Macbook A1181 - Internal Keyboard issue

Hi,
I am a computer engineer with many years experience dealing with Computers, Laptops, Electronics, Windows and Mac.
I recently performed a strip down and clean of a Macbook A1181 for a customer as it was over heating and turning off.
All went well no problems or glitches and the Macbook is now running smooth with no over heat or shut down problems.
Unfortunately The keyboard seems to be giving a little trouble.
Firstly all software settings seem correct and all the keys function as should on a USB keyboard.
The internal keyboard (using the onscreen keyboard to debug) when I press the left hand shift key it presses both the shift + letter O
When I perss the letter O it thinks im pressing shift + O so all I get is capital O's can not get small o.
also (it is a spanish layout keyboard Ç,cedilla next to return key) when I press it it thinks im pressing it and the return
also when I press return it thinks im pressing Return + Ç
I have stripped down again made sure the ribbon cable is good and seated correctly, I have cleaned with Compressed air and light brush, as a last resort last night I have bathed the keyboard in 99% Isopropyl Alcohol (have done this on hundreds of laptop keyboards to clean tea, juice etc)
But again this morning the keyboard has the same problems?
Any ideas what could be the problem or what I can suggest to fix (a new keyboard and top deck is going to be expensive)
Thanks
Mark

Perhaps you may be able to locate an otherwise good keyboard assembly
from another previously-owned MacBook that has a different kind of failure.
One with a logic board or graphics failure could be a parts candidate, here.
I'd never heard of a need for nor anyone cleaning a known-good Apple keyboard
in a portable Mac, with alcohol. I know they'd cautioned against using it on the
case, the display (prior to hard glass cover) & other instances, in previous years...
However your efforts and attempts to restore function to an ailing MacBook
are commendable; the use of known good used parts may suffice in a repair.
Good luck & happy computing!

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Message was edited by: jcjcjcjc

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