As if the RSOD fix wasn't enough.A CrashSerious is out to do some serious good for the PS3 Scene and you will definitely want to check out Factory Service Mode Tool v0.1.A So let's get to it.A This tool will let a Jailbroken PS3 to not need the assistance of a JIG to go to Factory/Service Mode.A In other words you can downgrade by running a PKG from the XMB.A Other benefits allow you to access Factory/Service mode.A And to make it better they used PSL1GHT which is open source and totally legal code.
The usage instructions are below and CrashSerious has provided a ton of other Q&A, FAQ's and information over on the source so make sure you check it out.
When you run the app it will beep once and reboot if successful. Three beeps indicates a failure, report the contents of factory.txt in this thread for help. (Factory.txt will save to the USB flash if you put on in the right most USB port of the PS3.) At this point you will come back up in Factory Service Mode (FSM). Place the Lv2Diag.self on the USB the Lv2diag.self will perform its intended purpose automatically. So be aware of that feature should you not be expecting the PS3 to boot back into the non-FSM XMB.
This app will not work on any of the "reDRM" firmwares, aka Cobra or TrueBlue CFW.
Install the appropriate pkg for your system; FactoryServiceMode.gnpdrm.pkg for CEX and FactoryServiceMode.pkg for DEX.
Run the app and listen for the beeps, you should enter FSM automatically.
Place the desired Lv2Diag.self files on the root of a USB flash drive, ensuring they are named Lv2diag.self. The one included with this release simply exits FSM. Do NOT use the RSOD Lv2Diag released earlier unless you have RSOD.
Place the USB Flash Drive in the right most USB port of the PS3.
Restart the PS3. When it boots up, you will be out of FSM.
Enjoy sticking it to the dongle makers in your own little way."
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If you got an error while installing Themes, Software or Games, please, read FAQ.