Tracker ONE no status LEDs


Yesterday I kept the Tracker One connected to USB my laptop when I was going through different settings (console, workbench, and my laptop). Later when I tried to power it up again the LEDs gone.
The console showed ‘Device offline’ and cmd - particle setup’ showed ‘No devices detected via USB’. I have tried another cable which works well with another Tracker ONE and pressing reset/mode buttons but with no luck.
I guess there won’t be a serious problem since I didn’t connect it with other power sources nor uploaded odd programs onto it.
Anyone has similar experience before?

Tracker seems to require pretty substantial usb charge current, and most laptop usb ports don’t provide enough. Try powering it from a 2A wall-brick and see if it wakes up.