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sidjoyner
Fanfold Paper
Posts: 7
Registered: ‎11-18-2015
Location: Chapel HIll, NC
Views: 28,730
Message 1 of 6

Yoga 3 Pro Won't Power On/Wake up. No Power LED.

I usually keep my trusty Yoga 3 Pro laptop beside me with the power cord plugged in at night in sleep mode when I close the lid. This morning when I opened the laptop to turn it on, nothing. Did not start/wake, no power LED either white or amber on side. There has been no trauma - water, dropped, etc - it just decided not to wake up this morning and no power LED is especially troublesome. I have tried to hold the power button in for an extended amount of time to see if it would reset itself, but nothing. My first troubleshooting will be to borrow a friend's known-to-be-working Yoga 3 power charger to see if my charger/power cord is defective/died. I doubt that's the problem, but that's the easy first thing to check. Since I bought the laptop from Lenovo in December 2015, I think the warranty is done, but not sure. (Any comments?) If the friend's charger does not power up the laptop, I plan to open up the laptop (first time for this particular laptop although I've opened up previous Thinkpads and other laptops literally hundreds of times) and disconnect the battery, push the power button for 20 seconds or so and see if there's a discharge that may correct the circuitry. I know I have done this successfully with older laptops. However, I know that Lenovo and other manufacturers are hard-wiring components and making it more difficult to work on. So here's my questions:

 

Will a Yoga 3 Pro power on with a functioning power charger connected and the battery disconnected?

 

Is it possible the battery has just died and that is preventing the laptop from working at all, even with the power charger connected? I do keep it plugged in almost all the time, but I'm pretty sure I used the battery saver setting in power management.

 

I'm really bothered that there is no power LED working at all with it plugged in. Is this indictive of something?

 

Any other suggestions/tricks to consider? This really happened right out of the blue, I've taken care of it like a baby.

 

Thanks for your help. (I love the laptop.)

Sr Support Specialist
Posts: 8,368
Registered: ‎11-30-2015
Location: PH
Views: 28,577
Message 2 of 6

Re: Yoga 3 Pro Won't Power On/Wake up. No Power LED.

Hi sidjoyner,

 

Greetings.

 

The hardware manual (page 19-20) offers power checkout that you can follow since at least you have done half of it using a known good charger.

 

Removing the battery and powering it on with just the charger should work to isolate if the battery is grounded so usually opening the laptop may be needed especially to identify other points of failure. Hoping there was no power surge, dc in port and cables would also need further checking.

 

Here are the hardware manual and service training module that you can review for next possible step.

 

Hope this helps.

Update us how it goes.

 

Regards

 



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sidjoyner
Fanfold Paper
Posts: 7
Registered: ‎11-18-2015
Location: Chapel HIll, NC
Views: 28,573
Message 3 of 6

Re: Yoga 3 Pro Won't Power On/Wake up. No Power LED.

Thanks for your reply and attempt at help. I had already downloaded the HMM. I have made progress, but it is very confusing, needing more tests. Here's the updated tests:

 

1. Got my friend's known good power charger and it did not start the computer, no power LED. Not surprised.

 

2. Opened the case, disconnected the battery for a few seconds, reconnected it, got a power LED and the computer started up. However, it reported "No Battery Detected." After a few minutes, the computer died again and went back to it's dead, no LED state, nothing.

 

3. Opened the case back up, left the battery disconnected much longer (15 minutes). Computer started up, battery detected this time. However, using my original power charger, it showed that there was no AC power connected, no charging. Swapping out to my friend's known good power charger, it registered on AC power and charging.

 

4. I repeated putting my power charger/cord on the computer and this time it reported "USB device just connected is malfunctioning." So I swapped out to my friend's power cable with my power brick and that worked properly (AC connected, charging). When I put my friend's power brick with my power cable, it once again registered "USB device is malfanctioning." From this, I am deducing that my power cable is defective, but my power brick is fine. I have ordered a 8.2 ft ZOZO power cable, hopefully it will arrive in two days (Saturday). (Always wanted a longer power cable, hope it works.)

 

5. Further confusing the situation, I was using a heavy duty relatively new 6 ft extension cord attached to the power brick to give me additional length. I have been using this with no problem for 2 months. Now it appears that neither my power charger or my friend's power charger will work with this extension cord. Swapping it out for another identical 6 ft extension cord, they both work fine. The suddenly problematic extension cord I had been using works fine anywhere else, including with other laptops. Bizarre.

 

6. Before I started all these tests, I ordered a new battery from Amazon in case the battery was the problem as I'm leaving for NYC Wednesday and wanted this problem resolved and was short on time. Now I think the battery may be OK, I've had no other problem with it suddenly dying, so far I'm deducing it's the cabling that's problematic. I tried to cancel the battery order within an hour of ordering it, but it was too late. So maybe it won't be a bad thing it coming anyway, because the way these tests are going, I'm waiting for the other shoe to drop. I don't know what problems I still may run into between now and it's arrival.

 

7. Finally, the torx screws SUCK. I usually don't have as much problem as I have a pretty nice tool set. But I've stripped a couple, one is stuck, impossible to get out, may have to drill it out. Any suggestions on replacement screws? Can I use more conventional M2 x3.3mm with philips head? I see Yoga 3 Pro screw sets on ebay for $15, but that's seem excessive for replacement screws.

 

Thanks for all help.

Sr Support Specialist
Posts: 8,368
Registered: ‎11-30-2015
Location: PH
Views: 28,555
Message 4 of 6

Re: Yoga 3 Pro Won't Power On/Wake up. No Power LED.

Hi sidjoyner,

 

Greetings.

 

Having the issue isolated with a known good charger (specifically the power cord) is a relief but would often be a usual point of failure aside from the DC in port since it would be the first point of stress with an incoming power to the unit. 

 

Bottom screw (part number MA00000T6G0 M2 × 3.3 mm, Torx, nylok-coated (10) 2.0~2.5 kgf*cm) is indeed pricey as I usually rather check with local computer shops and to ask for their spares (most of them collects it).

 

I usually place a rubber band on top of the stuck screw to try to remove but if you don't need to open it up maybe you can just get the campus IT to do it as they would also have tools and have them clean or reapply thermal paste if needed (for maintenance purpose). 

 

Best luck on your studies.

 

Regards



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sidjoyner
Fanfold Paper
Posts: 7
Registered: ‎11-18-2015
Location: Chapel HIll, NC
Views: 28,535
Message 5 of 6

Re: Yoga 3 Pro Won't Power On/Wake up. No Power LED.

So to conclude this support issue:

 

I have received the new 8.2 ft ZOZO cable and it works fine with the original battery (after disconnecting it for 15 minutes during troubleshooting as noted previously). So in the end, it cost me ~$12 for a new longer power cable- which I wanted anyway because the original OEM cable is too short. It was still a cost in aggravation/anxiety/troubleshooting/etc, but that goes with the terrotory of resolving your own technology problems. I'll be returning the new battery I ordered thinking that to have been a possible point of failure.

 

Lastly, I want to vent by once again reiterating the TORX screws SUCK. I eventually did get all 10 of them back in and somehow (after 45-60 minutes of hard work manhandling them with a Torx T5 and sometimes a T6) got them to where they are flush (or better) so they don't scratch up furniture. Thanks to spidey101 for all your help and encouragement - and the awesome advice regarding the rubber band. I never would have got them back in if not for that clever suggestion. I guess my irritation with the screws is that they were the worst part of the whole troubleshooting episode. If they had been easier to take out and put back in, the issue would have been rather easy to resolve. I just hope I never have to open this notebook again. (I doubt that will be the case.)

 

Unfortunately, I don't have a campus IT and no studies as I'm not a student. You may have seen that I live in a cool college town (Chapel Hill) and assumed that, but I'm a 60 year old man with my student days far in my past.

 

Thanks once again.

sguerra10
What's DOS?
Posts: 1
Registered: ‎02-07-2019
Location: US
Views: 3,613
Message 6 of 6

Re: Yoga 3 Pro Won't Power On/Wake up. No Power LED.

We noticed an issue where the sleep mode option was missing from the Lenovo X1 Yoga 3rd Gen running Windows 10 version 1803. This led to users inadvertenly letting the laptops's battery drain overnight and painfully learning that their laptop was dead on their morning commute. The solution to bring sleep mode back was to apply the following registry fix.

 

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\CsEnabled set value to 1

 

Then reboot the machine.

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