Loosen the two #0 Phillips 4.2 mm-length screws located at the top of the back cover.
The screws have locking washers that prevent the screws from falling off of the back cover. Leave these locking washers on the screws; it is not necessary to remove the washers for this repair guide.
Make sure the SD card has been removed. With a plastic opening tool pry off the lower case starting at the bottom edge and working around the perimeter.
Two ribbon cables connect the case to the circuit board. Be careful to not pull the case too hard and rip the ribbon cables.
Using a plastic opening tool pop off the circle pad joystick.
Do not use excessive force with the plastic opening tool. There is a ribbon attaching the circle pad joystick to the motherboard that will remain attached.
There is a loose washer located in between the circle pad joystick and the circle pad. Use caution and do not lose this piece.
Position the device such that the game cartridge slot is located at the top.
Locate the IR board located on the upper right side of the motherboard.
The IR board is installed upside-down in these photos by mistake. Installing it this way will result in your DS failing to start. Note the orientation of your IR board before you remove it, and reinstall it the same way.
Remove the IR board with a plastic opening tool by inserting the tool below the IR board and gently prying up.
Using a plastic opening tool, pry off the Wi-Fi board.
The Wi-Fi board will still be connected by a wire and it is not necessary to completely remove it for this step. Simply place it out of the way for this step.
Very detailed and easy to use step by step thanks. However, after reassembly after I switch the power button on it starts and then a flash and it trips out? Obviously a fault somewhere but not sure where to start.? Any thoughts appreciated.
That's to do with a part this tutorial skips: you need to put some insulation between the new screen and the motherboard. That's what that orange film is on the back of the screen in the photos. When replacing, you can easily (carefully) remove that film and stick it onto the back of the new screen, no problem. Or you can put some other sort of adhesive to create some insulation between the screen and motherboard. Hope this helps.