HP India — Laptop is not start properly

Respected Sir/ Madam
I Registered one complaint regarding my HP laptop.It not start properly only power light and caps lock light blinking but my laptop is not start.My case I'd is [protected]. My laptop problem is not resolved till date. One technician from your site visit my home on 9th September 2021 he told that such problem is due to moisture he open my laptop and clean my RAM with eraser and told me your problem is solved.But I face same problem again and again even I call hp technical support team end number of time but no one receiving my call.My laptop is up to date regarding BOIS and others.Please provide me technical support for solve my problem