Nathan;
There is NO default screen for the PSP to boot to. You're getting wound up over absolutely nothing and quite frankly, due to stock shortages you'll be lucky if they exchange the unit as there is nothing wrong with it.
Does it boot UMD movies and games?
Does it load save data from the Memory Stick?
Does all it's functions work (buttons, etc)?
If so, you don't have a leg to stand on because all you're being is borderline obsessive and far, far too touchy in YOUR demands of what PSP should boot to. My Japanese PSP has booted to the Save Data menu before ... how tragic. Press left, right, up, or down and move to whatever part of the browser you want it to.
I've owned one for 9 months, I know what I'm talking about. Your PSP is in perfect working order and quite frankly it should have a more deserving owner.
Oh, and I can assure you that you don't have a UMD quality rip of Jurassic Park at 280mb. It might look this way to the "naked eye" but I've got ripping DVD's to MP4 format down to an artform. The programs out there (3GP Convertor offers the highest bit-rate sampling) are best on PC for PSP conversion, but for DVD/UMD quality a movie is around 900mb. That's for full 30fps at highest bit-rate.
Sorry to sound obnoxious myself, but when you've had it for 9 months before anyone else knew where it's power button was, you tend to get that way.