Yeha! I Founding the answer by my self here in the forum. Thanks!

We cannot rule out hardware failure. Possibly the charger is defective. Try another charger. Here are some notes about chargers.

After you’ve proven that you are using a viable charger and the unit has some charge, try this reset: Remove ROAM from the charger and hold the power button for 15 seconds. If your finger slips off the button, restart the 15 second interval. If the unit starts, place it back on the charger and continue to full charge. You can play music while the unit charges.

Note that this is not a Factory Reset and no settings will be lost.

Thanks! That was the very thing i found out in an other post. I’m pleased to find my Roam working perfectly now. Great!