David MacKay

Fixing the button bar connector

(see part 3 of the FAQ at http://www.geocities.com/SiliconValley/8130/faq.htm, UK faq site, local copy here
15.jpg ( 168 K) : Step one: battery compartment removed. If you are doing the button bar surgery, you should remove the backup battery, but you won't need to remove the main batteries. If you leave the batteries connected then during the surgery you may get strange bleeps and screen patterns happening, so it is probably best to disconnect them, unless your set-up takes a long time to restore.
16.jpg ( 168 K) : The battery connector released from its retaining tab, but not disconnected from the body.
17.jpg ( 176 K) : Rather uninteresting view when battery compartment removed.
01.jpg ( 200 K) : After removal of the keyboard cover. (I did this by lifting out the front, next to the space bar, first, then easing the back out.)
18.jpg ( 192 K) : Removing the keyboard cover.
19.jpg ( 160 K) and 20.jpg ( 168 K) : The back of the keyboard cover is held down by a total of six tabs; the edge ones point backwards and the centre ones hook downwards. This is why `considerable force' is needed at this point.
02.jpg ( 256 K) : After removal of the keys. When I removed the battery compartment, my button bar bowed out under the strain of the springs. I think it might have been a good idea to remove the springs. WARNING: When I proceeded with the surgery for the button bar, my left hinge broke.
09.jpg ( 240 K) : WARNING: when lifting up the keyboard cover, ONLY insert your tools in the dead centre, where there is a dimple in the circuit board. Preferably use a blunter plastic instrument. Notice I used a metal screwdriver, and at the tricky moment when lifting the keyboard cover's two prongs out, I scratched the circuit board underneath. No real damage done, but if I had been clumsier, it could have been terminal, I guess.
04.jpg ( 168 K) : WARNING: When I lifted the main circuit board, my port protector popped out. Maybe the FAQ could give advice on how to prevent it from so popping. My guess is it might help to tape the protector back, but I couldn't see how the spring fitted into things. I left this out when I reassembled. Here is a picture by mikehughes showing how the spring should be fitted - The right angled end fits into the small hole and the tiny "lip" on the plastic part hooks over the pcb. It forms a kind of "runner" to keep it on.
03.jpg ( 200 K) : After lifting the main circuit board. Note the blue connector strip which is hanging loose. Note also the main top to bottom connectors in white. The blue connector should go back in the centre white connector at the bottom front.
05.jpg ( 184 K) : Another view of the blue connector. Note the tabs on the white connector underneath, which are sticking up. They compress back in, as you see later.
06.jpg ( 208 K) : another view
07.jpg ( 184 K) : Feeding the blue connector into its hole. This was tricky.
08.jpg ( 200 K) : This blue connector is not home yet.
21.jpg ( 176 K) : I found it helped to attach a piece of tape to the blue connector, to pull on it. I pulled with my fingers and with a pair of plastic tweezers at the same time. Notice I have pushed down the two little white ears in the white connector.

Site last modified Tue Dec 27 09:27:43 GMT 2011