well you may as well reinstall the other ios on that cvs report of yours. I don't know which one could be giving you the trouble.
You can skip ios36 and 61 since you just install them
Install ios 9 12 13 14 15 17 21 22 28 31 33 34 35 37 38 53 55 56 57- without patches. Install the new versions
Ios70 is your system ios, you can leave it alone, or reinstall it with all 3 patches.
Use dop-mii
See if the resolves your black screens. If not, reinstall the HBC.
One of those ios must be your trouble. Probably a and ios3#, so if you like you could start with those and test.
You can skip ios36 and 61 since you just install them
Install ios 9 12 13 14 15 17 21 22 28 31 33 34 35 37 38 53 55 56 57- without patches. Install the new versions
Ios70 is your system ios, you can leave it alone, or reinstall it with all 3 patches.
Use dop-mii
See if the resolves your black screens. If not, reinstall the HBC.
One of those ios must be your trouble. Probably a and ios3#, so if you like you could start with those and test.