Acer Aspire Z5771 Acer Aspire Z5770 and Z5771 Desktop Service Guide - Page 178
System Internal Inspection, appropriate connectors.
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System Internal Inspection 0 Turn off the system and all the peripherals connected to it. Unplug the power cord from the power outlets. Unplug the power cord from the system. Unplug all peripheral cables from the system. Place the system unit on a flat, stable surface. Remove the system covers. For instructions on removing system covers, refer to "System Disassembly". Verify that components are properly seated. Verify that all cable connectors inside the system are firmly and correctly attached to their appropriate connectors. Verify that all components are Acer-qualified and supported. Replace the system covers. Power on the system. If the problem with the system is not evident, you can try viewing the POST messages and BIOS event logs during the system startup. 4-4 Troubleshooting