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It's hard to help very much without knowing what kind of MP3 player it is but for starters you should: 1. Fully charge the device and then try plugging it in again 2. If that doesn't work try a different USB cable and/or different USB port on your computer. Some players also have a reset button you could try.
i thinks it's not working, check again.....
no display, no beep.....simple symptom of a dead MB
the quality of the MB is all components will work together, even if one component in it fails the MB is dead.....
this rule is not applicable to the following devices in the MB
inbuilt sound cards, or
either of the USB ports or
mouse port, keyboard port
As you can use an external device like a USB sound adaptor insted of the internal sound card for your speaker/sound.
The same goes for mouse and keyboard, you can buy keyboards/mouse that work thru USB
The same is of a USB port, if one of the USB ports fail you have the other ports to use, if all of the USB ports fail then you can use a external USB connector to a LAN port and make the LAN port a USB device.
also.....there is no option..... that you can change one of the components.....they all are embeded in the circuit board, it's cost effective to get a new MB than repair the defective component.....
Without turning off the product, disconnect the USB cable from the rear of the product.
The USB cable connects to the port on the back of the product. The port is labeled with the USB icon ( ).
Figure 1: Example USB connection (your product might not look exactly the same as this example)
Remove the cartridges from the product.
Wait for the ' Insert Cartridges ' message to display on the control panel.
Disconnect the power cord from the back of the product.
Wait 60 seconds.
Reconnect the power cord. If the product does not automatically turn on, press the Power button ( ).
Reinsert the cartridges, and then close any open doors on the product.
If you receive a prompt to print a calibration page, do so.
Reconnect the USB cable to the rear of the product, and then try printing again.
go into My computer>click properties>.hardware tab> device manager>universal serial bus controler> usb composite device properties> driver tab> roll back driver....do also to VIA USB enhanced host controller .Not positive this will help but had to do it on my sys. (win xp) to corect simmilar problem.
difficult to diagnose...do not know of a "trick"...although one solution is to get a PCMCIA card (they are getting very inexpensive now) that has 2 USB ports...you can add a USB hub from one of them to again have 4 or more ports.