Ps4 won't turn on. No beep or blue light

My friends Ps4 disk drive was jamming so instead of sending it back and getting it repaired with the warranty he opened it up and tried fixing it him self. The pins in the Disk drive were not aligned so he aligned them. He then put everything back together but when he tried turning it on nothing happened. It doesn't turn on there was no beep and no light. My friend ended up just buying a new ps4 and gave me the broken one to see if I can fix it. My first thought was that it was the power brick so I swapped it out with a new one but it's still not turning on. Is there anything that I can try? I've checked all the wires and they are all connected, I honestly do not know what to do next. Before he took the disk drive out it was working fine how it could it stop working? Please any help would beappreciated