While cleaning my apple //c keyboard, something must have happened as now when I type the second and fourth rows it displays a different characters: instead of "Q" it shows " ' " and the same with z, and all the row.
The weird thing is that after several times reconnecting, checking the chips to be seated correctly, etc, found that if I click on "Q" several times and the "qwerty" key several times I get the "q". Character for a couple of times, but after that it reverts to " ' ".
Never mind, I reseated again the ROM and it worked.
The power of Troubleshooting.