How do I find two operating points from the board without using the keyboard
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I have a lenovo ideapad 5 14itl05, board LA-K321P, That will only power up on Battery only, or with battery disconnected and power adapter only. If battery is connected and usb-c power plug connected. It only works on battery and will not charge. I can however force it to charge by connecting the battery from a disconnected state while the power USB c plug is powering the laptop.
Additionally....to add to this strange situation. The usb-c power plug ONLY works to power the laptop on one side when inserted into the boards power usb c plug. If you rotate it 180 degrees, the board gets... -
Hie I have a Lenovo laptop
Lenovo Ideapad 100-14IBY AIVP1-AIVP2 LA-C771P rev 1.0
it's working only on the bench power supply when I put the battery it doesn't power on. when I also use the original charger it doesn't power. the batter Is fully charged, I used another laptop to charge the battery. but when I use a bench power supply it works perfectly
below are my readings
with the original charger only
JBATT1
PIN1 0.22V
PIN2 0.22V
PIN3 0.45V
PIN4 0.45V
PIN5 O.43V
PIN6 0V
PIN7 GND
PIN8... -
Lenovo Ideapad slim 3 not power on after consumer problems is can not on after sleep mode.
And the consumer asked for reinstalling OS.
I reinstalled windows 10 and working fine. After i leave it for updating windows and goes to sleep mode. Now it cant draw any input from power supply.
Motherboard number is GS450&GS550&GS750 MM-C821 REV: 1.0
Check the main power rail for 20v input ok
No amper input from Power supply 0.013a
Mosfet PQ201 20v and 26v ok.
3.3v exist
1,8v exist
5v exist
12v from baterai exist....09-30-2024, 09:42 PM -
Hi all!
I'm trying to troubleshoot a Microsoft Surface Pro (5th gen) model 1796 that won't power on. Motherboard model is M1007506-015. My priority is retrieving data, but the SSD is integrated so it looks like if I can't repair it it'll need to go to a data recovery company. I've done a little basic board repair before, but nothing this advanced until now. So please forgive my ignorance in advance. 😅
I found the boardview for this laptop in the forums here, and am able to open it on my PC with FlexBV.
https://www.badcaps.net/forum/troubl...-hardware-devi... -
Hi all,
TL;DR - this laptop is driving me nuts with the oddball power-related behaviors. Appreciate any insight you can provide!
I'm experiencing a power issue on an Asus Probook P5440UF-XB74. Although I've worked with electronics and computers for decades, this is my first attempt at getting into motherboard-level component troubleshooting. Any help the community can provide is greatly appreciated!
A few weeks ago I was using the laptop (on battery power) for a Zoom meeting. The battery was running very low (long meeting) but I wasn't worried about...
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