You replaced the broken LCD screen in your laptop with a new screen but it’s not working. Does this sound like your problem? Let’s find out what could be wrong and how you can fix it.
First of all, I assume that your new LCD screen is compatible with the old one. Different screens require different video cables. Make sure you new screen is compatible with your laptop.
OK, let’s say you accidentally damaged the LCD screen in your laptop. A part of the screen still works fine but you cannot use it like that so you decided to replace the screen yourself. You can find LCD replacement instructions in service manuals or this DIY site.
You did some research and purchased a compatible screen, installed it into the laptop, turned it on and… The new screen is not working!!! What could be wrong?
Before you start to panic, check all cable connections again. Check connection between the video cable, LCD screen and inverter board. Reconnect cables just in case.
Take a closer look at the connection between the video cable and LCD screen. It’s possible you accidentally pulled the video cable from the connector during the screen installation.
The video cable has to be seated properly, all the way down.
Also, on some older LCD screens there are very thin pins inside the connector. Take a look inside the connector, make sure there are no damaged (bent) pins.
You can straighten bent pins with a very small screwdriver but this procedure requires a lot of patience and concentration.
Fortunately, most newer LCDs have a different type of connector, without fragile pins inside.
OK, you have reseated all connectors and cannot see anything wrong but the new screen still is not working. What’s next?
Remove the new screen and connect the old one. If the old one works properly (except the damaged area) but the new one is dead, apparently the new screen is defective and has to be replaced. Hopefully it has warranty.
Here’s another scenario. The new screen kinda works. You can see a very faint image but there is no backlight.
If that’s the case, disconnect the new screen from the inverter board and plug in the old screen instead, as it shown on the picture below. If the backlight inside the old screen lights up, apparently the new screen has defective backlight lamp and has to be replaced.
Related post: Laptop has bad video on the LCD screen. What is wrong?
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March 4th, 2010 at 9:30 am
Excellent doc, i had similar problem with my laptop and rectified the same.
Thanks for nice work!!
Cheers
February 11th, 2010 at 12:01 am
remark,
Make sure the video cable is plugged correctly into the LCD screen. Try reconnecting the video cable just in case.
February 6th, 2010 at 2:56 am
I have a problem.Seller where I buy a LCD(LTN170WX) said that it is full compatilble with my old(LTN170WA-L01).But after replace exist only backlight,no imagr.What is the problem,incompatible LCD? Or something else?
Say me please,WX have anothe PINs in connector as WA model?
Have you a circuit diagram of both of connectors of this two LCDs?
I would be very grateful .
January 23rd, 2010 at 12:34 pm
I’m having similar issues with my Dell Vostro 1500. I had the 1280×800 resolution screen, but my kids cracked it so I ordered one and it came yesterday. I took the old screen out and unpacked the new screen and have the exact same problem y’all are seeing. The new screen has no mounting holes for the inverter bracket at the bottom and upper screen to back plate bracket at the top. Both of these brackets are screwed onto the screen.
I installed it loose and booted the computer. I got 8 Dell Windows staring back at me, then 8 Windows 7 boot ups then everything goes blank. I re-hooked up the old screen and it works just fine so it’s not the cable. I also tried the new inverter that came with the screen and the problem still followed the screen.
The OEM screen is a Chunghwa CLAA154WB08A. The new one that I got was a Chi Mei N154I5-L01
January 17th, 2010 at 12:38 pm
hp compaq nc6000 lags on boot up i have to tap wireless card slot on bottom to boot.any ideas
January 11th, 2010 at 8:07 am
Hi,
I replaced my dell 17″ WUXGA with WXGA (sharp to LG ) and I used my original inverter board.
It works only while it boots and in safe mode (in safe mode it loads standard VGA drivers). If it loads full Nvidia drivers for my go7900gs it looks its on but doesn’t show anything. I tired extending it onto my TV and it works fine on TV but nothing on LCD screen.
it seems that graphic drivers or graphic bios is blocking the new screen. I also read somewhere that all manufacturers block screens that are not for their line of laptops through bios but i cannot confirm it.
Can anyone help please.
thx in advance
p.s. windows are not the issues since i reinstalled them (win7 ultimate) and LCD screen works while installing but as soon as I update graphic driver it only works on TV or external monitor)
December 28th, 2009 at 7:15 am
Hello,
I replaced my laptop screen and now the computer has no power at all and wont even come on. I reconnected the battery and on my ac adapter the light is on until I plug it into the computer and then it goes off. I checked to make sure all connection where good and everything looked good. I even tried my old one and now it wont work??
December 7th, 2009 at 8:22 am
hi can i ask you about my laptop? when i turn it on it was all black screen but when i connect it to monitor it has image but the image is like damage and you can barely read whats in it. please reply as soon as possible. thanks so much..
December 2nd, 2009 at 12:58 pm
i got your site incredible
November 29th, 2009 at 2:33 pm
Keith,
It’s hard to tell what is causing the problem.
It looks like you are getting different failures with two different screens. I guess it’s possible that LCD screens you are getting are not compatible with the laptop somehow, or maybe they require a different video cable.