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Ssoniccomputers
Fanfold Paper
Posts: 21
Registered: ‎09-19-2018
Location: US
Views: 626
Message 191 of 198

Re: yoga 910 battery not charging

Just so you know, I am communicating with you currently on the 910 that I diagnosed and repaired and it's good to go..Capture2.PNG

sl55
Paper Tape
Posts: 4
Registered: ‎02-19-2019
Location: AU
Views: 625
Message 192 of 198

Re: yoga 910 battery not charging

perfect that's great info there..  might take me a while to get my head around it, but definitely what I need to get me troubleshooting properly instead of stabbing in the dark!

Ssoniccomputers
Fanfold Paper
Posts: 21
Registered: ‎09-19-2018
Location: US
Views: 620
Message 193 of 198

Re: yoga 910 battery not charging

Yep, very likely the same scenario with all of the 910's, obiously a widespread problem which while it sounds crazy is actually a great thing as it gives more clues as to the cause and potential solution.  As it is I replaced to mosfet with one out of a newer gaming laptop and I'm assuming it'll last for a year or so before failing again.  This rework process takes skill and proper equipment to do correctly without damaging the board and causing other issues.  I use a Quick 861DW and it's fast and easy but then again I do this stuff all day long repairing Macbook Pro/Air boards.

Ssoniccomputers
Fanfold Paper
Posts: 21
Registered: ‎09-19-2018
Location: US
Views: 613
Message 194 of 198

Re: yoga 910 battery not charging

Do as I did and test all the mosfets while they're on the board and i'd be interested to find out if it's the same one or not that failed on your unit.  Also, careful with the ribbon cable connector on the top of the board that connects the usb c board to the motherboard on the motherboard side I noticed that it's fragile and failed so I had to fix that as well.

 

scizen
Paper Tape
Posts: 4
Registered: ‎01-27-2019
Location: US
Views: 525
Message 195 of 198

Re: yoga 910 battery not charging

Ok, so here's my update to my 910's failure to charge.

 

I have 2 separate and identical 910's so I can do some process of elimination.

I have 3 chargers that work perfectly on laptop A, but laptop B will only charge at 5V. B takes 2+ days to charge.

I replaced the battery in B. No change.

I bought a new charger for B. No change.

I upgraded the BIOS and tons of drivers, including uninstalling the battery in the Device Manager. No change.

I purchased from LeNoGo, waited a month, received, and installed a new USB daughterboard. NO CHANGE!

The probem persists. 

 

Come on LeNoGo...there's clearly a hardware defect in the 910 and we need some service.

 

sl55
Paper Tape
Posts: 4
Registered: ‎02-19-2019
Location: AU
Views: 490
Message 196 of 198

Re: yoga 910 battery not charging

Well I finally got around to opening her up,  I believe fet's 20 & 15 have failed, but I stumbled on a bigger problem,  chip on the far right bottom corner is clearly l blown, I'll attach a picture...   I'm guessing this one is a proprietary chip and not sourceable?  

Trekkin70
What's DOS?
Posts: 1
Registered: ‎06-15-2019
Location: US
Views: 164
Message 197 of 198

Re: yoga 910 battery not charging

I have the exact same issue and it showed up within a month of my extended warranty expiring; which was in Jan 2019. 

 

I love the laptop and am at a loss of what to do. It's hit or miss if it's charged and I can use it and need it for our small business. Can't afford to replace it.

 

Why isn't Lenovo doing something about this?

gimme2more
Ctrl-Alt-Del
Posts: 10
Registered: ‎07-21-2017
Location: US
Views: 138
Message 198 of 198

Re: yoga 910 battery not charging

Hey there @Trekkin70

 

Welcome to the club and I'm sorry Smiley Sad

 

As far as I know, Lenovo is doing nothing to address this issue.

 

I spent a little money trying to fix this issue only to have it happen again so I read through this thread and came up with something that works okay for me. I bought a third-party charger that charges really slowly, but reliably. It works whenever my laptop decides to be temperamental. It's the Anker Power Port 2 and I carry it with me always.

Best of luck.

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