Questions tagged [laptop]
Portable personal computer, normally with a foldable chassis
166
questions
0
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0answers
27 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
45 views
BTA16 (snnubless 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
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0answers
59 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
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0answers
40 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
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0answers
52 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
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0answers
38 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
106 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
61 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
258 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
973 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
55 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
395 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
82 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
28 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
48 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
520 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
39 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
63 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
66 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
88 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
38 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
166 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
73 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
168 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
86 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
52 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
85 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
29 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
57 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
71 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
71 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
99 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
79 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
199 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 ...
0
votes
2answers
361 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
160 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
190 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 ...
0
votes
1answer
69 views
How to identify notebook motherboard parts that don't have meaningful description? [closed]
Recently I was trying to fix flooded laptop - Dell Inspiron 5370. After disassembling the motherboard (named ARMANI13) I noticed rust on one of the chips. Its location and surrounding elements suggest ...
0
votes
1answer
70 views
Why does (my) NUC/Laptop use odd (19V) power supply voltages?
Nothing comes to mind that really needs exactly 19V, with USB-C on board which can provide 20V it seems even a bit of a drawback to step up the voltage rather than increasing the PSU voltage.
-2
votes
1answer
90 views
Charge a laptop without explicit USB PD capability using USB PD
I bought a new laptop, the Xidu Tour Pro. It came with a quite bulky 19V 2.1A power supply that I'd like to replace. One review at a respectable site claims that the computer charges just fine through ...
3
votes
1answer
1k views
Can Computer Motherboards Work Fine Even With A Damaged SMD Capacitor/Resistor?
I'm asking this because when I was replacing my laptop battery, I accidentally hit and broke/disconected one SMD capacitor off the board, then I turned my laptop on, it made some weird electrical ...
0
votes
1answer
344 views
How to determine the model/type of SMD Capacitor and EMI Suppression Filters on a laptop PCB?
I am a newbie to PCB electronic components and I have the following questions on SMD on a laptop PCB. The picture below shows the SMDs around a m.2 connector for SATA SSDs.
1) The SMD in the red ...
0
votes
1answer
64 views
Does my laptop need powerbank with output voltage the same like my charger's or my battery's? [closed]
I have laptop (Acer Aspire 7745G) which has charger 19V-4.74A and battery 11.1V - 6,6Ah (73Wh). I'm planning to buy powerbank for it but I don't know what voltage would be okay. I'm looking to this ...
-2
votes
2answers
191 views
How much electromagnetic/electric radiation does laptop/computer emit? [closed]
How much electromagnetic or electric radiation does laptop emit? I don't know in what measurement system you have to answer, but at least, I want to get the answer which should be enough "research" ...
-1
votes
1answer
53 views
is it safe or not to replace my old laptop battery's cells which can increase its Ampere hours from 6600 mah to 13200 mah? [closed]
My old laptop battery's total designed power is 6600 mah and if i replace its cells from Samsung rechargeable cells 3.7V and 2200mah per cell.it will increase battery's power from 6600mAh to 13200 mAh....
0
votes
0answers
179 views
Why would a battery BMS refuse to function after cutting off the wires and reconnecting them?
I tried to rebuild my laptop (Dell Inspiron 5537) battery pack with new Li-Ion cells so I removed the case, disconnected the cell wires and connected those wires to the new cells. After this point, ...
5
votes
1answer
2k views
Why do laptop batteries have so many terminals?
Why do laptop batteries require so many terminals (upwards of 10 or more!)? Why not just a positive, negative, and a data pin?
All the phones I've used only have three terminals, and I would think ...
0
votes
1answer
316 views
Effect of submerging a laptop in isopropyl alcohol without removing batteries
It's common knowledge that water damage on many electronic devices can be mitigated using isopropyl alcohol at a high concentration.
Many guides have mentioned disconnecting the battery before using ...
0
votes
2answers
184 views
How does an “auto voltage setting” laptop charger work? [closed]
I recently came across a very interesting device for me, a laptop adapter that claims it adjusts its output voltage automatically:
https://www.trust.com/en/product/20194-plug-go-universal-90w-laptop-...
