Hi guys, my psp is suffering from the above problem.
It was previously running on 3.10 OE but my psp lcd crack and I had no choice but to send it to Sony to have it repaired.
Upon return of my PSP it is on official Sony Firmware 3.11
Now when I try to update my psp to 3.5 I get the DRNffffffd7 Error.
In fact I can't update my psp at all, except maybe using the official network update but that would bring me to 3.51 which wouldn't be what I want >_<;
Is there anyway around this problem? I've tried searching everywhere for a solution to this problem but I can't seem to find it...
Someone please help me...thanks