I would suggest doing a search for laptop motherboards and just matching port locations and size since most manufacturers won’t make two motherboards for one product line.
Are you sure that it’s a bad motherboard?
Have you replaced the system battery on the motherboard? Have you tested your power supply (if the MB isn’t getting power no way in hell it will work…)? Have you checked the connections? Cleaned or exercised the connections recently?
Hope this helps!