Jan 3, 2011 Guide - How to downgrade PSP firmware 6.20 to firmware 5.03

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Hello guys! How's your TN-B? I wonder if it's running well on your PSP? I hope so. As I explained in the previous post, TN-B includes a lot of new features. One of the biggest and best improvements is the ability to downgrade firmware 6.20 to firmware 5.03. Yeah, I know, you must wonder if this feature really works. So I have tested it and it really works.

Unfortunately, I'm only able to test it on my PSP 2000 (Hackable mobo). According to PSPGEN, this features should works on PSP 2000 (TA-088 v3) and 3000 too but they can't 100% guarantee about that. It means, your PSP has a possibility to brick while attempting this feature. You should bear in mind that if your PSP (TA-088v3 /3000) bricks, there is no way for you recover the brick. I don't want to scare you, but you really need to think about the possibility.

The good news is there are people who already tested the feature on PSP 3000. Guess what? They really did it and it works without problems. Maybe you wont believe me but it's true. You can CLICK HERE [PSPKind.de] to read their discussion.

Wah..what a long explanation. Actually, today, I'd like to share a guide : How to downgrade PSP firmware 6.20 to firmware 5.03 with 6.20 TN-B. If you planned to downgrade your firmware 6.20 to 5.03, this guide will help you.

Warning:

Use it at your own risk. Please be aware that the brick is possible. 

Bear in mind that if your PSP (TA-088v3 /3000) bricks, there is no way for you recover it.

I'm not responsible if your PSP bricks, or induce any system errors.

Guide : How to downgrade PSP firmware 6.20 to firmware 5.03

Requirement:

• PSP with 6.20 TN-B (Not for PSPGO) [Download HERE]
• 5.00 version text.
• 5.03 eboot.pbp [Download HERE]

STEP 1

 Please make sure that your PSP is running 6.20 TN-B. If not, please download it at the link below.

 [Click HERE for 6.20 TN-B Installation Guide]

STEP 2

The next step is I will show you a guide how to retrieve 5.00 version.txt.

Requirement:

• PSARDumper [Download HERE]
• 5.00 eboot.pbp [Download HERE]

The first thing you need to do is dump and decrypt the 5.00 eboot.pbp. HOW? Please refer the guide below.

Click HERE for GUIDE: How to dump and decrypt PSP  firmware.

After you got F0 folder, copy your 5.00 version txt in F0/vsh/etc  

and paste it right into your seplugins folder.

STEP 3

Firmware 5.03 installation. You need to install firmware 5.03 into your MS. 

You can refer this : Manual update guide 

*This is manual update for 6.20. But you can use it as your reference.

STEP 4

In order to make the downgrade works, you need to set up your TN Vsh Menu

Press [SELECT] to show up your TN Vsh Menu.

There are 3 things that you to reconfigure : (Please make sure)

• Fake index.dat = Enable
• Protect flash0 = Disable
• Spoof version = Disable

After you already configure them, (still on TN Vsh Menu) select RESTART VSH and enter to restart your TN Vsh.

Now, you can check your PSP System Software. You should be able to see 5.00 written there.

STEP 5

Almost there! We are almost finished!

At your PSP XMB, Game/ MS/ PSPtm Update ver 5.03.

Run the update and I wish you good luck ^^..That's all...