You might want to give a shot at an NoBD/NoBT (no blueray drive/No bluetooth) firmware.[br]
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PS3xploit -> flash memory
Evilnat 4.88 NoBd/NoBT firmware -> install via usb key
Install Multiman and try to launch it.[br]
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If it succeed at launching it, then u got dead Bluray Drive (BD) or a dead Bluetooth module (BT), without bluray drive no BT your PS3 won’t ever launch any app.