Asus MG278Q no longer turns on, makes chirping noise every couple seconds

For about the last month the monitor would randomly black screen while gaming, then come back on. Now it won't turn on at all and will make a chirping noise like a dead smoke detector battery every few seconds. I've taken it apart a bit and it's coming from the board where you would plug it in. The monitor is over 4 years old. Was hoping to see if I could fix it before I recycle it.

Any help is appreciated!