Both errors refer to the SMC - System Management Controller, which is the power and sensors big boss in a Macbook. Troubleshooting an A1534 is not a stroll, cables are thin and fragile, more like an iPad than a PC.. the logic board is very tiny and with very high density in components. If you want it fixed best thing you can do is to find someone experienced with such boards and keep fingers crossed, not something for a DIY repair, there’s nothing you can do on your Mac without lots of experience and tools