2019 16" macbook pro that came to me for a diagnostic. it charged the battery up without a problem but doesn't power up. and with the battery detached it will show 20v and 0 amps on a usb-c amp meter. i went around the board looking for a short but found nothing obvious
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Good afternoom, my HP laptop with board Compal LA-G07JP only starts with battery but with something anormal :
- With only battery startup is normal.
- With only AC adapter same voltages but no EC_ON, no power up.
- Powered off AC adapter charges battery normally.
- With AC adapter charging battery as soon power on is pressed, charge is interrupted and laptop begins to run from battery.
No way to run from AC adapter. Which can be the reason?... -
Greetings everyone got an hp 17 ab laptop does not turn on with charger , but turns on with battery plugged in and charges only when the laptop is off mb DAG37DMBAD0 REV D... -
I have a Y50-70 gaming laptop. It has a problem where it charges up fine when the laptop is off, but when it's on, it doesn't.
I've tried a new 135w charger + new Lenovo battery and a new charging port but it made no difference.
I've updated all the drivers and still no difference.
Could it be down to a dodgy chip? I'll see if i can find a schematic and someone on here might be able to direct me where to test
Many thanks in advance.... -
Hello,
I have re-soldered the loose pins on the RAM slot which is a common fault on these models..
It charges and turns on the power LED but is missing several voltages like RAM and CPU do not come up which I believe is due to MAINON & SUSON being missing to turn these supplies on..
What I am un-sure of is what is the ITC chip waiting for to send out these signals, what are the requirements?
I have checked these lines in diode mode and they seam normal -> 600.
I have checked to see if they come on for even a fraction of a second... -
Lenovo Thinkpad W541 Wistron LKM-1 WS MB 12291-2 Works from the network and charges the battery only when it is turned off.
If you press the power button, the laptop turns on and works from the battery, but does not take power from the power supply.
If you boot into Windows and close the lid while working, thereby putting the laptop into sleep mode, the laptop begins to charge the battery.
even checked it this way: I bring a neodymium magnet to the Hall sensor during operation - the screen goes out and the battery starts charging.
Also, the laptop does not turn on without...
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