Toshiba e-Studio477s, Service Manual, Page: 53 / 482

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SELF-DIAGNOSTIC MODE
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• When "3" is keyed in and the [START] button is pressed, the operation starts.
3.12.3 Functions
[A] 0. Set Serial Number
When replacing SYS-SRAM, select this to set the serial number of the equipment since it must be done
in advance of recovery from SRAM backup data.
• Clear SRAM first and then set the serial number in this mode.
• Recover from SRAM backup data after setting the serial number.
Refer to  P. 9-2 "9.1.4 Cloning procedure"
Select "0" and then press the [START] button. Then key in the serial number of this equipment.
The keyed in serial number appears on the menu.
Fig. 3-22
[B] 1. Clear SRAM
Select this to clear all SRAM data when replacing SYS-SRAM.
• Replace the SRAM board and then clear the SRAM data.
• After clearing the SRAM data, initialize SRAM following its replacement procedure.
Refer to  P. 6-22 "6.2.5 Precautions and procedure when replacing the SRAM board (for the SYS
board)".
Notes:
When this operation has been done, do not perform HDD partition creation (Format HDD) before
the normal start-up.
[C] 2. Reset Date and Time
Select this to clear an F800 error which occurred when the date and time were set as after the end of
the year 2037 or when the actual end of the year 2037 has come.
• After selecting this, start the equipment in the normal mode to reset the date and time.
[D] 3. SRAM Re-Initialize Support
When the SRAM board (for the SYS board) and the SYS board are replaced at the same time, or an
F900 error occurs, the machine information needs to be reset with this function.
After the resetting is completed, initialize SRAM following its replacement procedure.
 P. 6-22 "6.2.5 Precautions and procedure when replacing the SRAM board (for the SYS board)"
SRAM Clear Mode System Firmware Version
Update Mode : xxxx(x.x.x.x)
: 6c Mode
0. Set Serial Number
1. Clear SRAM
2. Reset Date and Time
3. SRAM Re-Initialize Support
> Serial Number Setting Complated.. xxxxxxxxxx