My power light is also flashing orange. It's normally white, but now it flashes orange four times and then white. This happens for the entire duration that the laptop is turned on.
Funny thing is, it only started happening yesterday after my inspiron laptop was returned back to me from Dell. The battery has been acting up for a while now, the computer will only function if the power supply is plugged in; so Dell took it back for repair, but they didn't fix it, so there is no difference to it; now this light is constantly flashing. I know it's nothing to do with the battery, because the laptop thinks it's 86% charged...but when you take out the power supply, the entire computer shuts down. Dell said they'd send out an engineer tomorrow. If it's not fixed I'm going to demand a new laptop because this is crazy. The whole thing is worse off than before I gave it to them. Windows has also become very slow as well :(