If your son has the PS3 Slim Line 500GB CECH-4004C model and you have tried to update the firmware, you are likely to get error 8002F157. In this case, you may be able to solve the problem by turning off the proxy. If that doesn’t work, you can try these other solutions.
First, check whether your system is using the latest version of software. If it’s still bricked, you may have a software problem. To determine whether it’s a software issue, look for other users that have the same problem. Secondly, try to determine the exact reason that bricked your system.