I did some research online and got the impression that a replacement LCD only needed the same screen size, resolution, and back-lighting type to be compatible. Is there more that determines compatibility than this?

In most cases it would be enough to make screen compatible. But in some cases you have to have exactly the same screen. I don’t know if this is true for your laptop.

I can’t get my laptop to recognize and use it unless I trick it into thinking that my OLD LCD is connected, which is not really feasible… having to boot up my computer with my OLD LCD and switch it to the NEW LCD everytime I want to use it. I don’t understand why it wont just accept my NEW LCD…it has the exact same specifications, made by the same manufacturer, just slightly different model numbers.

I think either your new screen is defective or it’s not 100% compatible with the video cable.

The problem is that only the top third of the replacement LCD screen works. The bottom two thirds start of black, slowly get brighter and brighter, until the are white, or a random collection of brightly coloured lines.
The top third works perfectly.

I am yet to try to see if it is a problem to do with the backlight or maybe some pins inside the screen’s connection (this laptop is around 5 years old).

This is not backlight or inverter related problem. That’s for sure.
You said new screens and cables didn’t fix the problem and external monitor works fine. This tells me that you might have a problem with the video connector on the motherboard.
Take a look inside the connector. Maybe you accidentally bent some pins while replacing the cable. This is just a guess.

The battery was unplugged, but there is a slight chance the ac adaptor was still plugged in. not sure.
What are the consequences of this mistake?

If the laptop was turned off during the LCD screen replacement, a plugged in AC adapter shouldn’t damage anything.

My LCD specs:
Model LP154w01(TL)(A9)
WXGA (1280×800) 15.4″ diagonal (13.1 x 8.2″)
CCFL 1-bulb

My replacement LCD from Ebay:
Model LP154W01(A3)(K1)
WXGA (1280×800) 15.4″ diagonal (13.1 x 8.2″)
CCFL 1-bulb

As far as I can see, it should work perfectly fine! It certainly did NOT! So I tested and verified that the NEW LCD does work, and it does! (I can post about how I did this, but it gets pretty long. I have it typed out if anyone cares to read it though) I can’t get my laptop to recognize and use it unless I trick it into thinking that my OLD LCD is connected, which is not really feasible… having to boot up my computer with my OLD LCD and switch it to the NEW LCD everytime I want to use it. I don’t understand why it wont just accept my NEW LCD…it has the exact same specifications, made by the same manufacturer, just slightly different model numbers. I updated the bios on my motherboard to the latest version from HP, but that didn’t help. I’m not a computer expert, and I don’t know much about computer programming, but I did read online that people have modified BIOS to overclock the CPU. I was thinking that maybe I could somehow modify and flash a new BIOS that includes support for this monitor. Does that sound possible? If so, could you help me do that? Or are there any other suggestions to make this work besides finding the exact LCD model to replace it with?

Any help is appreciated!

The title of this page describes the problem I’m having, but I have tried a whole array of different solutions, and still no success.

The problem is that only the top third of the replacement LCD screen works. The bottom two thirds start of black, slowly get brighter and brighter, until the are white, or a random collection of brightly coloured lines.
The top third works perfectly.

I am yet to try to see if it is a problem to do with the backlight or maybe some pins inside the screen’s connection (this laptop is around 5 years old).

But, and here’s the annoying part, I have used TWO replacement screens, FOUR different inverters and TWO different cables, but I get the exact same problem no matter which part I swap around.

I am thinking of plugging the old screen in to see if it has the same problem. The damage that was done to it involved many cracks spread out across it, but a small portion of the screen still worked.

Monitors work fine with the laptop. No problems other than some widescreen incompaitbilites (unsupported resolutions by monitors).

Any ideas or possible problems? This has me completely stumped, and I’m running into a lot of the same suggestions online because of the time spent trying to fix this.
Thanks a lot for the help you’ve provided already =)

Replaced a broken screen in a notebook but is doesn’t work. The old one showed with stripes and stuff, but when i put it in now, i get nothing, just like when i put the new one in. An external monitor works fine.
Did you make sure that your new screen is 100% compatible? Did you remove the laptop battery while replacing the screen?

Im sure the screen i compatible. The battery was unplugged, but there is a slight chance the ac adaptor was still plugged in. not sure.

What are the consequences of this mistake?

Replaced a broken screen in a notebook but is doesn’t work.
The old one showed with stripes and stuff, but when i put it in now, i get nothing, just like when i put the new one in.
An external monitor works fine.

Did you make sure that your new screen is 100% compatible? Did you remove the laptop battery while replacing the screen?

Replaced a broken screen in a notebook but is doesn’t work.
The old one showed with stripes and stuff, but when i put it in now, i get nothing, just like when i put the new one in.
An external monitor works fine.

I replaced both the screen and the cable.
Is it possible that the connector on the mainboard is the issue, or should i send the new monitor back as a DOA?
Cant be the videocard since an external monitor works like a charm.

Could use some help over here!

Thx in advance!

I managed to break one of the pins off the part with the lcd connects to the motherboard. Do you know what this part is called. Is it possible to get a replacement? Is it possible to repair?

One of the pins INSIDE the connector? I don’t think you can fix that.
Have you tried connecting the video cable to the connector at all? Maybe it will run even with the broken pin. It’s possible (if you are lucky) the broken pin is the ground pin or something like that. This is just a guess.

Eamonn