pandora issue

hi ive been using pandoras battery to unbrick about 5 psps. i bought a psp that i was told was bricked and when you try to boot the psp with the memory card and battery the power wifi and memory card lights just stay on and nothing happens. if i put it into another psp it works fine. the motherboard and memory card port on the board looks fine with no damage. is there something that could cause this? i would really appreciate any help. thank you

Yes, a badly corrupted nand will cause this issue and can cause unrecoverable bricks, usually due to people trying to flash themes in early 3.71m33 which resulted in corrupt nands and unless you had a nand backup could not be fixed. If you want to fix this psp i suggest a new motherboard, may be a hardware problem but i doubt it.