The system (Server, RAID, etc.) doesn't work nor does the power supply.
  Check the following:
  • ATX or AT?: The power supply with the ATX form factor is supposed to connect with motherboard by 20 pin or 24 pin ATX main power. So, please check the configuration and make sure the I/O switch is on. When you use the RAID or AT system, please check all connections. And the on/off push bottom or the switch is on.
  • Minimum load: Check the specification of power supply. Does it meet the minimum load for system? If so, then do not test ON/OFF of system, only with the power supply & +12V DC fan.
  • Short Current Protection: The peripherals of power supply have the short conditions and power supply is latched into the off status.


The power supply works normally, but the monitor has no signal.
  • The VGA card is too old to support the motherboard.
  • Conflicts with configuration. Check the configuration. For more information, click here.
Why does the system restart during the starting procedure?

OCP, OVP or OPP, occurs as the power supply works.

  • OCP - Over Current Protection
  • OVP - Over Voltage Protection
  • OPP - Over Power Protection

For example: The +12V of PS offers maximum 9 amps. The system is installed with 4 SCSI hard disks (each unit needs 2.5 peak amps). So, total output amps of +12V at start up is 10 peak amps. When the PS executes the auto recovery procedure, you will see the system restart.



The WOL (Wake On Lane) doesn't work.
  • The +5VSB of power supply could not offer enough current for the system.
  • The BIOS or jumper (PWR Up On Modem ACT) on motherboard is disabled.
There are two types of connectors on INTEL motherboard; 24-pin and 20-pin. Can they be compatible?
  They are different pin assignments. Please do not plug 20-pin connector into 24-pin. It will damage the server board with plugging wrong position.
The system does not work after the chassis has been opened.
  The server board supports chassis intrusion monitoring. The server board recognized an open switch as a chassis open condition. If the chassis intrusion detection jumper is disabled, the switch is bypassed, and the BMC does not monitor if the chassis has been opened.
The system does not work after adding a new SCSI hard disk or replacing VGA with new one.
  Check the following conditions
  A) Server system
Check following Setup Utility/ Configure on the server board:1. Conflicts in the configuration occur if:
  • A device that you installed requires the same resource as another
    device. (For example, a conflict occurs when two adapters that try to write to the same address space.)
  • The server board doesn't come with the CPU, if the CPU is PIII 600MHZ, but server board offers mostly 500MHZ.
  • The RAM is 66MHZ only, but server board needs the PC-100 or PC-133 MHZ type.
You can check all the configuration in the user manual of server board to
find out the proper solution of your system.
2. CPU
  • CPU does not plug well into the basic button.
  • CPU Clock switch is set in improper position.
  • The slot 1 of the Intel Dual CPU server board has to be plugged the processor terminator card as you use signal CPU.
  • Two CPUs on the Intel Dual CPU server board have different speeds and frequencies.
Any of the above conditions will halt the system.
  B) RAID system
  • A failing SCSI device (adapter, drive, controller)
  • An improper SCSI configuration or SCSI termination jumper setting.
  • Duplicate SCSI IDs in the same SCSI chain.
  • A missing or improper installed in or on SCSI terminator.
  • A defective SCSI terminator.
  • An improper installed cable.
  • A defective cable.




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