JBL Wonderboom 3 Won’t Turn OFF

The pink Wonderboom 3. Showing the top and right front panels.

When the JBL Wonderboom 3 Won’t Turn OFF, this likely means oneor more things as follows.

JBL Wonderboom 3 Won’t Turn OFF: Causes and Fixes

1. Try to forcibly restart the 3. Do this by pressing the Volume Up and DOWN and Pairing buttons, all at the same time. Hold for two seconds then release. The unit normally shuts OFF, and then powers back up. If not, then move on to the next solution.
2. The 3 needs a reset. The running programs inside could be in a corrupt state, which resetting often fixes. So try a reset, described below.
3. If the reset does not work, then try just letting the battery drain until it completely dies. Disconnect the charger and set the unit aside until all lights go dark. Then charge it and turn it ON again. Check to see then if it turns OFF. If not, then proceed to the next steps.
4. Your charger cord or adapter itself is faulty. So try swapping in a working charger and cord for the suspected bad one. The 3 may boot correctly once again.
5. The button mechanisms may have sand, dirt, or other debris in them. To repair this, you’ll have to take the 3 apart since the innards of these buttons are not accessible from outside. Then blow, brush, or polish the switch contacts.
6. The battery inside no longer recharges due to age, excessive charging, or heavy use. To resolve this, replace the battery. Again, this requires disassembling the 3.
7. Your JBL Wonderboom 3 is defective. In this case, get a replacement unit.

The pink JBL Wonderboom 3. Showing the top and left front panels.

JBL Wonderboom 3 Won’t Turn OFF: Reset May Fix

Be Sure the JBL Wonderboom 3 is Not Paired with Anything Prior to Reset

The 3 may not answer to the reset command while connected with a source Bluetooth device. So disconnect it before resetting. Since you can’t turn turn 3 OFF at this point then turn OFF Bluetooth on the device to which the 3 is paired. This will break the connection, which it is best to do prior to resetting.

Press the Power and the Volume DOWN Button Together for Five to Eight Seconds

Find the Power and Volume DOWN buttons. The Power button is on the top of the speaker, near the front. Volume DOWN is the long plum line on the front, near the bottom. See these both pointed out by the green arrows in the next picture.

The -Volume DOWN- and -Power- buttons.

The JBL Wonderboom 3 then enters reset. Within a couple seconds, the unit switches off. Next, the falling electronic ker-plunk sound plays. Then the lamp in the Power button goes dark.

The dark Power button.

After reset, the JBL Wonderboom 3 comes up in ready-to-connect mode, with the Pairing lamp rapidly flashing white.