Oven clock cannot be set or loses time; timer functions unreliable.

Safety first: Disconnect power before removing the control panel.

• Factory reset: Perform a full reset of the Toshiba oven via the user menu or by disconnecting power for several minutes, then reapplying and setting the clock again.
• Check for power interruptions: Ensure the oven's supply is stable and not being switched off at a wall switch or breaker regularly, which can reset the clock.
• Inspect PCB components: On the control board, look for a small backup capacitor or battery used for the clock. If visibly leaking or damaged, the board may need replacement.
• Replace control board: If the clock still cannot be set or keeps losing time, replace the Toshiba control PCB.

Clock issues alone are usually not dangerous but can affect timed cooking and auto-off functions.