Just recieved a used adapter , pa-13, for my inspiron 5160. The light on the brick comes on indicating its getting power. In the power and in windows tho it does not recognize it, and the battery is not getting charged. I notice that when the laptop is off, and I plug it in all the lights in front blink for 1 second. I also get a message at startup indicating that the AC power adapter type cannot be determined. and it will prevent optimal system performance. My question is that its pretty much the ac adapter is dead right? I remember reading about how the eeprom on the brick can short out and go bad etc. Just wanna make sure.