First of all you can't launch homebrew,games,apps any kind of program all will give blackscreen even toggle QA Flag will give blackscreen so you can't install lower firmware (noBD versions) if your console is not already QA flagged you can follow on of those two method depending one what cfw you are on or which method you see it easier for you ![:)]( "Smile :)")
How to Remarry BlueRay Drive on CFW PS3 Step by Step
First Method
- 1-Install...
How to Remarry BlueRay Drive on CFW PS3 Step by Step