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My TetherBox stopped automatically powering up after a power cut, what do I do?
My TetherBox stopped automatically powering up after a power cut, what do I do?

Why do I suddenly have to press the power button to switch the TetherBox on?

Roman Gaufman avatar
Written by Roman Gaufman
Updated over a year ago

Introduction

Note: this information does not apply to the TetherBox (2 and 5 channel) which does not have a BIOS, this only applies to the TetherBox Pico, Giga and Pro.

When your BIOS settings are reset, you may experience one of these symptoms:

  • The unit will not automatically power up when plugging in a power cable.

  • You may see a "Press F1 to Continue" message when plugging in a monitor.

  • You may see a message like: "insert boot media" or "cannot find a required map", for example:

Why does this happen?

There are 2 main reasons why this could suddenly happen:

  1. Depleted CMOS battery - the CR2032 Button battery inside of the unit has gone flat and needs to be replaced.

    Note: The lifespan of these batteries can vary from 3 to 7 years, depending on usage. These batteries are responsible for maintaining the device's settings when disconnected from main power. Extended periods of inactivity may cause the batteries to drain faster.

  2. Power Issues - If there were frequent and close together power cuts or power surges, this could cause the unit configuration to be reset.

What do I do to resolve the problem?

  1. Try to configure the BIOS again by following these guides:

    1. Automatic Power-cut Recovery

    2. How to fix a boot device?

  2. After the unit booted up, power off the unit.

  3. Unplug the power cable for 5 seconds and plug it back in.

  4. Did the TetherBox automatically power on again? - If yes, then stop here. If not, then:

    1. If the TetherBox did not automatically turn on, this indicates that the CMOS battery on the device likely needs to be replaced.

CMOS Battery Replacement

If the above steps did not resolve your issue, it is likely due to a dead CMOS battery. Replacement batteries can be found in most stores that sell watch batteries or other small batteries. If you need assistance, please do not hesitate to reach out to us for support.

The battery you require is a CR2032 Button battery.

Note: The lifespan of these batteries can vary from 3 to 7 years, depending on usage. These batteries are responsible for maintaining the device's settings when disconnected from main power. Extended periods of inactivity may cause the batteries to drain faster.

Note: On some units, the battery may be on the underside of the motherboard.

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