Seems like my SD Card just died... can I insert a new one? So today my HTC Desire randomly froze, then started acting strangely - only showed the background image, nothing else. Didn't respond to power-off or anything so I pulled the battery.

After this, it simply would not boot up, just gets stuck on the boot up screen.

The phone is flashed with InsertCoin ROM so I can still get into fastboot but can't make backups - it can't load the SD Card. Error given is: E:Can't Mount /dev/block/mmcblk0p1 (Invalid Argument)

When I try to mount the SD Card to my computer it fails (ie. computer doesn't recognise it at all). Tried other random SD Cards and they mount no problem (thus shouldn't be a problem with the reader)

Main question... can I insert the original SD Card that came with the phone, and will the phone bootup and be usable? (note: this SD Card would be pretty much 'as-is' since I used a diff SD Card pretty much from day 1)

Sub question... anyone with ideas on if I can salvage what is left of this original SD Card? (can't seem to get anything to recognise it at all...)

Thanks in advance!
There's no reason you can't use the original card.