Hello colleagues, I ask for help with an HP 15-ax205ns, with a DAG35DMBADO Rev board which only starts with the power supply and with a universal charger, but with the original charger nothing, the id light comes on but it does not start, and that's it I have tried it with another original from Hp and neither.
-
-
Re: HP 15-AX205NS, no enciende con cargador original
AD_ID voltage?? -
Re: HP 15-AX205NS, no enciende con cargador original
603 mv with original charger
1.08 V with power supplyComment
-
Re: HP 15-AX205NS, does not turn on with original charger
What is the actual voltage from the original charger ?
What is the voltage used from your power supply that is working for your logic board ?Comment
-
Re: HP 15-AX205NS, does not turn on with original charger
19 vComment
-
Re: HP 15-AX205NS, does not turn on with original charger
The voltage of AD_ID will vary based on the power (current) that can be supported by the external power adapter.
Your external lab power supply works but is based on a different AD_ID value. This higher AD_ID announces to the logic board that the power supply is capable of powering the logic board.
The lower AD_ID is not suitable so the logic board will remain off.
Check against the specs from the HP datasheet for this laptop, what is the recommended power adapter and compare to the one that you are using.
Either way, the AD_ID has to be higher to function.Comment
-
I have Latitude 5420 that it's working fine on battery but when it's plugged on USB C charger it wont turn on.
Battery is charging fine. Also, if I connect the charger while laptop is on, everything is fine, it will charge.
The same thing if I connect to other USB C port.
Charger is OEM -
Hi guys,
I do hope this is not off-topic.
I have this mentioned HP dock which is half-defective, as it sometimes work and sometimes not. But that's not my main issue at the moment.
I don't have any more original HP charger, and I would like to "fix" the dock so I can use it without it. Has anyone tried it, or maybe does someone know how to effectively bypass the "comm" pin of the charger?
Maybe someone has a schematic that would be useful? There are markings on the board that say P&Q 2019 CM-4 94V-0 E162264, but when I try searching... -
This is a very weird problem and super annoying, so if someone who has experience with this, can explain why this is happening, then I will be grateful😁
This happen usually when the laptop has been moved. from one room to another OFF charger for some hours, but has also happened when laptop has been shut down and left ON charger over night, and not moved :
I turn on the laptop normally by pressing the power button briefly, then power comes on and Power LED and Fn LED turn ON/OFF constantly (no post and no beep codes)
If I(and this is my only option at this point),...09-29-2025, 05:58 AM -
I have a similar problem... I got an old MBP for free, but wont turn on... Only green light on charger. I measured these voltages. If i try to do an smc reset using keyboard, nothings happen, wont go out the green led. I dont know how to continue, please help me.
SMBUS_SMC_BSA_SCL 3.5V
SMBUS_SMC_BSA_SDA 3.5V
... -
Good morning, everyone!
I've gotten my hands on a few laptops with various defects because I want to get more involved in repairing electronics.
First up is a Fujitsu Lifebook U7511.
It won't turn on anymore and doesn't respond in any way when you plug in a power adapter.
Model: Fujitsu Lifebook U7511
CPU: Intel Core i5-1135G7
GPU: Intel Iris Xe Graphics
RAM: 16GB DDR4 - 3,200 MHz
PCB manufacturer: ASKPCB?
PCB serial numbers: CP801602, CP7984241-Z4, E239218, CP809978-01
Damage: Liquid damage
The liquid probably...11-01-2025, 03:09 AM
Comment