Hi,
Please do try these troubleshooting steps I suggested to others who had the same concern.
- Start by connecting your laptop onto an external monitor and observe if you'll also get that flickering issue on it.
- If it doesn't happen that means they replaced the wrong part because the problem would be either the screen itself or the ribbon cable that connects it to the motherboard.
- If the flickering does happen on the external display that means it's something to do with the graphics card itself.
- Do a clean install of the graphics card driver first.
- Go to Device Manager and uninstall the AMD graphics driver.
- Check Programs and Features then uninstall anything related to AMD.
- Next is to download and install the latest driver from the manufacturers site.
- Here's the link:
http/support.amd.com/en-us/download
- Reboot your laptop once the latest driver has been installed.
- After the reboot do test it again and see if the same problem will persist.
- If these steps will not work contact Lenovo for a repair.