P350f V10a ROM LATAM, reflashed lately. I installed this ROM to be the same as it comes from factory, but without the carrier paraphernalia. Unfortunately, it is impossible to connect to carrier mobile network using this ROM, because it supports two technologies (can not remember which now) that are neither used for the carrier. So, I prefer to stick with a 100% functional ROM. I had flashed CM7 and MIUI 4 on the device, without complications. I have flashed other V10 ROMs without problems, including some of the Baltic Sea, as the V10G; again, more carrier things, then returned to the factory ROM, then to either ROM, ad nauseam and return to the factory ROM and start all over again. Yesterday, using the LG PC Suite IV, I made ​​an update available for this ROM (which I already knew it's the factory ROM). After going into emergency mode, there was an unspecified error in the upgrade program from LG and a warning to disconnect from the USB port, remove the battery, reconnect the device and reconnect to continue the upgrade (this had happened a year earlier, when I updated this phone for the first time, and before I started using other ROMs). So the phone doesn't pass boot. It show the LG bootsplash for some minutes, and then it shuts down. A friend who is a "guy who understand mobile" said I had to download a program to flash the device and format it (of course, gave no attention to that, Custom Recovery and KDZ Updater do the flash and no need to format anything). The device is no longer under warranty, and even if it was, I like to fix things by myself, especially those that go wrong after I move it. So if anyone has a walkthrough to resolve this, I am grateful for the help. And sorry for the bad, bad, Engish, who isn't my native language, and for the size of the post, but had much to clarify before getting to the problem.