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Error U2-74 indicates a problem with firmware recovery and can be reset by the operator by acknowledging (OK) the error display.
On devices that are not switched off overnight, the device firmware is checked at 3:00 a.m. If a change in the firmware is detected during this check, the original firmware is restored. This is a security function that prevents manipulation of the device firmware. This function can be activated/deactivated in the security settings of the device.
Technical report Sharp Germany
Systems Settings Security Settings Conditions Settings √ If Firmware Corruption is Detected, Restore It
Error U2-74 indicates a problem with firmware recovery and can be reset by the operator by acknowledging (OK) the error display.
On devices that are not switched off overnight, the device firmware is checked at 3:00 a.m. If a change in the firmware is detected during this check, the original firmware is restored. This is a security function that prevents manipulation of the device firmware. This function can be activated/deactivated in the security settings of the device.
Technical report Sharp Germany
Systems Settings Security Settings Conditions Settings √ If Firmware Corruption is Detected, Restore It
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