Solving Network Problems - HP ProDesk 400 G1 Maintenance And Service Manual

Power LED flashes Red five times, once every second, followed by a two second pause, and the computer beeps five times. (Beeps
stop after fifth iteration but LEDs continue flashing.)
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.
Table 6-2 Solving Network Problems
Wake-on-LAN feature is not functioning.
Cause
S5 Maximum Power Saving feature is enabled.
S5 Wake on LAN is disabled (some models).
Wake-on-LAN is not enabled.
Solution
2. Replace DIMMs one at a time to isolate the faulty module.
NOTE: DIMM1 or XMM1 must always be installed. DIMM1
must be installed before DIMM2.
3. Replace third-party memory with HP memory.
4. Replace the system board.
Solution
Disable the S5 Maximum Power Saving option in Computer Setup.
Select Power > Hardware Power Management > S5 Maximum
Power Savings.
Enable the S5 Wake on LAN option in Computer Setup. Select
Advanced > Device Options > S5 Wake on LAN.
To enable Wake-on-LAN in Windows 7:
1. Select Start > Control Panel > Network and Sharing Center.
2. Under Tasks, select Manage network connections.
3. Click Local Area Connection.
4. Click the Properties button.
5. Click the Configure button.
6. Click the Power Management tab, then select Allow this
device to wake the computer.
To enable Wake-on-LAN in Windows 8.1:
1. From the Start screen, type c, and then select Control Panel
from the list of applications.
2. Select Network and Sharing Center, and then click the
Ethernet link next to the connection.
3. Click the Properties button.
4. Click the Configure button.
5. Click the Power Management tab, then enable the
appropriate Wake-on LAN option.
Solving Network Problems 81