Unsolved
3 Posts
0
419
August 1st, 2021 09:00
Precision 7740 - Won't boot unless AC adaptor is connected
Hi folks,
I have a Precision 7740 and lately it has decided it doesn't like to start up without the power adaptor. Once it boots into Windows I can disconnect the adaptor and it runs fine off the battery.
Without the AC adaptor connected, it hangs on the Dell splash screen as startup and wont go any further.
With the AC adaptor connected, it still hangs on the splash screen and needs restarted 3 times and then restarted from the diagnostic app and it will boot into Windows.
I have tried removing the battery and holding in the on button to clear the memory, but this makes no difference.
Anybody got any ideas what this could be? I'm a bit annoyed because the laptop is the best part of £3000 worth and I only got it in December 2020!
Cheers.
ejn63
10 Elder
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30.8K Posts
0
August 1st, 2021 11:00
Since the system is under warranty, call Dell support and walk through their troubleshooting. It could be a bad AC adapter, DC power jack, or battery -- all of which are under warranty as long as there's no evidence of accidental damage (such as a broken wire or physically broken jack).
Enginerd
3 Posts
0
August 1st, 2021 12:00
I was keeping that as a last resort. The machine belongs to my work so they will need to do that but unfortunately that means a temporary machine for me with no software on it (it takes ages to deal with this) and the likelihood is they will try and rebuild my machine which will obliterate all the software off my machine which will need to be reset up. I'm in the middle of projects just now so can't be without my laptop so have been grinning and bearing it.........
AdrianG001
4 Operator
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4K Posts
0
August 2nd, 2021 06:00
Please check status of the AC adapter and battery health by follow steps below.
1. Power off system. Remove all peripherals (except AC adapter).
2. Power on system, quickly start tapping the F2 key continuously.
In the BIOS, AC adapter should be listed under the main tab or battery information. The adapter should say it type, if it says None or Unknown then it's an issue with the adapter, and most likely needs to be replace with a new genuine Dell adapter. Note: Please wiggle the adapter's end while checking it in the BIOS
The battery health should be listed under the Advanced tab or battery information. The battery health should say Your Battery Is Performing Normally or Excellent, any other message mean most likely the battery is faulty.