Have done exact the same, exact same problems. thank you for asking.. lets see.
Ok, I have read through these forums, and others, and have been unable to resolve this issue after trying like a million things. Here's my issue:
This is on a Dell Inspiron N4030 running Windows 8 Pro with Bios Revision A07.
On boot-up I get this message:
"The AC power adapter wattage and type cannot be determined.
The battery may not charge.
The system will adjust the performance to match the power available.
Please connect a Dell 65W AC adapter or greater for the best system performance.
Strike the F3 key (before F1 or F2 key) if you do not want to see this power warning message again.
Strike the F1 key to continue, F2 to run the setup utility."
If I strike F2 and go into the bios it says "AC adapter type unknown"
If I strike F1 to continue boot-up it boots into windows and then the battery indicator shows "Plugged in, Not charging"
In attempting to fix this issue I have:
1. Replaced the battery.
2. Replaced the motherboard
3. Replaced the Power Board
4. Swapped out the adapter with several other Dell adapters we have in the house (we have 6 Dell laptops). Adapter revisions used are A00, A01, and A02.
5. Did the whole rigamarole here: http://jeffreypalermo.com/blog/plugged-in-not-charging-windows-7-solution/
6. Tried various combinations of plugging/unplugging at different intervals and at different speeds that I have read on multiple sites.
7. Reset the Bios by disconnecting the battery and AC adapter and the holding down the power button for 20 seconds.
Someone please, please help me.
Thank you everyone,
Mine's a Latitude E5540 with the same problem.
Where am I supposed to find another E5540 to change the battery into? I don't know anybody who has one.
BTW: I know that my battery is entering its old age, so perhaps that enters into (or is the cause of) the problem.
Same problem here. I bought the XPS 13 9343 with I7 processor and touchscreen a year and a half ago. First i ran into WIFI problems and the as the WIFI card broke. That was replaced by Dell and I think this can happen so not a problem. Now since 2 month i got the message when i start up the laptop "AC power adapter wattage and type cannot be determined" . I changed the battery and changed the AC adapter. This cost me pretty much extra money but with no result. Dell Company do you have any solution for this? I see many people with the same problem.
Likely the data connection for charger identification is broken. It could be due to a problem in the charger (cable, plug - central pin?) or in the laptop (power socket, MB).
While trying a new adapter was a good idea, changing the battery was not. That's not the source of the issue.
If the adapter was OEM Dell and still not recognized, replace the DC jack next:
If that doesn't solve it, the mainboard is bad.