I have a Dell studio 1737, and out of nowhere, I get a popup message in Windows that tells me that I need to have a power supply that meets Dell's requirements.
Like others I can power the laptop and use it just fine with the adapter. The blue LED in the adapter end that plugs into the laptop is lit up. When I unplug it and plug it back in, that the LED on the laptop itself, which indicates that the battery is charging or charged, initially lights up but only for about a second. Then it goes off and the dialog box pops up.
Tried a lot of things. Restarting the computer. Unplugging the adapter from the wall. In the BIOS, it says it's unrecognized as well, so Dell is rejecting it's own adapter at a hardware level on the motherboard. If there is some kind of "chip" in the adapter that Dell looks for and rejects if not present, then apparently that chip has failed (Burned out? Static electricity got it?)
If this is the case, then it's a prickly move by Dell to add hardware for the sole purpose of requiring you to purchase only their product directly from them at an inflated price, and then to have that part of the device fail when it actually is a genuine Dell that I purchased from them.
Dell wants $66 for a replacement adapter. Just bought one on ebay for $8.18 on ebay.
Update: Plugging my adapter into a friends Dell laptop works fine. Plugging in his adapter in mine fails in the same way. Removed battery from my laptop and plugged in cable. Same problem.
So I've concluded that it's not the adapter. It's not the battery. It's the laptop itself that seems to be the problem. Thank you Dell for making a fussy motherboard that decides to stop recognizing a perfectly good, genuine Dell AC adapter.