A1278 keyboard replacement - some keys still not working

Hello,

I've just been through the laborious process of replacing my MacBook Pro's keyboard with a new (unused) replacement keyboard. I had a tea incident a while ago and my old keyboard lost the use of its number, and some of its function and letter keys. I finally got around to doing something about that, but it seems that while I've got the use of the number and function keys back, I don't have use of most of the letter keys (q-o and a-l).

I'm at a bit of a loss as to what to do now and what the problem could be - why a completely different set of keys is now not working. Before I go complaining that the replacement keyboard is faulty (it shouldn't really be being new and all) ..I want to make sure I've done and checked everything else. I'm not sure I want to go through that process all over again with another one. Especially if it turns out to be something else. I reset the ribbon and also restored the keyboard settings in system. So, yeah - any ideas would be much appreciated.

Thanks very much!