Questions tagged [laptop]
Portable personal computer, normally with a foldable chassis
178
questions
0
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0answers
55 views
How can i reset the laptop battery BMS?
I have my laptop Acer Nitro 5 AN515-51.
But suddenly the laptop didn't turn on and only turns on when the power adapter is attached, so i checked the bms output voltage with my multimeter and it was 0 ...
-2
votes
0answers
24 views
Laptop turning on working fine but battery not charging and battery indicator not turning on [closed]
That means current flows from battery to motherboard but not from motherboard to battery.
I've checked there is no fault in power adapter and also power Jack se working fine checked by someone else.
I ...
0
votes
1answer
35 views
Charge Threshold on a Laptop
I have a feature called charge threshold in my laptop (It's pretty common for laptops to have them these days), it's like you set a limit to how much your battery gets charged once that limit is ...
6
votes
3answers
4k views
Do phone chargers communicate with the phone?
I have come across multiple YT videos (about the new higher USB power delivery and battery degradation) mentioning that chargers communicate with the phone or laptop when charging to avoid battery ...
0
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0answers
89 views
Can somebody give me a technique to power a laptop with AC to DC supply with connection to laptop battery pins
It's my first question here please bare my language and long paragraphs.
I have this lenovo R400 it was running without battery for 7 years. All of a sudden it turned off and didn't show any activity.
...
0
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0answers
68 views
Should the ground prong in an AC power cord carry current?
When I use a test light on my laptop charger's head, it turns on. That means it is shorted somewhere, right?
I used a 3 prong to 2 prong connector and inside it I connected the prong in the image ...
1
vote
0answers
35 views
How to detect pinout of trackpoint (probably ps/2) module?
I have following trackpoint module of recent thinkpad x390.
There are some info about older modules, most useful(combined) one is: https://deskthority.net/wiki/TrackPoint_Hardware
However, i found no ...
0
votes
1answer
52 views
Is there a way to utilize a old screen using electronics that can be handheld?
So, I guess this is a follow-up question to my previous one: Is there a way to output high quality pictures to a monitor with VGA using an Arduino?. Obviously, the answer did help me to get rid of the ...
0
votes
1answer
40 views
ASUS Laptop A/C Power Supply Output Doubled
My laptop power supply is rated for output to 19.5v, 7.7A.
However, it's kicking out 41.5v. Strange thing is that before I measured this voltage, I have been using it to power on my laptop and it ...
0
votes
1answer
97 views
Is it normal to have around 40 V in your body, when touching your plugged, ungrounded laptop?
I have had bilateral shoulder pain and then both arms and hands pain for around 7 mounts, which got much worse when I started working from home, with my laptop.
The ultrasound of shoulder muscles ...
0
votes
1answer
38 views
Using a plug-in timer to extend the lifespan of a laptop battery
My 3.5 year old laptop is suffering from a swollen battery despite having completed only 100 cycles. It's been plugged in for at least 18 months, which I read likely contributed to its degradation.
I'...
0
votes
3answers
50 views
Danger to laptop due to fan malfunction even with cooling pad? [closed]
My laptop fan makes noises that indicate to me that it is failing -- if I accident nudge it abruptly, it can become very noisy and even make a loud buzzing noise before it seems to shut off although ...
0
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0answers
31 views
Laptop's removable battery has 4 18650 3.7v cells in series, can I attach 8 more as external battery pack as 4s2p?
I have 4 years old HP gaming laptop with removable battery. I never kept the battery in the laptop. Right since the purchase, I stored the battery in a sealed pack in cold place, and charged it to 45% ...
0
votes
0answers
76 views
BTA16 (snubless version) triac was killed with 02 laptop adapter, please advice on how to overcome!
I found some threads asking on inductive load for triac can kill the triac with over clamping voltage, however, the thread is no longer open so let's me make a question here with a hope that the ...
0
votes
0answers
62 views
HP Pavilion connector identification
It is from an HP Pavilion x2 Detachable 12-b010nr 12" Laptop and I need to replace the connector, because one of the pins broke.
0
votes
0answers
69 views
No voltage at battery terminals
I replaced the cells on my Laptop unfortunately disconnected BMS while doing so.
HP battery check says each cell voltage and Temp correctly and calibration warning but can't calibrate as no terminal ...
0
votes
0answers
55 views
Controlling multiple switches using voltage
I want to use my laptop with the lid closed and be able to press its function buttons (including power on/off), i.e. shorting their pins, using a wired "remote control" with the same amount ...
0
votes
0answers
40 views
Using a li-ion battery instead of an AC adapter
I have a board that uses a 19v 3.42A AC adapter as a power supply and I want to replace that with a Li-ion battery. What should the voltage of the battery be? I ask this because my laptop for example ...
1
vote
2answers
515 views
Recommendations for building a dedicated external speaker from an older computer
I'm super excited to jump in and learn more about building an external stereo speaker from an older salvaged macbook laptop. I loved using the laptop to reference how my music sounded to get a better ...
0
votes
1answer
116 views
AC 50 Hz noise from an unplugged laptop?
I am now wondering how a laptop is powered when it is on battery. Let me give you some context: I am using a Mac Book Pro (with an aluminium case) for measurements with a very low signal to noise ...
1
vote
0answers
74 views
Winbond v/s ITE chip
My ASUS motherboard has both a winbond 25q64fvsig and a it8995e-128 chip. In a repair shop in a country I was at the time, they flashed the wrong ASUS BIOS version. I tried flashing the right version ...
2
votes
2answers
381 views
What is this black tape on my laptop's keyboard?
I am trying to replace the keyboard on my 2019 Samsung Notebook 9 Pro. I had to pull off a layer of black tape on the old one to get it out. The tape was glued to the bottom of the keyboard, right ...
6
votes
2answers
1k views
Can I clip an antistatic wrist band to an extension cord ground pin plugged into my wall outlet for laptop work? [duplicate]
I've done some small laptop stuff without the wrist strap, but I might replace a logic board of a MacBook and will be working on it for a long time. I have wrist straps and might as well use one.
I'm ...
0
votes
1answer
65 views
Which insulating tape and when?
There are quite a few tapes out there, from the plain black electrical tape to different color variations to Scotch 33+, 77, 88 to Kaptons (polyamide), I have also seen some velcro type wraps which ...
2
votes
1answer
925 views
Hacking Dell charger to run directly from an external 19.5V power source [closed]
I needed to power my Dell laptop without having 220V (because my inverter is burnt in the middle of nowhere) in my van.
By using a boost converter that can deliver the required power, I simply set the ...
2
votes
1answer
106 views
What models and brands can I find for logic fuses?
I'm trying to find logic fuses like the ones found here.
As I'm new user, I couldn't comment there, so I created this new question.
That fuse, in my case, is on a Clevo P170EM battery. This battery ...
0
votes
0answers
31 views
help verifying battery schematic
The diagram below is for wiring up a 6 cell laptop battery. Visually, there are four batteries in one row, and two batteries in a second row. The cells are the usual 3.7v 18650 cells. I am pretty sure ...
0
votes
0answers
51 views
Inside of Razer USB-C Charging Cable Layout
maybe you can try and help ,
i got Razer Blade Stealth 13.3" QHD+ Touchscreen Ultrabook,
my charger that is 65W with 20v with 3.25a for 20v,was broken at the end of the conector at the end of the ...
2
votes
4answers
563 views
Using different 18650 to repair laptop battery
Background: I have a laptop with a bad battery. Upon opening it up and testing the six 18650 cells that make up the battery, I found one to be completely discharged while the other five were still at ...
1
vote
0answers
45 views
Using 2 laptop power supplies to make plus and minus supply
I have set of M audio AV30 speakers that had a failed power supply (the transformer). I replaced the transformer with the closest thing I could find. The original transformer had a metal shroud ...
2
votes
1answer
128 views
Can I replace the original laptop battery with an OEM battery with higher voltage / power?
My original laptop battery is 11.1V and 74 Wh. It was starting to swell and needed replacement, but I bought accidentally bought a wrong OEM battery that is 11.4v and 71 Wh.
Is it safe to proceed and ...
1
vote
1answer
77 views
Which parts of this U.FL laptop wifi antenna need to be exposed?
I got these wifi antennas for use in a small metal computer case. I'm cutting some holes in the case to give the antennas exposure, but I'm not sure what parts of the antenna need to be exposed. As ...
3
votes
1answer
95 views
Will this DC UPS with off the shelf components for home network and laptop work?
I am trying to build a DC UPS to power modem, router which have power requirements of 12V 2A and a laptop which has power requirement of a 20V 3.5A.
I am planning to use a AC to DC SMPS which is ...
0
votes
2answers
44 views
What voltage should DIY laptop external battery have?
I want to make an external powerbank for my laptop, since its battery cannot be removed (MSI GP62M 7RDX).
What voltage should my battery have?
18650 elements have nominal voltage of 3.7.
My laptop ...
0
votes
3answers
188 views
FPC Connector - Matebook X Pro
Please excuse me if this is not the right place to ask this question.
I have been looking for a specific ribbon cable (motherboard to LCD board) for my Huawei Matebook X Pro for more than a year now ...
-1
votes
1answer
75 views
Did I Kill My Laptop? [closed]
My laptop takes a 19V adapter but I accidentally plugged in a 12V adapter and the laptop started smoking. I unplugged it after about a second. I read that if the polarity is correct and the voltage is ...
1
vote
2answers
233 views
Laptop HDD (100565308 Rev A) BIOS chip swap - chip won't come off?
I'm attempting to remove a BIOS chip from a Seagate Momentus 7200.4 HDD with a 100565308 Rev A chip number.
I've followed videos ...
1
vote
1answer
105 views
Can someone help me establishing the polarity of this dc jack on my laptop motherboard?
So my laptop charger port is fried and I wanted to establish the polarity of the points on the board so I can solder a off the shelf jack instead of the original one which is not available anymore. I ...
0
votes
0answers
67 views
What does this chip do? And I want to get a datasheet - Top markings include: Analogix ANX6212
What does this chip do? Top markings include: Analogix ANX6212
And I would like to get a datasheet, if possible.
0
votes
1answer
168 views
How would you connect a LVDS display to a laptop motherboard supporting natively a different display?
I'm planning a project of building a 4:3 laptop based on existing (modern) components.
As 4:3 displays are not manufactured anymore the idea is to take one from a old laptop, like a thinkpad T60. Then ...
0
votes
1answer
32 views
Turn on led backlight without a laptop
I'd like to turn on a broken laptop LED backlight without laptop and use it as light panel.
How can I do it?
Thanks
0
votes
0answers
97 views
Laptop charger voltage decreases gradually when plugged in, laptop won't charge
Recently, I tried to charge a laptop I had not used in a long time, but it didn't work.
I took out a multimeter and measured the voltage coming out of the laptop charger, a Delta Electronics charger ...
0
votes
1answer
183 views
Is it normal to feel shocks on corner of laptop
When working on my laptop connected to power and lightly touching the right corner with my forearm, I can feel small shocks which are uncomfortable, almost painful. Is this normal?
It happens under ...
0
votes
1answer
74 views
Without the use of any software, what would be the cheapest way to connect my broken laptop's keyboard to my desktop?
I am trying to use an old keyboard from a laptop as a new set of keybindable keys for my desktop. I will worry about software side later what I need here is this: How can I use the keyboard from my ...
0
votes
1answer
121 views
Safely powering Dell laptop from external Li-ion battery with a 11.1V/19.5V step-up converter
I need to build a power-bank type device for my Dell Latitude 6530 laptop (19.5V, 90W nominal power input).
I have 12 Li-ion 3.7V, 3.35Ah (18650-type) cells, 3S4P configuration (11.1V total output). ...
-1
votes
1answer
81 views
Do new laptop batteries require charge cycles before reaching full capacity? [closed]
I have purchased a new battery for my hp pavilion dv6500 laptop.
The description in the shop read that it should be a new battery.
Using Fedora OS, I did ...
0
votes
2answers
344 views
LCD screen: can this problem be caused by the inverter?
I'm repairing a HP 530 laptop with bad screen image. The image does not flicker, the corruption pattern is static.
If I connect an external monitor through the VGA port the image is fine, therefore I ...
1
vote
2answers
559 views
Charging a USB C device with fixed voltage / No Power Delivery/ Fixed dedicated Source
I have a lenovo yoga 730 13-ikb without a charger, it uses TYPE C usb charger with PD
specifications for the charger in online stores are:
AC Input: 100-240V ~ 1.5A 50-60Hz DC Output: 20V 3.25A (65 ...
1
vote
1answer
192 views
I took a old webcam from a laptop and connected it over usb, it does not work [closed]
The camera has 5 pins: 5v, D-, D+, GND and powerC.
I dont know where to plug power c in.
Can someone help me please, the camera is CNF9138_A1 By Chicony
0
votes
3answers
313 views
Using laptop charger with slightly higher voltage
I am wondering if it is safe to use a MacBook charger on my Lenovo laptop. Both devices charge via USB C PD. When looking at the voltages I can see that the Lenovo adapter is 20V - 3.25A
The MacBook ...
