From PS3 CFW 4.20 to OFW 3.15 help?

[Djmatrix32]

Is it possible to downgrade from CFW to OFW 3.15 or lower?

[mschumacher69]

Why on earth would you wanna do that??

[Djmatrix32]

Boredom gets the best of people... so would it be possible?

[mschumacher69]

Not sure but I think you need a hardware flasher if I'm not mistaken and it would only work if your PS3 came from the factory with a FW which is 3.15 or lower.

[Djmatrix32]

My Ps3 came out with FW 1.90... I was wondering because of QA flagging.

[mschumacher69]

You don't need to be on 3.15 to enable QA. You have to be on 3.41/3.55 CFW.

[Djmatrix32]

This I know I am saying with just using QA would it be possible.

[Liongooder]

Yep you need an E3 to downgrade & about the checking PS3 base firmware, you can see for yourself here:

http://www.ps3news.com/forums/ps3-gu...hk-120995.html

[mschumacher69]

Apparently you can downgrade without a flasher, from ps3 dev wiki:

Notes:

These tools COULD format your ps3. (which means Any and ALL psn / downloaded data could be erased)

note: several people noted that they did not suffer from dataloss even after several downgrades, but its good measure to backup before downgrading {esp. ACT.DAT which DO get erased)

Tools Needed:

• CFW355-OTHEROS++-SPECIAL.PUP (QA Flag CFW with SS patches, Can be used to downgrade your ps3 from 3.55 to lower firmwares)
• qa_flag_extra.pkg (to enable QA with downgrade)
• Firmware you want to downgrade to. (3.41, 3.15)

Installation Process:

1. Install CFW355-OTHEROS++-SPECIAL.pup (Doesn't matter what version you are. 3.55 and lower ONLY.)
2. Install qa_flag_extra.pkg
3. Run qa_flag (It will show up as this, that is fine)
4. If you hear the beeps, continue. If you do not hear beeping, come to irc.
5. Reboot
6. Go into recovery menu and Update your ps3 with the firmware that you want (3.15, 3.41 etc)
7. have it install

And now you're done. You just successfully downgraded your ps3.

Known Issues with QA flag / QA downgrades

Act.dat (PSN activation) gets deleted

Make sure you backup the file before enabling QA-extra flag and downgrade. There have been reports of ACT.DAT ("home/000000XX/exdata/act.dat") get's deleted. So make sure to backup that entire folder before flagging/downgrading.

[Djmatrix32]

So to go below 3.40 I need a flasher and btw I have the CECHE01 so hmmm...

So in theory it could work... well I am banned from PSN anyways might try this during spring break.