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Old 05-25-2010, 06:00 PM   #1
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Restoring Firmware after PRS+

PRS+ created some files starting 1.2 as I 'downgraded' to the US firmware in order to try PRS+

I can't seem to find instructions on what to do with these files to get the UK firmware back on there - there is no download on Sony or anything either (not for UK anyway).

I might sell the 505 so would prefer to restore to UK rather than US firmware.

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Old 05-26-2010, 01:54 AM   #2
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Did you save the backup files, created by PRS+ installer?
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Old 05-26-2010, 07:42 AM   #3
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Yes - there are about 6-7 files (I am not at the relevant computer) that mostly or all start with 1.2 (which I guess is related to the firmware version in the UK).

I moved them off the device and on to a folder on my pc to back them up.
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Old 05-26-2010, 08:13 AM   #4
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You have to create md5 files with md5 hash of the saved files (using, for example this or any other utility http://www.winmd5.com/) you only need rootfs and fsk.

Download installer, in PRSPInstaller\Sony Reader\software\firmware\505\ replace:
1) Fsk.img with corresponding backup file
2) Edit Fsk.img.md5 and put updated hash info there
3) 1.1.00.18040.root file with corresponding backup file (1.2....)
4) Edit 1.1.00.18040.root.md5 content accordingly

Then start PRS+ installer, go to advanced settings, force flash root fs then force flash fsk.

That should restore your UK firmware.
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Old 05-26-2010, 08:32 AM   #5
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So I only need to create the md5 files for the backed up versions of rootfs and fsk?

Edit these two files in the PRSP installer directory as above (steps 2 and 4).

For Steps 1 and 3, replace those named files with the same named files from the backup.

Go to PRS+ installer and do the flash root and flash fsk (assume these will be options under Advanced Settings.

Sorry if I am repeating what you told me - just trying to get it clear in my own head as this is the first time I've ever flashed an e-reader device!
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Old 05-26-2010, 08:47 AM   #6
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Yes, you got it right.
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Old 05-26-2010, 03:03 PM   #7
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kartu

I don't have files in the backup called fsk.img or

This is what I have:-

1.2.00.18050.boot
1.2.00.18050.boot.0
1.2.00.18050.fsk
1.2.00.18050.fsk.0
1.2.00.18050.root
1.2.00.18050.root.0
1.2.00.18050.root2
1.2.00.18050.root2.0

So I can see what files I need to replace at step 3 with the hash from 1.2.00.18050.root

Do I actually need to create 2 new files called rootfs and fsk?

I'm a little confused

Could you possibly point me in the right direction of which files from the above relate to each step?
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Old 05-27-2010, 01:59 AM   #8
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1.2.00.18050.fsk => this is your Fsk.img
1.2.00.18050.root => this is your 1.1.00.18040.root

.0 files mean that you've backed it up 2 times ^^.
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Old 05-31-2010, 07:41 AM   #9
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Hi Kartu

I have done all above and got the option to flash root under Expert Options - but not the option to flash fsk. I have done the flash root and rebooted, for the moment it is still the same.

What step did I miss (unintentionally).

At least it is not bricked - still works fine but is still under PRS+ firmware version.
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Old 06-01-2010, 02:29 AM   #10
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suecsi
You did everything right.
PRS+ is located only in FSK. It seems to work just fine with UK firmware.

The option to flash Fsk partition is called "Flash PRS+ Firmware".
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