Toshiba e-Studio 2010AC

1. General description
   When the lamps on the control panel do not light or error codes are not displayed on the LCD screen after the power has been turned ON, perform this troubleshooting.
2. Status LED / Power LED
   After the power is turned ON, the status of the equipment from the startup until the end of system device initialization (the LCD screen works) is displayed by the status LED (8-bit) on the SYS board. When the equipment does not start or the LCD screen does not display after the power is turned ON, check this status LED on the SYS board in order to judge the corresponding troubleshooting. In addition to this, the power LED is lit when 12 VA power is being supplied to the SYS board.
   
3. Measures
   When an error code is displayed, perform its troubleshooting. If the LCD screen is turned OFF and an error code cannot be confirmed as a result, check the lighting condition of each LED and perform the troubleshooting according to the status below.
   

Main Power LED / Energy Saver LED (on Control panel)

LED	Lighting condition	SYS power LED	Troubleshooting
Main Power LED	ON	ON	The control panel does not operate normally. Check the connection of the harness (41-pin) of the control panel. Check if there is no abnormality in the harness. Check if there is no abnormality in the parts of the control panel. Download the system software again. Check if there is no abnormality in the SYS board. Replace the main memory (DIMM). Replace the control panel. Replace the SYS board.
		OFF	The 12 VA power is not supplied to the SYS board. Check the connection of the power harness of the SYS board. Check if there is no abnormality in the harness. Check if there is no abnormality in the switching regulator. Check if there is no abnormality in the SYS board. Replace the power harness of the SYS board. Replace the switching regulator. Replace the SYS board. The 12 VA power supply is stopped due to an overcurrent. Turn OFF the main power switch and open the front cover. While keeping this status, press the main power switch to check that the SYS power LED is turned ON. [If the SYS power LED is turned ON] Check if there is no abnormality in all harnesses with the 24 V power supplied. Check if there is no abnormality in all boards with the 24 V power supplied. Replace all boards with the 24 V power supplied. [If the SYS power LED is not turned ON] Check if there is no abnormality in all harnesses with the 12 VA power supplied. Check if there is no abnormality in all boards with the 12 VA power supplied. Replace all boards with the 12 VA power supplied.
	OFF	ON	The 5 VS power is not supplied to the control panel. Check the connection of the harness of the control panel. Check if there is no abnormality in the parts of the control panel.
		OFF	The power is not supplied to the SYS board. Check the connection of the power harness of the SYS board. Check if there is no abnormality in the switching regulator. Check if there is no abnormality in the SYS board.
Energy Saver LED	ON	-	-
	Blinking	-	When the Energy Saver LED is turned OFF after a certain time has passed: Initialization between the control panel and the SYS board is not completed. Check the connection of the harness of the control panel. SYS board abnormality (Check the lighting condition of the SYS power LED and the SYS status LED, and perform the measures described in the next table.)
		-	When the Energy Saver LED blinks even if some times have passed: The LCD is not turned ON after initialization between the control panel and the SYS board is completed. Check the connection of the harness of the control panel. Check if there is no abnormality in the parts of the control panel. SYS board abnormality (Check the lighting condition of the SYS power LED and the SYS status LED, and perform the measures described in the next table.)
	OFF	ON	The 12 VA power is not supplied to the control panel. Check the connection of the harness of the control panel. Check if there is no abnormality in the parts of the control panel.

Power LED / Status LED (on SYS board)

LED		Lighting condition	SYS board status	Troubleshooting
Power LED		OFF	Waiting for the power supply	Check the connection of the switching regulator harness and the power supply harness. “[ 2 ] The equipment does not start after the power has been turned ON.”
Status LED	Bit7	ON	Main memory abnormality	• Check the installation status of the main memory, and reinstall it if necessary. • Perform calibration of the main memory at the startup. • Replace the main memory or the SYS board.
	Bit4	ON	Network IC communication error	Replace the SYS board.
	Bit3	ON	ASIC detection error	Replace the SYS board.
	Bit2	ON	HDD/SSD detection error	• When the error code is from F100 to F109, perform the HDD/SSD fault diagnosis by following each troubleshooting. • If the LCD screen does not display, check the connection of the HDD harness.
	Bit1	ON	Control panel communication error	• Check the connection of the harness of the control panel. • Check if there is no abnormality in the parts of the control panel.
	Bit0	ON	Errors other than the above	Replace the SYS board.

Remarks:
When Bit1 or Bit7 of the status LED is ON and an error code is displayed on the LCD screen, perform the troubleshooting for each error code. The lighting condition of the status LED is determined while Bit0 is turned OFF. Due to this, be sure to check the condition from Bit1 to Bit7 while Bit0 is turned OFF.