Sansa e280 boot problem

[TechGuy]

My son uses his e280 over a year without any problem. Few days ago, he connected to our new Vista PC and used Media Player to sync the music file. Quite a few music files were transferred to his e280. He used the e280 for a few hours. Suddenly, it continuously boots to the SanDisk logo and restart.

I tried to use the recovery mode to reformat it using sansa.fmt file. As soon as I connected the cable, it entered and exited the USB2.0 MSD mode within 1 - 2 seconds.  It did not stop at the 16MB removable drive to allow me to add the sansa.fmt file.

Anyone know what is the problem with my e280.  TIA

**********************
Welcome to Recovery Mode
**********************

Please connect USB cable

USB cable connected
Enter the USB2.0 MSD mode
                                        <----- It does not stop here to allow me to add the sansa.fmt file
Safe to disconnect USB
Exit the USB2.0 MSD mode

Upgrade finished
Resetting the system

[Chronon]

You may find this page useful: http://www.rockbox.org/twiki/bin/view/Main/SansaE200Unbrick

[TechGuy]

You may find this page useful: http://www.rockbox.org/twiki/bin/view/Main/SansaE200Unbrick

I have tried the manufacturing mode which leads to the recovery mode.  I am at the recovery mode problem described in post #1.