HP EliteDesk 800 Maintenance and Service Guide - HP EliteDesk 800 G1 Tower, HP - Page 239

Network controller stops working without apparent cause. Cause Solution The files containing the network drivers are corrupted. Reinstall the network drivers using the Recovery Disc Set in Windows 7 or Windows recovery tools in Windows 8. If necessary, download the softpaq from the web (from a different computer). The cable is not securely connected. 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. The network controller is defective. Contact an authorized service provider. New network card will not boot. Cause Solution New network card may be defective or may not meet industry- Install a working, industry-standard NIC, or change the boot standard specifications. sequence to boot from another source. Cannot connect to network server when attempting Remote System Installation. Cause Solution The network controller is not configured properly. Verify Network Connectivity, that a DHCP Server is present, and that the Remote System Installation Server contains the NIC drivers for your NIC. System setup utility reports unprogrammed EEPROM. Cause Solution Unprogrammed EEPROM. Contact an authorized service provider. Solving memory problems If you encounter memory problems, some common causes and solutions are listed in the following table. CAUTION: Power may still be supplied to the DIMMs when the computer is turned off (depending on the Management Engine (ME) settings). To avoid damage to the DIMMs or the system board, you must unplug the computer power cord before attempting to reseat, install, or remove a memory module. 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. Solving memory problems 227