You cannot update the system with an official firmware when it has custom firmware on it.
Thats what the DADADADA error code means.
You will have to update using custom firmware.
Dark-AleX - PSP Developer
Or downgrade to 1.5 and then you can start upgrading with official firmware updates.
Official PSP Firmware
You are not retarded.
Try this:
Error 80020148 - HOW TO FIX IT
To get in to the Recovery Menu.
Cold Boot your PSP + Hold the Right Tigger.
Cold Boot means that your PSP is completely off - Not in standby mode.
Hold the Power Button all the way up for about 8 Seconds and the PSP will turn completely off.
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