=== IBM s/36 model 5363 ===

Hi guys ! Who could help me with that machine? Here is my problem : I've been given an IBM 5363 with an IBM 3197 terminal (twinax). The machine boots well (or seems to do so !), and after few minutes, I can obtain on my display the IPL configuration screen, asking me for my user ID and password. The problem is that whatever I type on the keyboard, NOTHING APPEARS ON THE SCREEN !!!!!! I can only ear the disk drive of the 5363 that is running. As I own three keyboards, I tried to change them, but the problem is always the same... I didn't know what to do , so I simply entered the "E" function on the front pannel of the computer, that made him stop. And I switched it off. Could anyone tell me why the characters don't appear on the screen ? When I strike a key, I just obtain a little blinking cross "X" , that is written on the last line, located at the bottom-left side of the CRT. I'm also looking for images of the IPL and diagnostic disks. Hoping to read from you soon, Fred BOSSU