User manual

PICDEM.net™ 2 DEVELOPMENT
BOARD USER’S GUIDE
 2011 Microchip Technology Inc. DS51623D-page 25
Chapter 4. Troubleshooting
4.1 HIGHLIGHTS
This chapter will cover the following operational issues and how to resolve them:
• Common Issues
4.2 COMMON ISSUES
1. User LED D8 does not light or flash when power is applied to the board.
Check the PICDEM.net 2 Development Board for power:
• Verify that the power supply is plugged in and the wall outlet has power.
• Check that voltage is available (9 V
DC) at the barrel plug.
• Check that the regulated voltages (3.3 V
DC and 5 VDC) are available at the
connectors at the prototype area of the board.
Make sure that the microcontroller is programmed correctly. This includes verify-
ing that the device configuration specified by the Flash Configuration Words is
appropriate for the application.
If a programming device is connected via the ICSP™ interface (J4), verify that
the programmer is not holding the device in Reset.
2. The Link LED on the active Ethernet ICM is not lit or only lights
intermittently.
Check the board for power (see Issue 1, above).
Make sure that the microcontroller is programmed correctly.
Verify that the Ethernet cable is connected to the proper ICM for the firmware
being used.
Verify the connection between the board and the network or local host.
Verify that the correct Ethernet cable is being used:
• When the Development Board is directly connected to the host system, a
crossover cable must be used.
• When the Development Board is connected to the host system through a
network device (such as a hub or switch), a “straight-through” cable must be
used.
3. The LCD doesn’t display a message when power is applied to the
PICDEM.net 2 Development Board.
Check the board for power (see Issue 1, above).
If the board functions normally otherwise (including connectivity to the host
system), the LCD display itself may be faulty. Contact Customer Service for
additional assistance.
Note: If you suspect that one of the Ethernet cables supplied with the kit is
damaged, be certain to replace it with the same type of cable (either
straight-through or crossover). An Ethernet straight-through cable may not
work if the Development Board is directly connected to a host system.