This means if you have a converted unit and currently try to use the (not yet public / leaked) 4.30 DECH update you will get a brick... so consider yourself warned in advance!
What happens is when the bricked unit is powered on the light turns green for a few seconds, then you hear 3 beeps and its goes off.
It is suspected (unconfirmed) the reason why this bricking occurs in CEX to DEX converts on OFW 4.30 DEX is because the EID5 isn't changed, which is one factor separating the converted Retail to Debug / Test consoles from genuine and righteous DECH (DEX) consoles.
Finally, for those curious, the PS3 4.25 DEX update (also not publicly leaked yet) is not patched by Sony to brick converted consoles, so this would be the last PS3 Debug / Test Firmware you could update your converted console to (and go online with PSoN DEX) unless a work-around patch fix is discovered.
Stay tuned for more PS3 Hacks and PS3 CFW news, follow us on Twitter and be sure to drop by the PS3 Hacks and PS3 Custom Firmware Forums for the latest PlayStation 3 scene updates and homebrew releases!
By releasing this method Sony now knows how to fix it for the upcoming DEX FW. That was not without a reason why devs not made public this method!!! For devs with converted consoles it will be a massive hit in the face in the future!!!
Cheers for sharing this AnoRelease, I have now promoted the news to the main page as well.
I'm sure many PlayStation 3 developers will make good use of it, although I bet the passes included in the new PS3 SDKs (which CJPC mentioned they used to have in the 1.00 days) to access SP-INT will be watermarked per developer studio similar to the low level hardware docs that aren't included in most of the public leaks.