▲ 4 r/Lima_Peru
participando como voluntario elecciones regionales lima, hagan sus preguntas
estoy participando por segunda vez como supervisor voluntario y espero sus preguntas e inquietudes
u/Immediate-Pay-9885 — 10 days ago
My Lenovo ThinkPad P1 Gen 3 is not charging; it only works when plugged into power.
This is my first time posting. It's a problem I've had for a long time and mostly ignored. It all started one day during normal use: I noticed the laptop wasn't charging. The battery indicator was showing, but the percentage wasn't going up. Eventually, the battery drained completely, and the laptop could only be used when plugged into the wall, without the battery actually charging.
The problem persisted, so I decided to buy a new battery. The result was exactly the same: it detected the battery and slowly drained it, but it never charged it. I ignored the issue for about a year until recently. I decided to finally fix it because I wanted to upgrade my equipment and recover some money by selling this laptop in fully working condition.
I took it to a repair shop specializing in motherboard electronics. Their diagnosis involved replacing a resistor with an oversized value, and they recommended buying yet another battery, as the cells in the current one were dead after sitting uncharged for a year. Confident that the issue was fixed, I bought another new battery, but the exact same pattern repeated. The charge just drained, but this time it didn't even show signs of recognizing the battery—it just consumed the power without showing the battery level or percentage.
I've already ruled out the BQ24780S charging IC by taking my own measurements, along with the charger, modules, and other components. I've been trying to solve this for almost a year now. It's definitely not a software issue, as I've completely ruled that out (I even booted into Linux to see if Windows was the culprit).
Recently, while taking my own measurements, I made a mistake and ended up burning a couple of capacitors in the battery input circuit shown in the attached diagram (PC8506 & PC8505). From what I've researched, these control and regulate the chip's charge. I am buying the replacement parts to install them, but that still doesn't solve my original problem, and I still can't find the main fault. I would really appreciate your comments and possible solutions.
The laptop still turns on and works normally, and I am in the process of replacing the burned capacitors.
u/Immediate-Pay-9885 — 1 month ago
▲ 12 r/AskTheWorld
How do you get from work/School to home?
Hello, Today I would like to share my daily experience in Lima, Peru. I usually take two or three vehicles to commute from work to home, and I spend two hours traveling. I'd like to share some photos.
How do you get from work to home?
u/Immediate-Pay-9885 — 1 month ago