Hello,
Well, the seemingly impossible seems to have happened. I did not think 11 series calcs could break, but this one did, one day, for no apparent reason.
I have a 15C with two non functioning columns of keys, the fourth and seventh columns. That is, the column that includes the cosine key, and the column that includes the numbers 7,4,1,and zero. None of the keys in these two columns work.
Can this be repaired? It's obviously some hardware problem. Anybody care to take a crack at fixing it?
Any suggestions would be greatly appreciated.
Ion Abraham
Albuquerque, New Mexico