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Power error message
Warning: 70 Watt (20V, 3.5A) AC adapter detected. System will not be capable of running in full performance mode without a 90 Watt (20V 4.5A) AC adapter.
Press F1 to continue booting in battery optimized mode, or F2 to shut down.
Hello I am getting the message at start up and it appears that the batteries aren't charging also, this is on a C840.
I have tried purchasing a new AC power charger and that didn't work. This problem is everytime I boot up the system
HELP
Thanks in advance
Krazy123
4 Posts
0
September 22nd, 2003 19:00
I had already updated to BIOS A12, and purchased a new 90Watt charger/adapter and that still hasen't worked. I also did a ALT-F at the setup screen. nothing seems to work
The laptop worked fine up until 2 weeks ago and then this just started happening.
The batteries are still at 20% and 40% but are not charging. I ran the diagnostic on the chargers and it said that everything was OK.
The green battery charging light isn't lit anymore either.
Thanks
DELL-BobT
3.1K Posts
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September 22nd, 2003 19:00
Krazy123,
Thank you for using the Dell Community Forum.
You are receiving this message because you are using the 65 watt adapter. You need to use a 90 watt adapter with your system to not receive this message. Try resetting or updating the system BIOS.
Krazy123
4 Posts
0
September 23rd, 2003 00:00
Bought a new power supply from Dell item 9R733 still won't charge the batteries. both batteries show solid green lights when I push the status button on them.
What should I try now?
Thanks
Message Edited by Krazy123 on 09-24-2003 08:24 PM
medic6446
1 Message
0
March 8th, 2004 16:00
Press F1 to continue booting in battery optimized mode, or F2 to shut down.
I am getting the above message at start up and it appears that the batteries aren't charging , this is on a C840. I am using the Power Supply supplied with the computer, and everything was Ok until last week. I have no idea what caused this....Does anyone have a similiar experience?.....Help.....Thanks.....Tom
Krazy123
4 Posts
0
March 8th, 2004 23:00
I didn't get an answer
so I purchased an external battery charger.
gardnerd12
1 Message
0
March 15th, 2004 03:00
CSchrank
3 Posts
0
March 15th, 2004 10:00
We just had a similar situation with a D600. Had the mother board replaced and still didn't work. Dell sent a new power supply(which is different than the one that came with the laptop) and all works.
Serial no. on power supply that came with laptop is CN-05U92-16291-3AT-079H REV A03
Serial no. on new power supply is TH-C2894-17971-41G0FH Rev A01
Cheryl Schrank
RoninIsMe
6 Posts
0
August 19th, 2004 02:00
washpatech
1 Message
0
January 13th, 2005 05:00
DELL-MikeB
563 Posts
0
January 13th, 2005 13:00
selbyclark
4 Posts
0
November 13th, 2010 00:00
My Dell Latitude C840 displays the same "warning: 70 Watt (20V, 3.5A) AC adapter detected" error message even with a known good 90 watt AC adapter is connected. It also won't charge the batteries anymore.
The laptop is clearly not under warranty anymore, but it was/is a really solid machine and I would like to repair it if possible. Does anybody know if this is the internal power supply that has failed and is it a replaceable component or is it part of the motherboard?
Any info on parts availability or even locations to send it for repair if I can't do it myself would be greatly appreciated.
Thanks,
Selby