A proper boardview file would let you verify these flaws in 10 seconds. Without it, you are flying blind.
The CM4 relies on a specialized chip (often the MXL7704) to regulate power. Locate this chip on your boardview. Check the tiny capacitors surrounding it. If any of these capacitors show zero ohms of resistance to ground on both sides, the PMIC or a nearby capacitor is shorted. Step 3: Verify the Activity LED (ACT) State cm4+94v0+boardview
BOM & schematic sync
The behavior of the ACT LED gives away the state of the system: A proper boardview file would let you verify