Solving Network Problems - HP 280 G4 Maintenance And Service Manual

Power LED flashes red three times and then white two times.
Cause

Solving network problems

Some common causes and solutions for network problems are listed in the following table. These guidelines
do not discuss the process of debugging the network cabling.
Network driver does not detect network controller.
Cause
Network controller is disabled.
Incorrect network driver.
Network status link light never flashes.
NOTE: The network status light is supposed to flash when there is network activity.
Cause
No active network is detected.
Network controller is not set up properly.
Network controller is disabled.
Network driver is not properly loaded.
System cannot autosense the network.
64 Chapter 6 Troubleshooting without diagnostics
Solution
3. Replace third-party memory with HP memory.
4. Replace the system board.
Solution
1. Run Computer Setup and enable network controller.
2. Enable the network controller in the operating system using
Device Manager.
To access Device Manager in Windows 10, type device
manager in the taskbar search box, and then select Device
Manager from the list of applications.
Check the network controller documentation for the correct driver
or obtain the latest driver from the manufacturer's website.
Solution
Check cabling and network equipment for proper connection.
Check for the device status within Windows, such as Device
Manager for driver load and the Network Connections applet
within Windows for link status.
To access Device Manager in Windows 10, type device
manager in the taskbar search box, and then select Device
Manager from the list of applications.
1. Run Computer Setup and enable network controller.
2. Enable the network controller in the operating system using
Device Manager.
To access Device Manager in Windows 10, type device
manager in the taskbar search box, and then select Device
Manager from the list of applications.
Reinstall network drivers.
Disable auto-sensing capabilities and force the system into the
correct operating mode.