I had my Nexus 5 six years ago and it worked fine till the past 2 years, I had to change the screen, battery and the flex cable. I changed the battery two times before but I had to change the screen with digitizer because it had some damages.
After replacing all these stuff the phone won't boot and when plugging it into a charger it blinks for ~5 times Red LED then stops and nothing happens.
I think it might be motherboard problem but I want to check, I also tried to reach any repairshop but they keep telling me they no longer supporting the mentainance of this mobile phone and no one in Egypt would fix it.
I am really miserable but this phone means a lot to me, anyone could help me figure what is exaclty the problem??