Solutions

Checking if the problem reoccurs

1. Before replacing the board, cable and operation panel, check if the problem reoccurs.

Disconnecting, reconnecting and replacing the USB cable

1. Disconnect and then reconnect both ends of the USB cable and check if the problem persists.

2. If the problem persists, identify the cause of the problem according to the flowchart.

3. For information about how to remove and reattach the PCBs, control panel and cables, see Chapter 4 "Replacement and Adjustment".

Replacing DIMM

1. Unlock the DIMM socket, and then remove the DIMM.

2. With the locks at the sides of the DIMM socket lowered outward, insert the new DIMM.

   Be sure to insert the DIMM vertical to the socket.

3. Insert the DIMM all the way through until it clicks.

   DIMM replacement procedure (excerpts from the manufacturer's specification sheet)
   
   DIMM locking status (A: unlocked, B: locked)
   

LED/POSTCODE Display

1. POSTCODE
   When the power is tuned on or when the machine recovers from the STR state, the BIOS self-diagnostic code appears.

   LED after BIOS is completed

   POSTCODE1,2,3,4,5,6	Lighting up
   POSTCODE7	Lighting up
   POSTCODE8	Blinking

   In case of DIMM loose connection or BIOS error, POSTCODE 7 does not blink and part or all of the LEDs light up.

   Device status and LED indication

   Status	LED
   	BIOS/OS LED (Red)	POST CODE LED(Red)
   Normal (at the startup)	Undefined	Undefined
   Normal (waiting)	Slow blink (every 1 second)	Slow blink (every 1 second)
   DIMM error	Off	Part or all LEDs light up.
   Controller board error (BIOS error)	Off	All LEDs light up.
   Controller board error	Slow blink (every 1 second)	POST CODE8 Slow blink (every 1 second)

   
   

   Fig.8: LED area

   

   Fig.9: Normal (waiting) (POSTCODE_8 and BIOS/OS LED blinking every 1 second.)

   

   Fig. 10: Error status

   [A]: LEDs 1, 3, 5, and 7 light up.

   [B]: LEDs 1 to 8 all light up.

   
   

   

Checking the Fuse

Check the voltage at the OUT (operation panel).