"How to stop start up sound"に関する回答please download the application of ue boom in android or apple ios and their you have the controls of the speaker like EQ, language, volume, party up/make multiple speakers connect/multiple device connect to it/starting up tone, and the laat to power off the speaker.
"Why won't my speaker turn on?"に関する回答Try to disassemble the speaker dry it with dry clothe and blow dry the speaker with hair blower and search for how to disassembled the ue boom 2 in youtube... And find the bleeding hole of the speaker try to put an electrical tape or anything to cover our seal the hole... The bleeding hole is located of either the top our bottom covers...
"UE BOOM 2 Doesn't Turn on But Charging Light is On"に関する回答Am try to open your ue boom2 and disassemble it and check if theres a moisture inside of it and just try hot blow dry it... couse i have the same problem and it just make i work...