Compu-85, thank you for your help. Your comments helped me to repair my board. When you said R46, I started looking at that area. The problem was the via that I have the arrow pointed to. I did not think to check it, since the tracing tested fine. I ran a small wire through the via, and the board works! On a side note, I still need noob help learning how to check the voltages!
On Thursday, November 30, 2017 at 5:25:52 PM UTC-8, austj...@hotmail.com wrote:
Comput_85 thank you for your comment, and previous ones also. I'm having a hard time figuring out how to actually check for voltage. I have a simple multimeter. Do you use both the red and black lead? Sorry for my ignorance. I'm still learning.
On Thursday, November 30, 2017 at 4:35:55 PM UTC-8,
austj...@hotmail.com wrote:
My Apple Lisa 2/5 I/O board gives me a COPS chip error. I tested the chip in another I/O board it works just fine. I switched out the socket. I checked for continuity on each pin in the new socket. I have checked every single tracing that connects to every pin of the COPS socket, all test fine.
The computer starts just fine with another I/O board.
Symptoms, the computer powers on the second power is turned on. I don't have to push the power button. It just double beeps and gives I/O board error 52.