2813 Views 1 Reply Latest reply: Jan 16, 2008 10:53 PM by spudnuty
Has anyone experienced the middle row of keys (A through L) on an iBook G4 stop responding?
The way a keyboard works is via a matrix see:
Now I haven't seen a schematic of an iBook keyboard but it works in a similar manner.
So when you see a whole line of keys go out then one of the main traces must go bad. In this case say A9 goes bad you'd lose that whole line of keys.
So in your iBook I'd pull the keyboard and look for:
Broken cracked trace on the flex cable from the connector to the keyboard. Use a strong backlight and a magnifier and see if there are any cracks especially in the places where it's folded. If you find any they could possibly be repaired using conductive trace paint (hard to find and expensive) or rear window heater repair paint (cheap automotive store). You'd need to get it between the laminations of the flex cable. Syringe or incision?