Hi Dee-u,
Welcome to Sony Community!
We're sorry to hear that after several attempts to fix your laptop the issue still persists. You mentioned that the power LED light was on but there was no indicator light for the hard drive. You may refer to this link for additional troubleshooting steps, https://us.en.kb.sony.com/app/answers/detail/a_id/34849/p/48903,49902,56714,56719/c/65,66/kw/no%20post
For further assistance regarding your concern, please contact the Sony offices/Sony representative offices nearest to your place of residence in Asia Pacific region http://www.sony-asia.com/countryselector.html?hpid=countryselector:AsiaPacific. Due to proximity, they are in a better position to respond to your questions or concerns.
Regards,
Jen
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