I have my brothers laptop and have replaced the screen for him. It may not be relevant but I have also installed an SSD hard drive.
I removed the broken screen to get the part number to be able to order a new one.
While I was waiting for the new screen to be delivered, I connected a monitor via the HDMI port and installed Windows 10 Pro, anti-virus and anti-malware software along with numerous windows updates. All worked fine and the laptop had been rebooted several times.
However, I powered it off, connected the new screen, using the four screws to hold it in place, then powered it on.
The power light illuminates for anywhere from 2-4/5 seconds then goes out and that's it!
I attempted the "hard reset" prodecure I found posted on the boards, to no avail.
I have also disconnected the battery and reconnected it, disconnected the CMOS battery and reconnected it and finally removed and reseated the two memory modules installed.
So, I am unable to confirm the new screen definitely works but on the other hand it looks like it could be a motherboard failure just coinciding with the screen being replaced?
Is there anything else it could be or I can try?
I am confused as the laptop has been running the past two or three days while I have installed new hardware and a new OS.