500 watt Aukey Portable Power Station won't charge via any input

Based on what you described, this almost certainly isn’t a charger issue. Since you tried multiple chargers and the new charger works perfectly with the replacement unit, but this one still won’t recognize any input power, the problem is very likely inside the power station itself. The fact that it turns on and can discharge power means the battery isn’t completely dead. Most likely, the internal charging circuit or control board has failed. When that happens, the unit can still output power but simply won’t accept a charge.

I wouldn’t recommend opening it up unless you’re experienced with electronics repair. There’s a high-capacity lithium battery inside. If damaged or shorted, it can be dangerous and potentially cause a fire. It’s not worth the risk for a typical user.

Your safest option is to recycle it properly at an electronics or battery recycling center, such as a major retail store that accepts lithium batteries or your local hazardous waste facility. Don’t throw it in the regular trash. If you’d rather not waste it, you could list it online as “not charging, for parts only.” Some hobbyists or repair techs may be interested. Letting it sit in a closet long term isn’t ideal either, since lithium batteries can degrade or become unstable when left fully discharged for long periods.I hope my response has been helpful.