How do i replace a toshiba qosmio f45-av411 lcd

You can buy LCD screens on the Internet, I purchase parts from LCD Parts, they also service/repair and have DIY info.
Use this link to their WEB site :-
www.lcdparts.net

This for the lcd replacement...regardless of cause this will give you the simple steps.

http://www.laptoprepair101.com/laptop/2007/02/03/repair-notebook-lcd-screen/

You replaced the broken LCD screen in your laptop with a new screen. 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.

Her is some instructions to follow.

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 LCD's 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 back light.
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 back light inside the old screen lights up, apparently the new screen has defective back light lamp and has to be replaced.

Thanks for using fixya. Hope it is helpful for you.

Good luck
PCmania

FRo most laptop parts I tend to use Ebay

The link should take you to a search I already did for your screen

First remove the battery from te laptop. Locate all the screw covers (in the front side) with the watch maker screen driver. There might be four of them. Once you remove the screw. covers, remove the screws and remove the front bezel. You can now separate eh front bezel. Locate the screen assembly. Remember, there might be laches. So, be careful not to break them. You will see the frame scrwes after this with the vedio cable quite visible. Just remove them to find the invertor. Thats it.. You have removed the LCD screen.

Hope this helps.

Regards,
Hari