Lines show up on my screen when i open to full keyboard. the front keyboard and screen still work. but its just when i open to full keyboard it wants to just show lines on my screen. i cant see anythi

If you're talking about Windows maybe you need to just expand the screen try hitting control button on the keyboard and the + symbol i bet that works to enlarge the screen

I suspect you'll need to replace the screen, but to be sure you should contact Yamaha customer service and go over the problem with them.
Digital Pianos Keyboards Guitars Drums Live Sound and Music Production...

Try to change brightness

between keyboard and screen edge is a ribbon cable that might be loose or worse cracking have a qualified tech look into this

use the on screen keyboard in xp go to all program then accessories then accessibility then open on screen keyboard
in win 7 got all program then accessories then ease of access then open on screen keyboard
there u can use full keyboard.

1) Remove ALL electrical sources.
AC adapter and Battery. Leave the Battery Compartment Door off.

2) Laptop closed turn it over, battery compartment facing Away from you.

3) Looking at the inside edge of the Battery Compartment that is towards you, there are 3 screws to remove.
They are right along the edge that faces you.
There is one in the middle, and one on the right side, that are down in a little indention. (A small drop in the case)
There is one to the left.
Philips head screws. Remove them, place them in a multi-compartment container, and mark the compartment for where they came from.

(DO NOT mix the screws up that you are going to remove)

4) Turn the laptop over, open it.
Carefully lift the Front of the Keyboard up to an angle. (The Front of the Keyboard faces the LCD screen)
DO NOT lift it straight up.

There are plastic tabs that protrude from the back of the Keyboard, and go into the Keyboard Cover.
(The dark rectangular shaped piece of plastic that surrounds the Keyboard, and ends at the Palm Rest, is the Keyboard Cover)

Ease the Keyboard forward towards the LCD screen. Lay it down next to the LCD screen, and on the Keyboard Cover.
You want to be able to access the Keyboard cable's connector.

The Keyboard cable connector is the white connector in the middle, with the ribbon cable leading from it to the Keyboard.
This is a ZIF connector.
Zero Insertion Force.

The ZIF connector is made of two parts. It opens, but does NOT separate into two parts.
The white tabs you see on either side are eased towards the LCD screen.
Use your fingernails.
Push on one 'ear' a little, then go to the other side. Keep alternating back, and forth until the ZIF connector is open. It only opens up about 1/4 inch.

This action opens the ZIF connector, where the flat ribbon cable can be eased out of it.

(To reinstall, line the ribbon cable up in the connector, Insert it until it stops, then squeeze the white 'ears' towards the front of the laptop. {Towards you)

Use EXTREME care when opening, and closing the ZIF connector. If you break it you have to replace the motherboard.

Remove the Keyboard.

Regards
joecoolvette

I had this same problem, there is a thin line of wires connecting the bottom half and top half of the sliders, after awhile it just plain wears out and will generally crack, without these wire anything on the front of your phone will no longer work. The screen is black but stil lights up a little bit and occasionally the buttons light up but its pretty much toast I'm sorry to say. I upgraded to a HTC Touch Pro 2 and am happier than ever!

sounds like you have the l337speak virus. make a word document on another computer with this link: http://shop.trendmicro.com/trialpay/ just run the free online scan. you will have to let the site use your active-x, an option that you can click allow on at the top of your screen. you should also, goto http://www.java.com and install the most recent java before running the scan. open the word file on your computer having the typing issues, so you can click the link from opening the file. use a usb stick, burned cd, or transfer the word file to the computer over your network.

You don't have to take off the bottom.
You need to take off the panel right in front of the screen

1. Pop off the strip in front of the keyboard.
2. Unscrew the 3 screws.
3. pop off the panel that has the startup button on it.
4. Take the keyboard and put in the replacement.
5. To put it back together.

I brought the keyboard into a local service technician. He told me that he had to remove about 50 screws but the solution was simple. He unplugged and reconnected the ribbon connector. It apparently was not making good contact.