I had noticed there was an abundance of directions for every laptop BUT the 900HA. So, looking at jkkmobile's directions and a slather of youtube things, I proceeded to realize that the only place to put the controller was in the ram area, as asus decided to put other things where you could have fit it in more easily.
DISCLAIMER: I have VERY LITTLE KNOWLEDGE ON COMPUTER THINGS! I ONLY SAW THAT SOMEONE HAD A TOUCHSCREEN ON SOME KIND OF ASUS EEE PC AND THOUGHT 'HOLY COW I NEED ONE OF THOSE!!!!' AND WENT AHEAD TO DO IT. SOME THINGS I DO MIGHT BE VERY STUPID SO IF YOU FOLLOW THESE DIRECTIONS I TAKE NO RESPONSIBILITY FOR TURNING YOUR LAPTOP INTO A PAPERWEIGHT/DOORSTOP. Oh and this will void your warranty once you break the sticker. Don't bother trying to take it apart gently, it basically dissolves the second you touch it, as though you'd stolen your laptop's virginity. Once you lose it you can't gain it back. So make sure you really want to make this intimate relationship happen with your laptop.
AGAIN: The controller chip installation WILL void your warranty, unless you make EVERYTHING external (actually now that I think about it, that would've been a good idea) so make sure you're willing to do this. However, I managed to get it installed easily with only two tools and some tape. No soldering necessary, but I guess it can be recommended.
-Small + screwdriver.
-Plastic card (eg credit card- I used one stolen from a hotel in japan-shhh)
-Tape (electrical and scotch)
-Solderless touchscreen kit (I got mine from DealExtreme for 56 dollars. Mine was shipped well packaged, for those of you who are worried about shipping a piece of glass across the world)
WARNING: READ THROUGH ALL THE DIRECTIONS FULLY BEFORE STARTING! MAKE SURE YOU UNDERSTAND WHAT TO DO BEFORE DOING IT! ETC!
[NOTE- Just so you know, the layout will be photo+directions for that particular photo.]
So, the first thing you will want to do is to bid your 900HA a preemptive farewell, shut it down and take out the battery. Set it aside.
There are ten screws from the bottom you will want to remove. Six are for the case, four are for the cover. Place these in a little bowl; they are all the same size so it does not matter much about the order.
Remove the plastic cover. This will expose your harddrive and RAM bay. Use the black tab to remove your harddrive; set it aside. When you are done with the entire thing, your controller will look like this:
Removing the harddrive will have exposed one black screw. Remove and place in bowl.
Flip the laptop over. You will now want to remove the keyboard. With the card, release the keyboard by shoving the metal clips between Pause/Break and Prt Sc, on F7, and between F1/F2. This should be easy- as you release the clips, use your fingernails to keep the keyboard from falling back in place. DO NOT PULL THE KEYBOARD AWAY YET- LIFT the top part up! You will remove the ribbon next.
Using your screw driver, look for these tiny black clip things on the side of the ribbon. There should be a small groove in each one. Stick the point of the screwdriver into there and push outwards on both sides. This should release your ribbon and you can pull it out with NO effort. If it still won't come out, move the black piece further out.
You will want to do the same step with the touchpad. This time the clasp is white, so you will want to push out the white. Once it's released, grab the blue tab and slide the ribbon out. Now you will be able to remove the top casing from the mobo.
The next few photos will show you the 'key' components for releasing the top part of the case easily. First, remove all the screws. The one at the bottom center rightish was inserted from the back (that's the screw you remove that is under the harddrive. Your motherboard and screen are locked in place if you forgot about that) All the screws can go in the same bowl with the others.
Close the cover. The inside hinges need to be released. I found it's easiest to stick your fingers into the crack and lift up until you hear a 'pop' noise where the clasp breaks free. Do it to both sides, then open the cover up again.
Repeat the finger lifting technique with the microphone/speaker jacks, you will want to lift the plastic over the two jacks. Then run the cart under the touchscreen area, and the back. The whole top part should come off.
From here, you will be able to remove the top bezel layer to install your touchscreen. But for now, let's continue on with the controller installation.
Here's the webcam internal USB thing. You'll be plugging your controller into here, and then your webcam into your controller. However, the wires cause the keyboard to bulge upwards, so I decided to run the wires under the motherboard. To do this, you'll have to free the mobo. There are two screws to the left of the intel chip. Remove these and put in a separate bowl- they are longer screws.
Next up, you'll want to release the speaker usb thingie. A little bit of pressure should release it. You'll also notice a little clip that's holding the mobo secure. There's one on the other side; move these two and your mobo will be almost free.
The mobo's vga port thing will make it a little difficult to move out. I bent the outer part out enough for me to squeeze the vga connector thing out of the hole, and then the whole mobo was free for me to lift up. If you want to move it out of the way completely, you'll nee to unplug the fan usb thing up at the top. It's in the photo below, the one I'm not pointing to. The one I'm pointing to is the webcam one.
NOTE- The next part the photos may not show EXACTLY what to do as I still need to get replacement wires to complete the mod.
Here's the area under the mobo. You'll see the wires running around with the controller chip down where the RAM bay is. Ignore the wire going to the right. I was using that earlier to supply power from an external usb hub.
You will have three wires running through this area.
1) webcam - This will go UNDER the fan. (From the direction the wire will be coming from it makes sense I think)
2) touchscreen - This will go to the SIDE of the fan.
3) power for the controller chip - This will go to the SIDE of the fan.
This photo shows the wire placement. Note the space under the fan for the webcam wire cable thing.
Make sure your wire lengths are appropriate and will reach the controller easily. Do not worry about excess wire, as long as you don't have ten extra feet of it it'll all fit inside the ram bay comfortably. Just make sure you run them in the hollows of the laptop, so no going over the harddrive enclosure or the speaker- run them between! Use electrical tape to secure them once you're satisfied.
Your webcam connector will have to go below your mobo else you'll have bulges. You can move the plastic joint through the space between the mobo and the side of the case. Best place for me was between the ethernet port and the usb. Add some electricity tape to the edge of the mobo for cushioning in case anything happens. Those wires are awfully thin...
In this photo you can see the ribbon from the touchscreen. Not wanting to completely destroy it, I added a layer of scotch tape on top, as it will be squeezed between your mobo and the power plug in order to make it under your motherboard. The space is tight, so make sure you have it running properly straight through. Rotate the cover a bit to make sure no pinching or stretching occurs.
Now, you'll want to take the wire supplying the power to the USB and plug it into the port that the webcam used to be. You see where the wire for the fan goes? You'll use that to get your wires underneath the mobo. So direct it over, add some electricity tape and fix it in between the fan and the hd enclosure bay.
Now you should have all your cables properly wired through the bottom of your mobo and sticking out of your ram bay. Put down the top of the mobo (make sure none of the wires are in the way of the screw holes, the white wire on the right side kept getting in the way. You don't want to pinch those..) Plug them into your controller and make sure you can insert the controller into your RAM bay pretty easily. Wires can squish into the side or just on top. (For protection, add a layer of electrical tape between the RAM and the controller chip!)
If it works, great! If not, well...
Now, to test, rebuild the laptop without any of the screws. If the touchscreen works, awesome. Shut down, and screw everything in. If not, figure out what you did wrong :P
To close, put the mobo back in place. Everything should be flush. Make sure the power jack is flush with the hole in the plastic cover-it was the best indication for me to see that everything was in order. Clip down the clips at the bottom, then add the two screws. It's easiest starting with getting the vga port in first, then working the rest in as you go. CAREFUL WITH THE TOUCHSCREEN RIBBON HERE! Also, on the right joint, the black and white wires.
Make sure this weird tape thing isn't in the way. It'll really hamper your efforts to get your mobo secured :P Notice how frayed mine is. I took apart the mobo at least twenty times this weekend.
Once your mobo is secured, put the top cover on. Insert the touchscreen ribbon (make sure it goes in all the way) then secure it. Do the same with your keyboard, and lock down the clasps. The keyboard should clip down easily, no bulges. If the three clips don't clip on with a light press, you have a wire in the way somewhere underneath the cover. Tough luck- go back.
Close the lid, and flip the laptop over. Insert the screw into the bay, tighten.
When reinserting the harddrive, make sure you get this metal clip into the little notch cut out for it. If not, your plastic cover will bulge and it'll look ugly.
Get your controller all nestled in neatly. Tuck any wires away, make sure the connections are firm. Close up the case and put in the four screws! Oh yeah, and the six for the cover. This'll secure everything in place.
Lastly, add the battery and turn it on!
Check your laptop. There shouldn't be any obvious bulging. Well, the center hinge is a little fat from the touchscreen, but that's okay.
Your laptop should turn back on. Smile at it, and say "success!"
Top part forthcoming. No pictures cause I didn't take any when I added it, and I don't feel like taking off the touchscreen just to put it back on :P
Hope this helps.
Edited by argentum, 02 February 2009 - 11:23 PM.