User`s manual

Am186™CC Microcontroller Router Reference Design User’s Manual
1-6
Troubleshooting Installation Problems
Table 1-1. Installation Troubleshooting
Problem Solution
Nothing happens when
pushing the RESET
button.
Sometimes it is difficult to make a good connection
when pushing the small RESET button. If all else
fails, remove the power supply from the AC
electrical outlet and disconnect and reconnect the
power supply. The LEDs light up when the reset is
successful.
The computer does not
respond with the E86MON
software prompt.
Reset the board by pressing the RESET switch and
typing an a immediately after power up. If this does
not work, verify the power, check the cables, etc.
After typing a during reset,
the terminal emulation
software displays
unreadable characters.
Check the baud rate setting for the terminal
emulation software. It should be set to 19200. Also
check the word length (8), stop bits (1), and
parity (N), and turn off any hardware flow control.
The terminal emulation
program locks up the
software or PC.
Check the COM port connection with the target
board. Make sure that the same COM port is
selected in the terminal emulation software. In
some PCs if the correct COM port is not specified,
the software fails to function—it locks in a
continuous loop waiting for an answer from the
incorrect serial port.
The power LED (CR8)
does not turn on with
power.
This LED should turn on for one second and then
turn off. If it doesn’t turn on, immediately
disconnect the power supply. Ensure that the
polarity of the power connector is correct. This is a
very serious failure of the hardware. If the power
source is connected incorrectly, the board is
permanently damaged.
There is a problem you
cannot resolve.
Contact AMD Technical Support (see page iii for
phone numbers and more information).
about.book Page 6 Wednesday, July 21, 1999 11:10 AM