This is a problem especially if you can’t get your hands on a Dell approved adapter. In this case it's likely a loose contact. The system will adjust the performance to match the power available. Inspiron 15 5000 series, battery is not charging: message says, ac power adapter wattage and type couldn't be determined my grandmother bought me a Dell Inspiron 15 , 5000 series , #5555 in October for school and I haven't had any problems til this week .. This is on a Dell Inspiron N4030 running Windows 8 Pro with Bios Revision A07. The DELL laptop reads the identification info during startup of when it’s connected while started.
If the pin is broken or damaged, the bios can't identify the adapter and won't allow charging of the battery. The default location is PAGE 1 address of 0x0008 to 0x0010 (DS2502 as the 1-wire eeprom) Below are what i … Move the cable, plug, jack if possible and see if the field is updated or intermittent.
The AC Adapter Type field in BIOS setup can be used to test the laptop DC jack, DC plug and the power cable for intermittent connections. If the field just says "Unknown Device Installed" all the time, try the adapter with a different DELL laptop - if it works in that case, it's most likely the host controller chip on the mother boards or the power adapter adapter jack that needs re-soldering. Please connect a Dell 65W AC adapter or greater for the best system performance. When the AC power adapter is connected and listed as "Unknown device installed" or the laptop battery is listed as "not recognized battery" One day it was fine and the next I got a BIOS message saying that the AC adapter is unknown. Please check AC adapter connect properly, remove AC adapter and plug-in it again, thanks. Help. The only thing to do is to get a new Dell AC charger from ebay. Hello, My computer refuses to charge with my original Dell adapter. So the DS2501 in the DELL AC Power Adapter contains the identification info of the power adapter. if you've encountered the message plugged in not charging on your dell laptop, this might be an easy fix. The pin identifies the adapter to the bios. This will prevent optimal system performance. If I connect the old AC adapter with my new laptop, my system shows following warning message at startup: WARNING: The AC adapter type is less than 130W or cannot be determined. BIOS battery charging diagnosis. It almost makes for a case to not use laptops manufactured by Dell but if you already own one and are using an un-original adaptor, you need a way to disable Dell CPU power throttling.
I know my motherboard is ok because if I plug&unplug the adapter it will work after a lot of tries.
Unknown AC adapter.
On boot-up I get this message: "The AC power adapter wattage and type cannot be determined. Dell Laptops will only receive 3 bytes of data for it to check the adapter. But it causes one slight problem! Power for the memory device comes from the laptop which is the same AC Adapter Identification wire, indicated as a “parasite power circuit”.
Dell wants me to buy a new one but it's expensive for me. Dell AC adapters have a central pin, like a coax cable. The battery may not charge.
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