Lenovo NetVista Hardware Maintenence Manual for Netvista 6838 and 6848 systems - Page 52
Power supply, 20-pin main power supply connection
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2. The speaker is secured by one tab on either side and two at the bottom. Firmly push the speaker up from the bottom until it comes out from the tabs. Power supply If the power-on indicator is not on, the power supply fan is not running, or the computer will not power-off, use the following procedures. Check/Verify Check the following for proper installation. v Power Cord v On/Off Switch connector v On/Off Switch Power Supply connector v System Board Power Supply connectors v Microprocessor(s) connection Check the power-on switch for continuity. Check the power-on switch for continuity. FRU/Action Reseat Power Cord Power-on Switch 20-pin main power supply connection See "System board layout" on page 39 for connector locations. Attention: These voltages must be checked with the power supply cables connected to the system board 44 IBM NetVista Type 6838, 6848: Hardware Maintenance Manual