If you have a used laptop and you don't own any idea what brand or model it can be, you could be in for a lot of trouble if it starts off to malfunction. Hardware problems can be hugely troublesome, because you are not aware of where to go just for replacement parts. If the problem is a keyboard that they are replaced, you'll probably suffer a small number of pounding headaches before you choose the best one to fit ones laptop. The good thing about headaches is how they always go away, and they're going to when you find the perfect Compaq Presario A900 CTO Key board. InstructionsThings You'll Need: Phillips-head screwdriver Small vinyl wedge or flat-head screwdriver Action 1 Power down the computer and remove all of the external devices that usually are attached, and then remove the battery. To remove the battery on most laptops, you'll just push your release tab and pull the battery straight from the connectors, but with some you have to remove screws. You'll know what you can do once you get all set to disconnect the battery. Step 2 Open the laptop significantly as it will open and have a very small plastic wedge or perhaps flat-head screwdriver to gently pry the end of the bezel (the platter directly above the keyboard). You'll pry from the notch in the top-right corner on the keyboard, and then pull another side off with a hand. Some laptop bezels will be secured by screws at the bottom of the personal computer, so if you find this that they are the case for your business opportunity, just flip the laptop over and get rid of the screws, and then turn it over again to eliminate the bezel. Step 3 Remove the screws that secure any Compaq Presario A900 CTO Keyboard towards laptop. Don't pull this keyboard off yet, because it's still belonging to the motherboard by a set cable. Flip the keyboard during the palm rest. Step 4 Disconnect that flat cable and pull off the keyboard. Now that you've removed the keyboard, you can take it with you when you attend get a replacement key-board. Step 5 Request some Compaq Presario A900 CTO Keyboard match after you arrive at where you're going to get a keyboard. The attendent may can help you match up the screw holes and how big the keyboard so you've got the best chances of determining the right one. Once you earn your purchase, save your receipt and don't do too much marring the packaging when beginning it, just in case it's important to take the keyboard back given it isn't the right compliment. Tips & WarningsYou can search for serial numbers and manufacturer information on the underside of that keyboard and enter your findings with the search bar on line. This may speed up your visit a replacement keyboard. Gateway MX3610 Keyboard(Color: Charcoal Status: Genuine and Completely new! )Compaq Presario A909 Keyboard(Color: Charcoal Status: Genuine and completely new! )Sony VGN-FE690 Keyboard(Color: Vivid white Status: Genuine and completely new! )Compaq Presario M2000 Keyboard(Laptop key board for Compaq )