank screen


I have the same problem on 2 of my IP's - did you manage to sort it out?

Mar 27, 2013 | Saitek Pro Flight Instrument Panel...

1 Answer

My monitor screen is black. The green light is on but black screen


The green light usually indicates that the monitor is getting a signal.
The lack of a picture is an indication that the monitor itself is having a problem. I would test the signal with another monitor if you can get one.
I suspect that the monitor backlight has gone bad (if so, you can see the screen very faintly if you shine a light on it).
Or, the screen circuitry has gone bad.

Jun 30, 2011 | PC Desktops

1 Answer

Plzzz Help I have a Toshiba Satellite i dropped it but it ran perfect for 15 minutes or so them the screen went extremely dim. I assumed it was the screen so had one overnight installed that , still same...


Check the inverter again by connecting an external CCFL backlight from another screen that you know, works - see if the backlight lights up on any of the screens. If any one the screens light up then it's NOT the inverter. If one doesn't light, then the CCFL bulb is bad on it because you proved that the Inverter is good.

Nov 01, 2010 | PC Desktops

1 Answer

Brightnes not in screen


If the screen is dim it means the back light needs to be replaced. The back light is what lights up the screen so it is easy for you to read everything on it.

Sep 07, 2009 | Acer PC Desktops

1 Answer

Back light to light up screen on my packardbell lalptop does not light screen up but windows can vaguly be seen on model have i deleted the drivers by mistake or is it a hardware problem


Chances are, you have a screen inverter that needs to be replaced. Here is a website that can help you do just that.
http://www.laptoprepair101.com/laptop/2007/01/31/replace-screen-inverter-fix-backlight/

Or, if you have a pc repair shop near you, you might want to take it in and get a quote.
I hope this helps.

Nov 08, 2008 | Packard Bell PC Desktops

1 Answer

Startup


Black Screen shows memory counting which stops at 256 Mb [is correct] Hit F10 & screen says "Setup" in bottom right hand corner-screen is still black. Floppy Drive Bay green light staying on. Regards John

Jul 10, 2008 | Intel Compaq EVO D500 (RBMDTCPQP42400) PC...

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