HP Dc5750 HP Compaq dc5750 Business PC Service Reference Guide, 1st Edition - Page 161
Screen Message, Probable Cause, Recommended Action, Run Computer Setup and diagnostic - dc5750s ram
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POST Error Messages POST Error Messages (Continued) Screen Message Network Server Mode Active and No Keyboard Attached Probable Cause Keyboard failure while Network Server Mode enabled. Parity Check 2 System will not boot without fan. Parity RAM failure. CPU fan not installed or disconnected in VSFF chassis. Recommended Action 1. Reconnect keyboard with computer turned off. 2. Check connector for bent or missing pins. 3. Ensure that none of the keys are depressed. 4. Replace keyboard. Run Computer Setup and diagnostic utilities. 1. Remove the access panel, press the power button, and see if the processor fan spins. If not spinning, make sure the fan cable is plugged onto the system board header. Ensure the heatsink is properly seated and installed. 2. If the fan is plugged in and the heatsink is properly seated but the fan does not spin, then replace the heatsink-fan assembly. Service Reference Guide, dc5750 437963-001 C-7