Tirthankar Bala

I have HP d15-103tx Few days ago my laptop won't turn on , so I send it for repair , then I try to change HDD to SDD , laptop won't turn on , then again send it for repair , today I got it , running fine then I try to install HDD via caddy , laptop won't turn on , what is the problem , can any one tell??? I tried basic troubleshooting like discharging , without battery , ram clear, etc.