Questions tagged [laptop]

Portable personal computer, normally with a foldable chassis

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2
votes
2answers
131 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
667 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
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1answer
44 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
141 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
62 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
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0answers
25 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
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0answers
38 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
472 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
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0answers
36 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
43 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
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1answer
54 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
67 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
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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
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3answers
134 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
72 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
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2answers
108 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
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1answer
65 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
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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
41 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
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1answer
28 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
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0answers
33 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
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0answers
41 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
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1answer
70 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
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1answer
70 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
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1answer
72 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
1answer
84 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
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2answers
189 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
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1answer
130 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
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3answers
106 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
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1answer
61 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
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1answer
57 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
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1answer
64 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
810 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
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1answer
200 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
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1answer
59 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
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2answers
181 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
49 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
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0answers
74 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
180 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
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2answers
93 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-...
1
vote
1answer
66 views

Powering high-power laptop from DC without inverter

Context: We live full-time in an RV (a travel trailer) while traveling around the US. We have 300Ah of 12V Lithium batteries, a 3,000W inverter and 600W of solar. Although we have an inverter, it has ...
4
votes
5answers
1k views

Laptop failure due to constant fluctuation of AC frequency and voltage [closed]

I spend most of time on a boat (not on holiday :/ ) where a huge generator provides electricity. The potential problem is that the output is very dependent of the "mood" of the engine. Sometimes the ...
-1
votes
1answer
70 views

Using 12V to power a laptop which PSU is rated at 19V [closed]

I have laptop with a (dead)battery rated at 11.1V and a Power supply rated at 19V. I also have a 3s battery pack made with 18650 Li-ion batteries, meaning 11.1V nominal. Can I power my laptop ...
1
vote
1answer
149 views

Why are laptop computers usually powered around 20V DC? [duplicate]

Most electronic devices use 3.3V, 5V (all USB devices), 9V or 12V (very often for electronic music gear), and we usually all have dozains of such wall adapters at home. Even desktop computers have ...
-1
votes
1answer
38 views

Where does a wire labeled “3G” must be connected in turbo x notebook? [closed]

I got angry and punched my Turbo x notebook and it shutted down. When I opened it again I got the famous error 0xc00000e9. So I thought that possibly a cable is disconnected or the hard drive is ...
0
votes
2answers
122 views

Can anyone identify this capacitor?

I need to replace this capacitor on an Acer E5-571 Laptop motherboard. I'm trying to work out the ratings. I am no expert, but know enough to resolder a new capacitor. From what I have worked out, ...
0
votes
1answer
417 views

is it possible to get 20 volt 2a from 2 powerbank which have 5v ,2a 4x output?

is it possible to get 20 volt , 2 a from 2 power bank by connecting 4 usb port (each 5 v ,2.0a) . if can what should i use to prevent damage , short circuit , and catastrophic . i making a device ...
0
votes
1answer
58 views

How to make a power supply cable for a 10.5V 4.3A laptop OR how much higher voltage can I use

Let me preface this by saying I've spent countless hours researching and learning what I can about electronics before asking this, and I cannot find a clear answer to this. So sorry if this seems like ...
0
votes
3answers
537 views

Do I need a grounded electrical outlet for a laptop and computer monitor? [closed]

I am currently setup in a room with (2 pin) non grounded outlets (Canada). I am considering setting up my laptop and monitor. What risks would I be taking by not using grounded outlets with these ...