If it doesn't turn off, then use this

#VisibiLitY
;Universe X
0x006DEFCC 0x01

If you want true invisibility, then try my nooby steps:

1. Observe
Twist3d made a true invisibility hack with a video. He made his character leave the game for others, but he is actually there.

2. Search

3. Test
Test it with two PSPs. I have another PSP. I use remotejoy lite to make it work. It's a dead one.

4. Credits
Make sure to add some credit.
#True Invisibility
;Universe_X
;Enemy_X for the tips
;Twist3d for pissing me off
0x006DEFCC 0x00000000

Almost forgot you broke your PSP. I guess I'll be the one who will make it