My bios don't have Secure boot option bcz it is old mobo
MBR Legacy Mode
I used Mac app - Etcher
Yes checksum is successfully correct
Yes, I have used Try Zorin, at that time also it get stuck in Black screen but later after few mintues it went up.
That could be a Point. It would be good to use a Tool what offers to choose to use GPT or MBR Sheme for the bootable USB Stick. When You have Access to a Windows PC, You could use Rufus because that offers that. Look at the red marked Area:
Seems like the Ati Radeon 6670HD is causing a problem, So, I pulled out the graphic card and now using the on-board graphic card which is ok for me, I don't play games or do heavy work, now booting is successfully without black screen. Thanks for the help.
Yes, I ran upgrade-grub and reboot, but not sure where is the problem. I seriously want to use the graphic driver but this may cause so much issue that I can't run it. I don't want to switch back to Windows