Hi all, I need help updating an old PSP-1001 from 5.00 M33-4 to 6.61 so I can install ARK-4.
Console: PSP-1001 (fat), board TA-086 (01g), firmware 5.00 M33-4. pspIdent photo attached.
What I'm following: the consolemods wiki page "Updating your Firmware (OFW)", section "Updating from Old CFW". I extracted the Old CFW Update Kit to the root of the Memory Stick (500.PBP plus the PSP folder with KeyCleaner, pspident and RECOVERY).
The problem: both the official 6.61 update (PSP/GAME/UPDATE/EBOOT.PBP) and Recovery Flasher fail with "The game could not be started (80020148)". pspIdent from the same kit runs fine. Settings → System Update is missing from the menu.
What I've tried:
Launching both from Game → Memory Stick
Launching Recovery Flasher from the Recovery menu with "Run program at /PSP/GAME/RECOVERY/EBOOT.PBP"
Changing "Game folder homebrew" in the Recovery menu, trying every kernel option
Checking my 6.61 EBOOT.PBP (about 31,000 KB, MD5 matches the archive.org hash)
Nothing has been flashed, and I haven't run Key Cleaner. Is this the update blocker or something else, and what should I try next?
Background: the memory card was corrupted earlier. I recovered my data with TestDisk and reformatted it, and my games still don't show in Game → Memory Stick under 5.00 M33-4.
Thanks for any help!

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