A Persistent Rank Data error is an indication of low game bandwidth over the network, and thus lower game packets, while connected to a the Treyarch servers.
It's important to add the key CoD ports to your Router, as well as the Black Ops 2 port:
CoD (general for all games) 3074, 3075 - TCP/UDP (Both)
Black Ops 2 - 36081 (UDP)
You also need to make sure you've got the PS3/PSN or Xbox Live ports forwarded if you're using one of the consoles.
Yes, SpyNoMore has function called Custom Fix (patent pending), which is a very powerful system which removes any persistent infection.
delete the data and puted in your psp
In Emulators you can't fix the corrupted Data, Just in the GBA or GBA Sp
No, there is no way to fix overwritten data.
there is no other way to fix it.
Tell The Kid To Fix IT
If the black marks are dead pixels then you have to replace the screen you cant fix it.
If you get a black screen after installing mods, then it is a compatibility or incorrect install problem. If you get a black screen normally, force an update and this will probably fix it.
It means you have to fix your cache which is causing the data to not intake information
The simpliest way to fix it is by restoring it. If you don't want to lose all your data on it, bring it to a professial service to get it fixed.
How did it get broken?
Charge it.