Touch keys not responding
First key on each row is not responding. Others work great.
The first Speak & Spell was introduced at the summer Consumer Electronics Show in June 1978, making it one of the earliest handheld electronic devices with a visual display to use interchangeable game cartridges.
grammyjuju, take a look at the keyboard to make sure the contacts are all nice and clean. Check the keyboard connector on the logic board, make sure that the contacts are clean, not bend and that it is properly inserted. You can clean the contacts with an eraser. Check Burnt after wrong voltage AC adapter. for some more diagrams.