That sounds like you fried something inside. Different computers need different amperages and voltages from their power supplies. Just because the Mac charger fits, doesn’t mean it’s gonna work very well. You’re probably better off taking it to a repair shop, unless you want to disassemble the whole thing, inspect every single part for damage, desolder any burnt capacitors and transistors, solder on new ones, and when all of that inevitably doesn’t work, replace all of the damaged internals. Trust me, I know from experience. My PC’s motherboard was completely defective, and I spent weeks trying to fix it, and I never was able to.