m7700 display issue

hello. i have posted this before but the problem was not fixed so i thought i would ask again maybe someone else might be able to help this time around.

i have :
changed the lcd
circuit board to the lcd
all wires connected to the lcd
tested with external display (displayed perfect)

to explain the issue in a short sentence, the connection to the lcd is messing up somewhere, apparently it is nothing swappable, so since the external monitor will display and the integrated lcd will not display, is this problem fixable? i am thinking it may be a cap on something on the motherboard going out. thanks for the help.

Martin

 

Have you tried another mobo?

 

K-Tron is probably the best to help you troubleshoot this.

But from what I heard it might be the connector from the motherboard to the LCD.
... K-Tron recently had issues with his internal LCD and thought it was his videocard/motherboard.... then he physically examined the connector for the LCD on his motherboard and found it was not seated properly (either the one of the tiny wires or the pins were not proper), so he adjusted them carefully to by seated secured in the connector and it fixed the issue.

 

Martin,
remove the keyboard of your system, and than remove the black plastic bezel piece. Underneath you will see all of the LCD connections. Their is a large connector. I think it is a 28 pin connector. This is primary for the LCD. It is the largest of the ones here. As Gophn mentioned, I had problems with mine, where I had green artifacting appearing everywhere. One of the wires in the actual plastic boot of the connector, which fits into the motherboard socket was loose. It was practically out of the boot. This caused green pixels to appear all over my screen. While the system is on, carefully, and I mean carefully use something with a blunt plastic point, something like a pen cap, and use it to push the wires all of the way into the socket. This will ensure a good connection. Try this, you should be able to get a signal.

Their is also an about 8-10 pin wire which goes to the inverter. You should make sure that it is properly connected to the motherboard.
their should also be a 4 pin wire for the webcam, but that is not important.

If you still do not get it going, unplug the input wire to the inverter. Plug a voltmeter into the two wires, and see if you are getting any power. You should get 19.76 Volts DC.
If you do not get any power, than the inverter power circuit on your motherboard may be damaged.
If you do get 19 volts than test the other end of the inverter. You should get a very large output, like 1200 V AC.
If you get nothing coming out of the inverter, the inverter is dead.

K-TRON

 

Sorry to hear you are having problems with your system. If your machine is out of warranty, you may check the following link for parts for your 7700 notebook. As K-Tron explained, it could be the inverter. Let us know.

 

i have tried most of that, but when the screen is black, it still has the backlight glowing, i have switched out the lcd's, and the inverter, and the cables, and it still does the same thing, and the strangest part of all is that after it sits on for a while, the lcd will come back on. but then later it will go back off. i dont understand.

Martin

 

What you just said is interesting, that rules out software or connection problems.
It seems like you have a hardware problem on your motherboard.

Have you taken the board out of your system to see if anything has fried?
I can take pictures of my D900K board I have lying around if anything on yours looks suspicious.

K-TRON

 

sounds good, take some screenshots and i will work on taking it apart later. thanks.

Martin

 

Martin, I sent you images of the entire board

I will post links here:
I have 227mb of images of the 72 pictures

this link brings up a ZIP file of the entire set of full motherboard images
http://rapidshare.com/files/215380325/Entire_board.zip.html

this link brings up a ZIP file of the images of the CPU side of the motherboard
http://rapidshare.com/files/215386055/Side_1.zip.html

this link brings up a ZIP file of the images of the chipset/keyboard facing side of the motherboard
http://rapidshare.com/files/215393680/Side_2.zip.html

I hope this helps, they may take a while to download
If you need any better images, or more specific ones let me know. I have a few D900K boards lying out in the open which are easy to get a hold of for images

K-TRON

 

Hello guys I also have a similar problem to the mentioned issue. The display on my Aurora m7700 is blank yet the backlight to the display is on. The display is perfect on a external monitor. I'm really a bit confusted as to the cause.

 

Hello K-TRON, how do you get the pen cap to actually push the wires into the socket, do you do it wire by wire?