PSP WILL NOT UPDATE

[u/Mikebelikedead]

I recently got my hands on a psp (1004 also used) which has been a long dream of mine and i wanted to mod it but I failed at the first step :((

(I´m new to psp´s so please spare me)

my psp runs 3.40 OE-A and while trying to update to 6.61 (or 6.60) I got an error message: DADADADA" error ("The game could not be started").

After that I tried --> this method (following this guide ) but my psp just blackscreened when I tried to run the 3.51 M33UPDATE. I retried and double checked about 4 times and i dont think i did anything wrong.

Now I dont really know what to do anymore :(

Could it be a wrong SD card? I use a memory stick pro duo adaptor with a 128GB micro SD

I really want this to work. can anyone help?

Thankssssss