I want to uninstall firmware 2.80 cause it messed up the graphics of my ps3, I already reformat my hard drive but it didn't work

o man thats unlucky, i have no idea.

You would need to reflash the PS3 with the previous firmware. Which I believe would void the warranty

I dont think you can.

Shit I ws trying to reinstall version 2.70 yesterday but couldn't find it anyware, I didn't know that could void your warranty, that must be because of the psp and all the pirating

Have you tried totally refreshing your system by keeping your finger on the power button until the service menu comes up? It gives you a list of options to do stuff like fixing your PS3.

no actually, if you mess up the flash, you will brick your PS3. The warranty does not cover tampering with the firmware, or any issues that result from it. In fact, since it is easy to mess up, you will void the warranty.

that doesn't work, it bip two time then it restart

Call Sony. They should/may help you

You can't.

And if some how you figure out how, it WILL void your warranty...