First things first! If you want to try the Modded PUP again:
From Service Mode:
1- The USB Drive you put your downgrade files on, must be FAT32 format.
2- When downgrading, make sure only two files are on the USB. Modded PUP and Lv2(1) file. MAKE SURE THE FILENAMEs ARE RIGHT, OR THEY WILL NOT WORK AT ALL!!!
3- When you plug the USB into your PS3, make sure you put it as far right
as you can. The one closest to the blu-ray drive
4- Turn on the PS3, and make sure you wait long enough. 5-10 minutes, more or less. (Towards the end, it is supposed to blink, then turn off)(If it just keeps blinking, you do not have the right files on the USB drive.
5- Turn on PS3, verify 3.41. Turn off, put Lv2 (2) file onto USB (only file on the USB!). Place it back into PS3 same place as before. 1-2 minutes, you should be out of Service Mode, and back into 3.41!
FIRMWARE: PS3 System Software (aka Firmware) versions - Dukio