Originally Posted by
a site on the net
To date there is no definite way to determine if a PSP has the dreaded newer motherboards: TA-082 & TA-086.
[Update] As of Jan 3, 2007, PSPs w/ TA-082 which have firmware 2.80 or below can be downgraded; However, newer motherboards still present challenges which make it something to avoid if possible.
[Update] As of Jan 30, 2007, PSPs w/ TA-082 which have firmware 2.80 (and 3.03 if you own an unpatched copy of GTA: LCS) can be downgraded without any known problems!!!