Hello I heard some BAD news about OFW 4.83. If you update from a cfw firmware to ofw 4.83 your PS3 is Finnished. When you update your PS3 will not launch correctly again. You can fix this by flashing your nor/nand chip with an e3 flasher then install 3.55 ofw. If successful your PS3 should be able to update to 4.83 ofw with no problem or you can install cfw 
