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Re: Reseating Touch Screen Ribbon Cables
The cable for the touchscreen is one with 4 conductors that connect directly to the overlay on the face of the LCD. The flat ribbon connector on the main board is quite delicate. The three connectors for the bottom screen are on the right side of the component side of the DS phat board. The touchscreen is labeled P6. On the DS Lite, the connector is closer to the R button.
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C350,351,450,252,352..: remove the panel, try carefully moving and reseating the ribbon cables.. the 4 wire one is your best shot..: by pulling up on the black locking slider with your fingernails, them moving the ribbon a bit , reseat it and while holding it in, push the black lock back in.. The larger ribbon has a very delicate brown clip that can be judiciously un-clipped by pulling it up at the center with (again) your fingernail !!gently!! follow the above steps and while holding the ribbon in, re-clip the brown lock. 10-20% chance this will work.. if not, the touch screen (now modified) need replacing.
In my case, it was just that one of the ribbon cables under the screen was disconnected. I just removed the two screws near the dock connector, and carefully lifted the screen with a suction cup... actually used a shaving mirror :-). I reseated the ribbon connectors, and voila, it works again.
either a fuse has gone or the screen is sorting out on the motherboard. check youtube for instructions on how to fix fuses, or if you have had a new screen put some insulation tape on the back of it. Other possible causes can be a fault with the top screen so investigate tat too. the ribbon cables can tear
This is a common problem, if you are lucky you simply have not connected up or clipped back in the touch screen cable into its socket properly (connector is numbered P6 on the motherboard) the small ribbon type cable plugs into it. If you are not lucky, like moi, you have broken the flip up part of the connector, but this whole part can be replaced from as little $1 (US dollar), perform the following keyword search on ebay:
"Touch Screen Connector P6 For Nintendo DS Lite NDSL"
however the connector has to be soldered onto the motherboard, obviously you would have to unsolder and remove the old connector, if you have soldering experience, its a trivial task, if you cannot solder it yourself, you could always ask someone who can do it for you. If successfull you could save yourself having to fork out for a new DS lite! Good Luck!
You have damaged the ribbon or dislodged the clip that is connecting the top screen to the motherboard in the lower part of the DS.
Open up the lower section and check the clip (see youtube for instructions on how to do this) if reseating the ribbon in the clip doesn't solve it you will have to purchase a new top screen as the ribbon has gotten damaged. (screens can be got cheaply on eBay)
If it is under warranty send it back to Nintendo to fix.
double check that both cable/ribbons are connected properly to the motherboard, the small thin ribbon which curls over the top of the motherboard is the one which powers and reads the touch screen so double check this!!
if this is all in fine then im sorry to say your touch screen is broken and will need replacing!
Unfortunately, pixel thin lines are usually failures of the actual panel. If you can touch it and effect the problem, it depends on where. If it is in the middle of screen or away from the edge, you have broken connections on the TFT layer of the lcd panel.. meaning you need a new lcd panel. If you touch near the edge to effect, it is possible that the ribbon cable inside the lcd panel could be reseated to resolve. Opening the tv is one thing, but opening the lcd panel is another, its quite tricky and dust can get in between the layers. Only attempt if you have good disassembly skills and some compressed air to keep the dust out of there. The ribbon cables are very fragile and repairing by reseating is a hopeful but unlikely solution. A new lcd panel costs about as much as a new tv. Might just live with the issue or use as a tv for the kids.
You can't buy a ribbon for the bottom screen. (You can buy the ribbon that connects the motherboard to the daughter board which connects the top screen.). A new screen is the answer but be very careful when taking off the touch screen. Gently pry the two screens apart or else you will need a new touch screen. Also make a note of how the touch screen is attached to the LCD screen, as the touch screen is not the same size as the LCD screen. How have you damaged the ribbon? Could it be that it may not be pushed tight and straight into the connector? BTW the top and bottom LCD screens are the same. Some unscrupulous dealers have been charging differing amounts for 'Top' or 'Bottom' screens!