I have an issue with my Dell Inspiron 3521. My laptop stucked after a few minutes while turned on so i let a professional open it up, disassemble it and let him examine the issue. All the hardware is atleast working uptill now except for running for a long time. Anyways after he opened it up and evaluated that cooling jell was finished so i refreshed it from a repair shop. Now everything works fine except for my AMD Radeon 7670M. Dell diagnostics shows that everything is fine including video card but i don't know whether it is checking the internal one, Intel HD 4000 or the External AMD one. Can anyone help me here please?