Pwede rin ma-brick yung PSP kapag mali yung files na fina-flash mo sa PSP. For example, it is highly recommended that you should generate your own .dxar files instead of using the ones available sa internet coz they might not be compatible when flashed to your console. Or if you flash your PSP with a corrupted topmenu_plugin.rco file, then your console wont boot-up. But if youre running w/ 3.03 OE-A/B/C there is a recovery menu where you can re-flash your PSP with the correct version of the file or revert back to 1.5 then upgrade to 3.03 OE again.