No network signal after charging board replacement

Hey there. I recently replaced the charging board on my E5 due to microphone failure. I used the newly bought part to to this. I followed all disassembly steps shown on one of youtube videos. Unfortunately, after replacing the part I found out that there was no network signal. When I put the old part back in, the signal was back on but I lost it again upon inserting the new board again. I thought maybe the antenna wasn't connected properly, connecting it to the new board was quite harsh, contrary to the old board where it snapped in smoothly. However, after inserting the old board back, the signal wasn’t there and now there’s no signal at all no matter which part In connect. Any ideas on what would be the problem? The microphone and charging port work good on the new part.