Solving Memory Problems - HP dx7500 - Microtower PC Service & Reference Manual

Table C-12 Solving Network Problems (continued)
Network controller stops working without apparent cause.
Cause
The cable is not securely connected.
The network controller is defective.
New network card will not boot.
Cause
New network card may be defective or may not meet industry-
standard specifications.
Cannot connect to network server when attempting Remote System Installation.
Cause
The network controller is not configured properly.
System setup utility reports unprogrammed EEPROM.
Cause
Unprogrammed EEPROM.

Solving Memory Problems

If you encounter memory problems, some common causes and solutions are listed in the following table.
CAUTION:
damage to the DIMMs or the system board, you must unplug the computer power cord before attempting
to reseat, install, or remove a DIMM.
For those systems that support ECC memory, HP does not support mixing ECC and non-ECC memory.
Otherwise, the computer will not boot the operating system.
Table C-13 Solving Memory Problems
System will not boot or does not function properly after installing additional memory modules.
Cause
A memory module is not installed in the XMM1 (or DIMM1)
socket.
Memory module is not the correct type or speed grade for the
system or the new memory module is not seated properly.
172 Appendix C Troubleshooting Without Diagnostics
Power may still be supplied to the DIMMs when the computer is turned off. To avoid
Solution
Ensure that the cable is securely attached to the network
connector and that the other end of the cable is securely
attached to the correct device.
Contact an authorized service provider.
Solution
Install a working, industry-standard NIC, or change the boot
sequence to boot from another source.
Solution
Verify Network Connectivity, that a DHCP Server is present,
and that the Remote System Installation Server contains the
NIC drivers for your NIC.
Solution
Contact an authorized service provider.
Solution
Ensure that a memory module is installed in the blue XMM1
(or DIMM1) socket on the system board. This socket must be
populated with a memory module.
Replace module with the correct industry-standard device for
the computer. On some models, ECC and non-ECC memory
modules cannot be mixed.