Ds lite Memory chip Failure?

HI, I have a ds lite that, for somereason, has memory i belive to be faulty; though im not sure if its broken or not getting power to a certain part or cell with in the chip as the only symptoms are that it turns on, but doesn't complete the setup process. Would you guys know what i could do to solve this, and if i could replace the old chip with a more generic cell that will still interface with the cpu? Thanks in advance; pun not intended

It also doesn't have sound, though i dont know if that issue is related or not