Lenovo ThinkCentre E50 Hardware Maintenance Manual page 123

Note: When the power cord is first plugged in, the computer might appear to turn
on for a few seconds and then turn off. This is a normal sequence to enable
the computer to initialize.
1. Ensure that all components have been reassembled correctly and that no tools
or loose screws are left inside your computer.
2. Replace the covers that were removed and secure them with the thumb screws.
3. Reconnect the external cables and power cords to the computer. See "Rear
connectors" on page 84.
4. If you have replaced the system board, you must update (flash) the BIOS. See
"Flash update procedures" on page 337.
5. Some FRU replacements require the configuration to be updated. See Chapter 6,
"Using the Setup Utility," on page 49.
Chapter 8. Replacing FRUs (Tower computers)
117