You probably flashed a psp 2000 with a(TA-085 V3) or a psp 3000 with a (TA-090 V2)

those motherboards are NOT flashable.
once you flash one of those motherboards, you have broken your psp beyond repair.

to get custom firmware...(and i hate gen because of extreme bugs)...on one of the above, use chickHen r2 +5.03 GEN for HEN.