Oki ES9160 Maintenance Manual page 270

5.9.2 Operating Procedure of Assist Mode
(1) Turn ON the power while [3] button and [CLEAR] button are pressed simultaneously.
The following screen is displayed.
Firmware Assist Mode
Select number(1-8) and press START key
1. Clear Error Flag in Software Installation
2. Format Root Partition
3. Format HDD
4. Clear SRAM
5. Key Backup Restore
6. Erase HDD Securely
7. Erase SRAM Securely
8. Clear Service Tech Password
(2) Select the item with the digital keys and press the [START] button.
ES9160 MFP / ES9170 MFP
SELF-DIAGNOSIS MODES
Fig.5-6
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