How to repair Voltas Split AC PCB

Hi friends during this video. I even have to elucidate the way to repair Voltas widow AC PCB.
if your ac not working and show E2 or E1 in display . so this video very use full
for you .
I have to elucidate what about if temp sensor bad or not working and what happen if fan speed not working properly .
compressor not working .
swing not working or PCB fully off