It sounds like the speaker is in a limited feature mode. This can be unlocked by pressing and holding the power button and at the same time inserting a minijack plug and pulling it out immediately.
Please take a mini-jack audio cable and feed it to the mini-jack input on the TOO. Important do not to plug it in yet. Then put your finger on the on / off switch. Now press the on / off switch and plug the mini-jack plug into the device simultaneously as you press the switch. Immediately pull out the mini-jack cable and release the on/off button after about 2 seconds.
This brings the TOO out of POS mode, and it will now function normally again.