Toshiba e-STUDIO281c Service Handbook page 599

(5) Turn ON the power while [4] button and [9] button are pressed simultaneously.
When the update program is used, the following screen appears.
After the update program is finished being loaded, the following screen appears.
Note: Note:
If the "dlFirmWare_28_451C" file of the update program is not stored in the USB storage device
though "mentusb.o" file exists, or the loading of the update program fails, the following screen
appears. In this case, check if the update program is correctly stored and repeat step (5) and
after.
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