Why Is The Access Led Off When The Chassis Is On - National Instruments PXIe-4135 Getting Started Manual

4. Navigate to the Device Manager.
Operating System
Windows 10/8.1
Windows 7
5. If you are using a PXI or PXI Express controller, verify that a National Instruments
entry appears in the System Devices list. Reinstall NI-DCPower and the module if error
conditions appear in the list. If you are using an MXI controller, right-click PCI-to-PCI
Bridge, and select Properties from the shortcut menu to verify that the bridge is enabled.
Why Is the ACCESS LED Off When the Chassis Is
On?
The LEDs may not illuminate until the module has been configured in MAX. Before
proceeding, verify that the PXIe-4135 appears in MAX.
If the ACCESS LED fails to illuminate after you power on the PXI Express chassis, a problem
may exist with the PXI Express power rails, a hardware module, or the LED.
1. Caution
Applying external signals while the module is powered off may cause damage.
Disconnect any signals from the PXI Express module front panels.
2. Remove any front panel connections from the PXIe-4135.
3. Power off the PXI Express chassis.
4. Remove the module from the PXI Express chassis and inspect it for damage. Do not
reinstall a damaged module.
5. Install the module in a different PXI Express chassis slot from which you removed it.
6. Power on the PXI Express chassis.
7. Verify that the module appears in MAX.
8. Reset the module in MAX and perform a self-test.
If the ACCESS LED still fails to illuminate and failures continue, contact NI technical support
or visit ni.com/support.
Related Information
For more information about LED status indicator behavior, see the front panel topic for your
device in the NI DC Power Supplies and SMUs Help.
16 | ni.com | PXIe-4135 Getting Started Guide
Description
Right-click the Start button, and select Device Manager.
Select Start»Control Panel»Device Manager.
Apply external signals only while the PXIe-4135 is powered on.