cancel
Showing results for 
Search instead for 
Did you mean: 
Reply
ShockFace
Fanfold Paper
Posts: 12
Registered: ‎07-15-2017
Location: US
Views: 4,557
Message 1 of 49

Flex 3-1580 Battery Charging/ Power Issue

Hey like many others I'm having some issues with my FLEX 3-1580. Issue: The battery originally would not charge above 15%, now it will not charge above 14%. The battery light near the power button is on, and the charger works (tested with DMM). Sometimes I get a constant on and off between the computer detecting the power cord. This makes the screen flash back and forth in brightness going from plugged in to unplugged (This is remedied by disabling Microsoft AC Adapter in Device Manager, meaning it then stays "plugged in", still doesn't charge). If the battery is not plugged into the laptop it will start on AC Adapter after many attempts of 2 second boot/stop/boot/stop. Attempts: I have checked the voltages from the power cable internally to where it plugs into the board. The top two connectors get the 21V. The CMOS battery is at 3V. I reapplied thermal paste. I reset all connections. Looked for component burn marks but couldn't see any. I know other laptops have had issues with the MOSFETS but I could not find any MOSFET on the motherboard. Ran registry fixer with CCleaner. Updated all the drivers. Flashed newest BIOS In the end I don't know if its a software problem and something seriously got messed up by a virus in my registry or somthing.. Or if there is something on the motherboard that is bad.
Support Specialist
Posts: 2,948
Registered: ‎02-22-2017
Location: GB
Views: 4,486
Message 2 of 49

Re: Flex 3-1580 Battery Charging/ Power Issue

Hello ShockFace

Thanks for using the Lenovo forums.


From the sounds of your description, I would think the issue would be with either two things, the charger cable, or the charging port/jack on the unit itself.

 

As this is having trouble being recognised in the unit, it may be the indication to the problem.

 

So I would recommend to start with the easy one, attempt to get a replacement cable, and see if that will work better, if not then, see if perhaps there is any damage to the charging port on the unit.

 

Perhaps a pin is missing from it, something along the lines of this.

 

 

Hope this helps, let us know how you get on.


==================================================================================
Did someone help you today? Thank them with a Kudo!
If you find a post helpful and it answers your question, please mark it as an "Accepted Solution"!

 

This will help the rest of the Community with similar issues identify the verified solution and benefit from it.



 

 

Pesszimistának lenni a legjobb, vagy igazad van, vagy kellemesen meglepődsz...
ShockFace
Fanfold Paper
Posts: 12
Registered: ‎07-15-2017
Location: US
Views: 4,482
Message 3 of 49

Re: Flex 3-1580 Battery Charging/ Power Issue

I've actually tried a different cable. I've also used a DMM to measure the voltages going into the battery and out of and they are normal. At the cable plug into the motherboard it's 21V. Then about 19V going in to the battery and 11V coming out which seems normal? 

 

Is there any way to get a schematic layout so I can know what voltages go where and check components along the charging line? 

 

I'll check the connections again just to be sure. 

ShockFace
Fanfold Paper
Posts: 12
Registered: ‎07-15-2017
Location: US
Views: 4,461
Message 4 of 49

Re: Flex 3-1580 Battery Charging/ Power Issue

Upon further inspection I found what I believe is the culprit. Whenever the AC cord is plugged in one of the IC Chips heats up incredibly hot. The chip is the 1275C TI 598 A202. It's located near the CMOS battery and the hard drive. 

Does any one know how to find that chip? 

mindflare
Blue Screen Again
Posts: 29
Registered: ‎09-18-2017
Location: CA
Views: 4,284
Message 5 of 49

Re: Flex 3-1580 Battery Charging/ Power Issue

Hi. Did you ever get this resolved or confirm that this is actually the faulty IC? Any chance you took a picture of the IC in question?

The TL598 is a power supply control (voltage regulator) IC by Texas Instruments, so this could be the culprit.

These are inexpensive chips and are available from reputable electronics parts suppliers like Arrow.com (https://goo.gl/fiQZPN) and DigiKey.com (https://goo.gl/s6Ro76).
_____________________________________________________
Twitter: @MindFlareRetro  |  YouTube: youtube.com/MindFlareRetro
ShockFace
Fanfold Paper
Posts: 12
Registered: ‎07-15-2017
Location: US
Views: 4,275
Message 6 of 49

Re: Flex 3-1580 Battery Charging/ Power Issue

Hey! So I ended up ordering the TI chips I stated to attempt the replacement but my friend remembered he bought it from CostCo and they have a two year warranty policy so he just got a refund instead. 

I'm fairly confident that chip was part of/ or the main problem though. It was shorted out, and it makes sense based on it's purpose in DC circuits. 

Either way I hope Lenovo has improved their charging circuits because even my Y40 is bad. I can't recommend this brand anymore :/

mindflare
Blue Screen Again
Posts: 29
Registered: ‎09-18-2017
Location: CA
Views: 4,272
Message 7 of 49

Re: Flex 3-1580 Battery Charging/ Power Issue

Thanks for your quick reply. Mine is from NewEgg.com so I'm on my own. I think I will order a couple of the TL598 ICs and replace the one you cited. Thanks again. I'll post an update when I've made the repair -- hopefully, it works and this info can help others.
_____________________________________________________
Twitter: @MindFlareRetro  |  YouTube: youtube.com/MindFlareRetro
ShockFace
Fanfold Paper
Posts: 12
Registered: ‎07-15-2017
Location: US
Views: 4,265
Message 8 of 49

Re: Flex 3-1580 Battery Charging/ Power Issue

Hold off on buying those ones with the links you sent me. They aren't the chip I noticed is an issue. It's a 1275 C surface mount chip. I'll send a link..

https://m.ebay.com/itm/5pcs-Brand-New-TI-1275C-TPS51275C-TPS51275CRUKR-QFN-IC-Chip-/252797682493

 

It's location on the motherboard is just inward from the power button. About an inch just below the HDD. Pretty small.

ShockFace
Fanfold Paper
Posts: 12
Registered: ‎07-15-2017
Location: US
Views: 4,265
Message 9 of 49

Re: Flex 3-1580 Battery Charging/ Power Issue

Here's a link to the part spec sheet. It's the surface mount square one. 

https://www.google.com/url?sa=t&source=web&rct=j&url=http://www.ti.com/lit/pdf/slusb45&ved=0ahUKEwiV...

 

I have some that were sent to me from China that I'm never gonna use and I got for free. I could send you one in the mail since they are so tiny. 

mindflare
Blue Screen Again
Posts: 29
Registered: ‎09-18-2017
Location: CA
Views: 4,258
Message 10 of 49

Re: Flex 3-1580 Battery Charging/ Power Issue

That would be great. Thank you. Can you DM through Twitter, @MindFlareRetro, for address info and so I can reimburse you for postage?

_____________________________________________________
Twitter: @MindFlareRetro  |  YouTube: youtube.com/MindFlareRetro

Check out current deals!


Shop current deals

Top Kudoed Authors