Only Oneplus lets you unbrick your hard bricked phone without having to visit the service center. YouTube·Droidwin How to Enable and Use Read Back Mode in MSM Download Tool
until the tool displays a "Download Complete" or "Success" message. Reboot : msmdownloadtoolv2071rcsm full
If you want a legal alternative, I can:
Do not click "Start" yet. First:
Using this tool will wipe all data on your device. Only Oneplus lets you unbrick your hard bricked
Begin by downloading the MSM Download Tool v2.0.7.1 RC from a reputable source. Ensure you also have the appropriate firmware for your device. msmdownloadtoolv2071rcsm full