Dell ac power adapter type cannot be determined

[Inforgalaxie]

Hi, there is a tipic problem on Dell but my is very strange.

On PU111 i have this voltages:

Pin1:0.78V
PIN2: 0V
PIN3: 3,19V
PIN4:3.07V
PIN5: 5V
PIN6:0V

PL3 have 3.19V

What you think that can be? SIO? because PIN6 is 0V?
I Attach schematic.

There is a way to solve this problem?

[Vesko356]

Re: Dell ac power adapter type cannot be determined

You can unsolder temporary PU111 and bridge pin3 to pin4 to see if it solve the problem, or check the charging DC in jack, there may be a poor contact between the center pin and the jack, if you are sure the charger is genuine and working.

.

[Inforgalaxie]

Re: Dell ac power adapter type cannot be determined

The Bridge PIN3 and PIN4 solve the problem...

I not have a new PU111.. The is any problem if i just bidge to solve the problem?

[Vesko356]

Re: Dell ac power adapter type cannot be determined

The Bridge PIN3 and PIN4 solve the problem...

I not have a new PU111.. The is any problem if i just bidge to solve the problem?

If you don't use a docking station, you can leave it like that, otherwise you must replace it.

.

[diamon]

Re: Dell ac power adapter type cannot be determined

Don't you have a other Dell motherboard laying around?.
Few days ago, I used a Dell E6320 motherboard (chip PU1) to fix a Dell E7240 motherboard (chip PU111).
The adapter did not get recognized in the bios, and with bridging pin 3+4 it did worked again.