12-11-2019 05:51 AM
I recently noticed the battery was around 50% when I last used it. I thought my wife forgot to plug it in so I plugged it up. The next time I went to use it, I noticed it was a little lower, but I had removed the plug from the wall. I assumed it was the power adapter, so I ordered a new (OEM) unit directly through Lenovo. It made no difference, the computer does not charge or recognize the power adapter is "plugged in." I tried some online solutions and verified conservation mode was off. I also performed a battery diagnostic test and it found no issues. I tried holding the power button for 30 seconds and while I did hear the fans turn on shortly, it didn't change anything. I also tried the NOVO button, but it did not seem to do anything at all. Lastly, I even removed the bottom casing cover and pulled the battery for a few minutes, but again not change. My battery is now extremely low (using my way older HP unit now) and not sure how much more I can do without depleteing the battery where I cannot power it to make any changes.
Is there any other way to power it besides the AC adapter?
Any suggestions on what is going on? Could it be the charging circuit on the battery? I don't want to make another assumption and replace the battery if there is something that will prevent that battery from charging as well.
12-11-2019 06:27 AM
Welcome to the Community,
Regarding the issue, It's possible that the power board which the DC port and battery is connected is the problem. Check if there is physical damage like missing plastic or bent pins as the computer should still turn on using the AC adapter only with or without the battery connected.
Hope this helps and let us know how it goes,
12-11-2019 10:18 AM
I didn't see any physical damage and the plug looked to be secure to the board. I had to leave, but will check for power through the harness to the board when I return.
12-11-2019 03:25 PM
I checked power and it appears there are two separate circuits. Both circuits have 20v. Even the board side of the connector shows 20v so it is getting power to the board. Any ideas?
12-11-2019 05:14 PM
I unplugged the battery and I do not have any voltage at this connection. With the battery connected the two pins on the left appear to be grounds, from the third pin I get 3.4v, 0v, 3.4v, 3.4v, 7.4v, 7.4v. This is the same whether I am plugged to the power supply or not.
What would prevent power from reaching this connection?
12-12-2019 12:34 PM
It's a possiblity that there's a short on the connection and power only jumps when the connection of the battery to the board is connected. It's really hard to say and usually with cases like this a technician should physically look at the parts for the issue. If it's still under the warranty you can contact support https://support.lenovo.com/uu/en/contactnow?linkTrack=homepage%3Ac1%3Ar2%3Acontact_us or if not, check for a local technician near you.
12-12-2019 04:50 PM
Unfortunately, it is not under warranty. It hasn't been used all that much so it really surprises me that I'm having issues with it. Do you know if it is possible to charge via USB or is the barrel connector the only option? Is a pinout of the motherboard available?
12-13-2019 06:26 AM