All of a sudden my micro-clip Mp3 player isn't recognized

you facing this problem because your mp3 player do not match your computer/charging plug is not working/your computer do not load that thing.

Try this guys tips -- First one -Sansa Mp3 player frozen? How to reset and...
Then this one.--Sansa View: is not recognized by my...
Then this one -Solve your MP3 Player Connection Problem.

it will not play or come on or charge

I had the same problem this morning, albeit with my 8G Clip. Nothing worked -- the thing seemed dead as roadkill -- until I found a link about "forcing MSC mode." Basically, it told me to hold down the center button while plugging my Clip into my computer using my USB cable. Suddenly, boom! It's awake and alive and happy again. I'm unsure how that works, but that did it for me.

your mp3 player is fried, sorry. good news is that mp3 players are cheap now days and inexpensive, the new 8gb visual land player modeled after the 4th gen ipod nano is on amazon.com for 45.00. If i were you, check out the sansa clip plus, its also 45.00 on amazon with 4gb, but has a micro sd port to expand its storage up 16gb more and it sounds way better than any VL player.

You have to have a micro SD/T-Flash in the device before it will reconize it. After I installed the micro SD in mine it showed up as the kingston SD in the remove devices drive on the PC.

hi
i have a samsung yp-t7j but i don`t know how to turn on .please help me
thank you

First, try a soft reset. Do this by pressing the center button and the up volume button simultaneously and try turning it on. If that does not work for you, you will need to get a micro sd card (it can be a dummy) and insert it into the slot on the side of the mp3 player. If you do not have one, you can use one of the round edges of a paper clip (be careful) to get it to come on. When you put either in, it should come on automatically, but if not, just press the power button. This should work.

Try charging your mpr player first. -is your SD Card brand new and with warranty? I think its deffective. Return it for replacement.

wiggle your usb cord - I had to wiggle mine a bit where it plugs into the usb port in the computer before it was recognized and listed as a device in 'my computer'. only then did it actually start charging; if your computer is not recognizing it is plugged in, it may not charge.. when i finally figured this out, the actual charging of my 4 gig audiophase mps only took 10 minutes- previously i was trying to charge it for hours without any luck.