Acer Altos R720 Series - Manual (Page 148)

5 Troubleshooting 138
Confirming loading of the OS
Once the system boots up, the operating system prompt appears on
the screen. The prompt varies according to the operating system. If the
operating system prompt does not appear, see "No Characters Appear
on Screen" on page 143.
Specific problems and corrective actions
The following contains specific problems that may arise during the use
of your server. Possible solutions are listed for each problem.
Power indicator does not light.
Do the following:
• Make sure the power button on the control panel is turned on.
• Make sure the power cord is connected correctly.
• Make sure that the wall outlet has power. Test it by plugging
another device.
• Remove all expansion cards and see if the system boots. If
successful, add the cards back in one at a time with a reboot
between each addition.
• Make sure the memory modules comply with the system
requirements.
• Make sure the memory modules have been populated according
to the system requirements.
• Remove and reseat the memory modules.
• Make sure the CPU comply with the system requirements.
• Make sure the CPU is populated according to the system
requirements.
• Remove and reseat the CPU.
• Make sure the chassis standoffs are installed only below mounting
holes. Misplaced standoffs may have contact to the pins on the
bottom of the mainboard and cause a short.