PS3 no Red light only Beeps no power, but why?

Finding the reason why Ps3 is not powering on. Material: Heat Gun: PJLSW ShenZhen-JSH Store https://a.aliexpress.com/_EGMpFVh Flux: China DIYPHONE Store https://a.aliexpress.com/_EyjK5DD Blue Mat: Top Tool Store https://a.aliexpress.com/_Exvh9t1 Multimeter: GOOGZON Store https://a.aliexpress.com/_EjGsAcL