This started as this..
While I was on the vacation,at some time my n900 shut down because of low battery.It was unable to reboot even after replacing the charged batteries from my 5800. ( while trying to rerbbot only the nokia screen used to show..lit for some time then shut down.)
prior to this I overclocked it to 850 MHz. worked like charm for 1 month.
then after searching similar threads I decided to flash it.
I have done this in the past also.The present firmware is PR 1.3
I thought that maybe this is the problem of OS...so maybe only flashing the OS would help...flashed it successfully but it was of no help..problem persisted.
so again after reading & reading i decided to flash the eMMC then the firmware.
now the problem is this..whenever i tried to flash the eMMC...It would start and continue upto ....
Booting device i nto flash mode.
Sitable USB device not found,waiting,

process hangs....
what should i do...Help Please.