I advise that you delete all multiboot options, in the hard drive, and try flashing the imag3e again, either OpenBh 5, or other, leave it running, and see if there are any problems.
If it works perfectly then try storing multiboot images in a USB stick, and see if it then works.
The only way to locate the problem is through testing.
Have you tested a fresh installation, of openBh 5, on flash memory, without your Hard drive connected, or any USB devices, no plugins, or even your coax cables connected, just the basic image? If you can still access your menu, then the receiver has booted, and you can then leave it running, for some time, to see if it freezes, re-boots, or stops allowing you access to the menu.
Only by testing, from the very basic position, can you find out if it's a hardware, or software, issue. As you do not mention that the receiver is shutting down, just that it stops booting, I'm tending to lean towards a corrupt file, on your hard drive.
If everything is working then shut down, connect your coax cable, and manually scan in the satellite that you're currently pointed to.
You have provided very little information, regarding your setup, or if you can access the menu, or shut the receiver down, by holding down the power button, on your remote, for over 10 seconds.
Yes i tried 500 gb hdd same booting issue , while that hdd is working fine on another reciever zgemma h7s however the image open pli 7.3 is installed on flashHave you tried a different hard drive?
If I remember well (cause I dislike it) OpenPli causes many problems when installed in flash to other images installed in OMB.
Anyway, I think you should try to use also a USB stick as OMB device, in case there's something wrong in your HDD SATA port. Or you should also try a new SATA cable: although is a rare event, it might occur that a faulty cable makes HDD/SSD to work bad.
By a USB stick you can rule out this variable in the problem.