Hi,
Have you got anything connected to the speaker, like a charger or a stereo audio cable or both?
If not a ''flashing red light ''means that the '''''battery is low and needs to be charged'''''.
Connect a charger and see if the red light stays on permanently. It can take up to 3 hours to charge fully. The light will turn green when it has.
A ''quick flashing blue light ''means that it is waiting to be paired with a Bluetooth device (e.g. a mobile phone)
A ''slow flashing blue light ''means that it is already paired with a Bluetooth device,
Once the speaker has fully charged you can reset it by pressing and holding play/pause for 5 seconds or so until you hear a sound or the red light flashing. Note: Restoring the speaker's factory defaults ''erases all paired Bluetooth devices from the speaker's memory. ''
You can now pair your speaker with your Bluetooth device
Here is an Ifixit guide on how to troubleshoot your HDMX Jam
[[HMDX Jam Troubleshooting]]