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Laptop randomly putting off

Anonymous Wed 26 Nov 2025 16:29:49 No.1549956 View View Reply Original Report

How do I find what is the defective piece? It could be the battery, the transformer (normally it's not that, I tried switching with another one I had and the issue keeps going), transformer's connector, what else could it be?
I don't think it comes from my electric circuit since my other devices, fridge, box etc don't disconnect.

I feel there are actually 2 issues there. The battery not detected (because even if the electricity didn't come anymore, it would just go on battery for 5sec, the screen would become darker) and the electricity not being taken anymore.

What do I need? Ammeter? Voltmeter?

Anonymous

Anonymous Thu 27 Nov 2025 00:03:41 No.1549992 Report

Quoted By: >>1549993 >>1550045

its probably the connector in the laptop.
I had a laptop once where the connector where I plug in the power cord had a loose connection and it would randomly loose power when you moved the cable at all

Anonymous

Anonymous Thu 27 Nov 2025 00:04:51 No.1549993 Report

Quoted By: >>1550045

>>1549992
the same laptop also had horrendous battery life like yours.
its just something that happens when batteries get old.

Anonymous

Anonymous Thu 27 Nov 2025 05:48:53 No.1550017 Report

Quoted By: >>1550050

>>1549956
Don't call it a transformer, it's not a transformer. It's a power supply. It probably has multiple transformers in it but it will have multiple capacitors too, and ICs and resistors and diodes...

Remove the battery. If the device doesn't start up or powers off unexpectedly then it's probably the power supply or connector is faulty. The battery might be faulty too.

install software if needed that will let you access the power info like charge state, charge current, battery voltage, supply voltage, battery capacity/battery health, instantaneous power usage, etc.

If you say you've tried multiple power supplies, then it's probably not those, but you can gently tap or jiggle the wire to the laptop to see if that make or breaks electrical connection.

But the big issue is that Li-ion batteries don't last more than a few years. and especially batteries that aren't in a case can swell and break connections inside your machine as well as break the components and even the case. Let me guess, I don't know your model but I bet it's one of those stupid ones where the designers have made the battery pack accessible only by ripping off the keyboard. Gone the days where could just swap out a spent battery for a fully charged battery or rip open the battery case and replace the 18650s yourself.

Another issue is heat. You computer might be getting too hot and just need to shut down without notice.

A degraded battery under load might have a sudden critical drop in voltage due to internal resistance sucking up too power and power off without warning.

But I don't know. There are just so many things it could be. If you battery is more than 3 years old that's the first thing I'd look at though.

>What do I need? Ammeter? Voltmeter?
If you need to ask if you need them then that says you don't have them and that says you don't use them enough to know what a sensible reading would be, so I'm going to say no, you don't need those.

Anonymous

Anonymous Thu 27 Nov 2025 11:08:02 No.1550045 Report

Quoted By:

>>1549992
>>1549993
Thank you for your answer. I'm not sure we have the exact same issue although. Mine doesn't go off when I move the cable, and goes off even if I don't touch it.
I would like to know of a way to spot the defective piece for sure.

Anonymous

Anonymous Thu 27 Nov 2025 11:39:57 No.1550050 Report

Quoted By:

>>1550017
>It's a power supply.
Alright.
>Remove the battery.
>install software if needed that will let you access the power info
Alright. I'll do this.
>but you can gently tap or jiggle the wire to the laptop to see if that make or breaks electrical connection.
Moving the cable doesn't put it off. Probably not this.
>Let me guess, I don't know your model but I bet it's one of those stupid ones where the designers have made the battery pack accessible only by ripping off the keyboard.
I'm using it rn, I'll open it later.
>Gone the days where could just swap out a spent battery for a fully charged battery or rip open the battery case and replace the 18650s yourself.
Yeah I remember buying a battery 10 years ago with double the original capacity. It would level up the computer because it was twice the size of the original one and in a weird S shape.
>Another issue is heat. You computer might be getting too hot and just need to shut down without notice.
Alright. I Downloaded BatteryInfoView.
Current capacity: 0.0%
Power state: Charging, AC Power
Battery health: 27,8%
Number of charge/discharge cycles: 0
>A degraded battery under load might have a sudden critical drop in voltage due to internal resistance sucking up too power and power off without warning.
Sounds like it. I'll try to find the temperature. GPU is 133°F/56°C rn.
>But I don't know. There are just so many things it could be.
Yeah that's why I asked about the ammeter and voltmeter, to investigate the defective piece.
>If you need to ask if you need them then that says you don't have them and that says you don't use them enough to know what a sensible reading would be, so I'm going to say no, you don't need those.
You're gatekeeping me from repairing my computer? :o
I have this although:
>https://cdn.imgchest.com/files/f3822269fac8.jpg

Anonymous

Anonymous Thu 27 Nov 2025 21:21:22 No.1550085 Report

Quoted By:

I suppose it could be the extremely dead battery messing something up with its ability to power itself. try removing the battery and using the laptop just plugged in. see if that fixes the issue.

if the issue persists, then it could be something very difficult to troubleshoot.
it probably isnt the connector since you say moving the cord doesnt make the power cut out
it probably isnt the power supply since you said you tried multiple.

the only thing I can think it would be then, is an issue with the motherboard.
it could be a broken wire or solder joint that connects and disconnects with thermal expansion
it could be a defective chip component that makes the power distribution circuity behave erraticly
both of these would be pretty difficult to find, especially if you're not knowledgable with electronics

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