U2CAMEB4ME
5 Iridium

ALERT! The AC adapter wattage and type cannot be determined. "Tutorial"

If you wrap the cord around the adapter for transporting???

Have it plugged in and bent to the side at a 90° angle???

This can happen to your AC adapter jack.

Today I was preparing an E6420 XFR for shipment to a customer.

While testing I use the AC on my bench that I know is good and tested.

The last thing I do is test an AC adapter to ship with the laptop.

And the very first one I tested this happened.

BadPin#1.PNG

So I thought I would take the time to show what the cause of this "Alert" can be.

First thing I did was slice a few inches of the cord from the jack back towards the AC.

And guess what I found???

BadPin#2.PNG

The wire from the "Center Pin" going to the AC adapter had worked itself loose.

Now everyone should know that this wire from the center pin carries no voltage.

The other two wires are for the 19.5 volts.

The center pin wire is for communicating with the system and BIOS.

That is why it gave the "ALERT! The AC adapter wattage and type cannot be determined."

BadPin#3.PNG

For demonstration purposes I just lightly soldered the wire back to the center pin.

Plugged it back in and powered on.

BadPin#4.PNG

And now the "ALERT" was gone.

Now this is not to say that every time this "ALERT" is displayed it is a broken wire going to the center pin.

It could also be:

1. The AC adapter.

2. The center pin is missing/bent in the jack.

3. A non-Dell AC adapter.

4. The DC jack on the laptop.

5. And some times the system board.

Best of luck and kind regards,

U2

HP EliteBook 8770w i7-3630QM 32GB
HP ZBook 17 G2 i5-4310M 16GB
HP Color LaserJet M553dn 40ppm
16 Replies
JOcean
6 Gallium

Re: ALERT! The AC adapter wattage and type cannot be determined. "Tutorial"

Very nice piece of diagnostic work and a fine tutorial.




-Forum Member since 2016
-I do not work for Dell
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Gaming on a home built with MSI B-460 Torpedo MB with an Intel i5 10400
Real work on an Inspiron 15 5575 and Latitude E5430
U2CAMEB4ME
5 Iridium

Re: ALERT! The AC adapter wattage and type cannot be determined. "Tutorial"

Thank you for your reply @JOcean 

I thought it was a subject that others would find helpful.

I have others that I plan to post in the future.

Best regard,

U2

HP EliteBook 8770w i7-3630QM 32GB
HP ZBook 17 G2 i5-4310M 16GB
HP Color LaserJet M553dn 40ppm
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LSUFAN51
6 Gallium

Re: ALERT! The AC adapter wattage and type cannot be determined. "Tutorial"

Good darn information here, hopefully everybody that have a problem with their AC adapter will take a look at this thread.

Thanks

U2CAMEB4ME
5 Iridium

Re: ALERT! The AC adapter wattage and type cannot be determined. "Tutorial"

Thank you for your reply @LSUFAN51 

I go through so many AC's a week and run into a few that are bad.

So I thought it was time to post what I found with most of the ones that give the "Alert"

The second most common failure is a bent or broken center pin.

Best regards,

U2

HP EliteBook 8770w i7-3630QM 32GB
HP ZBook 17 G2 i5-4310M 16GB
HP Color LaserJet M553dn 40ppm
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kajz
2 Bronze

Re: ALERT! The AC adapter wattage and type cannot be determined. "Tutorial&

good info, thanks. i see new genuine Dell adapters on ebay for $13...last year I soldered a genuine Volvo tailgate wiring harness....many many wires. fun: eek.  so i am capable. but for 13$ i will avoid becoming intimate with a center plug:)

 

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kajz
2 Bronze

Re: ALERT! The AC adapter wattage and type cannot be determined. "Tutorial&

they say genuine...  for that price  i wonder

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kajz
2 Bronze

Re: ALERT! The AC adapter wattage and type cannot be determined. "Tutorial&

btw i have a non-Dell adapter

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DJoeD
2 Bronze

Re: ALERT! The AC adapter wattage and type cannot be determined. "Tutorial&

Good find. Thank You.

For me solution is a bit simpler - trying to reposition the center pin and the matching center connector in the laptop with a match. It is because Dell has it's arms growing from their arses and not able to create a proper charging connector. The center pin in these connectors which tells laptop that the charger is original Dell's charger is crappy. When the center pin does not connect laptop thinks that charger is not original and decides not to charge.

Sadly it is not a permanent fix as the center pin from time to time gets loose andwiggling, adjusting it is necessary. Permanent solution would rewire or change the connecor on both laptop and original charger. But Ido not want to do that.

 

What do you suggest me DELL as a solution for your <Profanity removed> design fault?

 

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Chittu
2 Bronze

Re: ALERT! The AC adapter wattage and type cannot be determined. "Tutorial&

How do I remove that silver part out of the end of Adapter wire? 

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