AMD® APU A8-4500M AMD Radeon® Mobility™ HD7640G 1GB DDR3 HD 7470M Dual Graphics *2 VIDEO_TDR_FAILURE ATIKMPAG.SYS How to fix blue screen error or just use apu instead of display card
See if this AMD TDR article helps: https://www.amd.com/en/support/kb/faq/gpu-800
First I highly suggest you install the APU (processor with Integrated Graphics HD7640g) AMD Driver from your laptop's Support download page and see if that fixes the TDR BSODs.
If it does then try in installing AMD laptop driver if it is newer. Make sure your Windows is fully updated via Windows Update. AMD Drivers work when Windows is fully updated.
The APU AMD Driver wiil automatically install both the Integrated HD7640g and HD7470M drivers in your laptop.
Your APU is not supported by AMD Driver updates. You have a choice of two drivers to install: https://www.amd.com/en/support/apu/amd-series-processors/amd-a8-series-apu-for-laptops/a8-4500m-rade...
1-WHQL - 2015
2-BETA - 2016