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3. Make sure that the adapter is installed in a correct slot.
4. Make sure that the proper device drivers are installed for the device.
5. Resolve any resource conflicts if running legacy mode (UEFI).
6. Check
http://datacentersupport.lenovo.com
bulletins) that might be related to the adapter.
7. Ensure any adapter external connections are correct and that the connectors are not physically
damaged.
A Lenovo optional device that was just installed does not work
1. Make sure that:
• The device is supported for the server (see
• You followed the installation instructions that came with the device and the device is installed
correctly.
• You have not loosened any other installed devices or cables.
• You updated the configuration information in system setup. When you start a server and press F1 to
display the system setup interface. Whenever memory or any other device is changed, you must
update the configuration.
2. Reseat the device that you just installed.
3. Replace the device that you just installed.
A Lenovo optional device that worked previously does not work now.
1. Make sure that all of the cable connections for the device are secure.
2. If the device comes with test instructions, use those instructions to test the device.
3. If the failing device is a SCSI device, make sure that:
• The cables for all external SCSI devices are connected correctly.
• The last device in each SCSI chain, or the end of the SCSI cable, is terminated correctly.
• Any external SCSI device is turned on. You must turn on an external SCSI device before you turn on
the server.
4. Reseat the failing device.
5. Replace the failing device.
Serial-device problems
Use this information to solve problems with serial ports or devices.
• "Number of displayed serial ports is less than the number of installed serial ports" on page 216
• "Serial device does not work" on page 216
Number of displayed serial ports is less than the number of installed serial ports
Complete the following steps until the problem is solved.
1. Make sure that:
• Each port is assigned a unique address in the Setup utility and none of the serial ports is disabled.
• The serial-port adapter (if one is present) is seated correctly.
2. Reseat the serial port adapter.
3. Replace the serial port adapter.
Serial device does not work
1. Make sure that:
ThinkSystem SR635 Maintenance Manual
216
for any tech tips (also known as retain tips or service
https://static.lenovo.com/us/en/serverproven/index.shtml
).
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