My LG LFX33975ST is not cooling at all

My LG LFX33975ST is not cooling at all My LG LFX33975ST is not cooling at all both Freezer and Fridge. The compressor was replaced today and it is still not cooling. The old compressor they took out was smoking literally. The fan in the back is working. There are no error codes. I even pressed “more ice” and “freezer” simultaneously still no error codes. What next? The PCB ? I pushed test on it once, I am not certain my board has blinking led lights?? The repair man comes back tomorrow. I was hoping to pin point the problem before he comes tomorrow. I can hear the compressor running.