I have two kits of Apple I from Obtronix. I've built one but is imposble to do run.
When i power on, i can see in all the screnn full of characters (@M ...). If i push reset button the screen refresh and again full of characters. If i push clear only one @ is on the left top of the screen.
+12V -12V +5V and -5V are OK.
I've exchanged all the integrated circuits, one by one, without solve the problem, so the problem must been in resistors or capcitors.
I have voltimeter and oscilloscope. Somebody can help me to fix my Apple I?