Hi, When trying to reset my digi DR64 I met power issue and all the indicator LED are flashing at the same time.

Without fully understanding the LED sequence, it sounds like the flash has become corrupted. This can happen if the router is powered off whilst writing to flash (e.g. during config save or factory default reset attempt)

However whatever the cause, Flashwriter can be used to re-load the router with the firmware file in the following zip:

http://transport.digi.com/digi/firmware/flashwriter/5180/DR64x0MKII/DR64x0MKII-5180.zip

http://ftp1.digi.com/support/firmware/FlashWriter.msi

There are some general instructions on using Flashwriter here:

http://www.digi.com/support/kbase/kbaseresultdetl?id=3269

In the event of the flash corruption being so severe that the bootloader is corrupted, whilst using Flashwriter you will need to hold in the reset switch when you power up the DR64, and keep held in until the Flashwriter progress bar is moving.

It sounds like it is in thin (backup) image - the router loads this if the main image becomes corrupt.

You need to use Flashwriter to re-load firmware using serial + Ethernet interfaces.
I would recommend you to use Flashwriter because it will hopefully be able to recover the unit. Flashwriter loads a complete image of the flash structure, in the form of a “.all file”, into the router’s flash memory, replacing the current flash contents and therefore is usually able to recover a corrupt unit.