In theory it's a good idea. I'm guessing this ps3 is higher than 3.41, which is why you haven't mentioned backing up dev_flash3? I would grab a copy of his dev_flash3, as it may help if you have issues. We don't really know anything definite about this problem except that it seems to affect phats more than slims. Most theories seem to contradict each other.
Originally Posted by mark.j.tarr
One factor that may affect it is, did his play any blurays before downgrading? This may in a way authorize bluray playback. Has his ever signed into psn, and activated video and game content?
That's all i can think of, but it is currently 2am. If you're really worried, I'd wait for a couple more opinions.
STOP! Before you ask questions... READ the first post! RTFFP = Read The F*cking First Post
Yes, A 3.55 "jb" (cfw) is available, no >3.55 "jb" or cfw yet.
Yes, A 3.55 downgrade is available. But not to lower than stock firmware! (What it came with)
No >3.55 downgrade is out there yet.