1. amber led alert at blade
2. keyboard is blinking
3. server cannot be accessed
You have to follow these steps :
1. Force shutdown
2. Reboot the server
3. During post message, press F2 to enter "Diagnostics"
4. Run the DSA
5. After finish, check to "Report Highlights", major error will be listed like below image :

Solution :
1. Need to update the firmware
2. Download from IBM support, the firmware is called as BOMC
3. Put the firmware into the usb drive
4. Reboot the server and press F12 to choose the boot media.
5. Choose boot from usb
6. Firmware installation will be boot up.
7. Choose to update all firmware.
8. After finish,reboot is required.
9. Solved