express not switchin on !!

hey ppl…

my sansa exoress was suffering from the bootup problem and i inserted a micro SD card and booted up after which it started workin… I then plugged it in to do the update accd to the instructions posted in one of the above forums… The update began and it asked for a restart of the comp… i restarted my comp and my sansa doesnt start up after that… not even the sandisk logo appears when i press the power button… when i plug it in, it asks to install the mtp driver… pls cud someone help me asap… im missin my sansa express terribly…!! thanks a lott in advance

try this
worked for me.