HowTo update firmware U5 ? Problems

[Angel_de]

I just bought a YP-U5J and it seems like a nice mp3-player if it would even work.
If i plug it to my computer it sometimes say "charging" or "USB Connected" or the display stays black

I dont even know if the battery is loading. Sometimes i can access the device and sometimes i can't.

Firmware is 1.33 and i already downloaded 1.52 but i've not found any instruction on how to upgrade this stick to (maybe) get rid of all the problems.

I hope anyone can help me.

If the battery is charging the display should be always on, right?

Now i just had the display flashing "charging" for 30sek, then a short "usb connected" and now the display is off again.
Should i return the stick, because it's broken?

[CrowdAds]