Electrical power is essential to the operation of any computer and any of its components or peripherals.

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Having a rough estimate of energy consumption of the computer.

I'm developing an app which needs to know about the energy consumption on computers (On windows). I realized the OS has no functionalities to support this directly, so my workaround is collecting info ...
2
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3answers
369 views

Combining multiple cables to increase current? (laptop charger)

I'm looking to use a simple USB power bank as a portable charger for my laptop (just to get a little extra boost if the battery starts running low at an inopportune time). My plan is to use something ...
0
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0answers
48 views

How can I know max power output of a power supply in a LCD tv? [on hold]

I would like to integrate an Atom mb inside a 22 inch tv. It fits there, I will take heat into consideration, etc. The mb will use a 12v DC pico psu. As the TV power source already supplies a 12V ...
17
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7answers
13k views

What is the 6-pin power connector on an HP ProDesk?

I have an HP ProDesk 600 G1 desktop PC, and I'm upgrading it with a new graphics card and a new power supply. Now, the problem I'm having is that the motherboard in the PC doesn't have a standard 24-...
0
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0answers
47 views

D-Link dwr-720 battery indicator

I got a wireless mini-router D-Link dwr-720, the picture used by manufacturer in their datasheets and by e-shops however differs from real look of the product: This is how it actually looks: As ...
1
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0answers
17 views

Dell Inspiron 3420, Charger Plugged in , Charging, But Battery Percentage not going up

I got a problem from last few days, searched every where for solution but all in vain. Description: I have DEll Inspiron 3420. When I plug in Charger,it shows charging but Battery level remains at ...
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1answer
2k views

Dlink DIR 655 - solid power light, is it dead?

I have a DLink DIR 655 that recently stopped working. All I can get is a solid power light. I've tried a few flavors of reset (hold down for 30s, hold down, pop out power cord, wait 15s, pop back in, ...
2
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4answers
744 views

2.0 speeds on USB hub?

How capable are USB hubs? I have an AirPort Extreme router with a printer attached (it's not powered by USB). I want to extend this and add two hard drives (one for Time Machine and the other for ...
5
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2answers
4k views

Surface Pro 2 / Windows 8.1 - Charging Issue

I purchased the Surface Pro 2 a few days ago (release day) and it has been running great, but over the last 3 days I have encountered a weird charging issue. I like to drain my battery down to near 8%...
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0answers
24 views

Enable Sleep Windows 10

I was trying to enable hibernate on my Windows 10 PC. (It was purchased as Win10, I did not update it from 7 or 8). I typed powercfg -h on in an elevated command prompt. When I shut down my computer ...
1
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1answer
22 views

What does Lexmark mean by 25W universal power supply?

I have a Lexmark x5650 printer/scanner combo but I lost the power supply when moving. Lexmark's site says the following regarding the power supply: Power Supply 25 Watt Universal Power ...
1
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1answer
508 views

Hp pavilion dv7 power button

My power button is non responsive I am getting LED for charging. I've taken it apart before to change the dc jack and it was fine and a few months later it just powered off. I try to power back on and ...
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3answers
4k views

Should my HP Pavilion dv6000 operate w/o battery pack while using electrical plug-in? Mine won't

While using my computer, it shut down, and I cannot get it to turn back on. I have tried removing the battery to see if the computer would work without it, but it did not. The light is on where the ...
2
votes
1answer
3k views

Laptop shuts off unexpectedly while in motion

Recently I've been encountering a very annoying problem during my commute in which my laptop unexpectedly powers off. I am using a Dell Inspiron 15 with a touchscreen. The laptop is just a bit over a ...
0
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1answer
45 views

USB ports not powered when laptop is off?

I just bought a brand new ASUS ROG Strix GL502VY and none of the USB ports charge my phone while the laptop is off asleep, as expected and advertised. I've googled the issue and can't find anything ...
2
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3answers
2k views

USB port not recognising mouse on first bootup

On a computer here when first powered on the USB wired mouse is not recognised. The light under the mouse is not lit up. Other usb hub's and keyboards work fine. Disconnecting it and reconnecting it ...
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0answers
29 views

Can I put a desktop Core-i3 CPU in a laptop?

This is a mirror-image of this question: Can I put a laptop Core i7 CPU in a desktop? I would like to buy a laptop that I will use mostly at home and at the office. I need a laptop rather than a ...
4
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2answers
33 views

Implications of AC power failure on suspended Linux box

My Linux box will be automatically shut down by the attached UPS if it is running and the AC power fails. If I have the Linux box suspended and the AC power fails, I assume the UPS can not shut it ...
0
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0answers
11 views

LAPTOP ports(VGA/USB) leaking current

My laptop battery is dead so i run my laptop on AC power.Whenever i place my laptop on my lap, i feel stinging sensation from VGA port time to time.It seems that the VGA port/usb port are leaking ...
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2answers
4k views

power button broken, DIY hacks anyone?

So, my laptop is a Dell model # pp39l. The little red wire connecting the power button to the battery is severed. Past warranty, tech support tells me it's a few weeks and a few hundred dollars (yuck) ...
0
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2answers
6k views

Dell laptop dies when unplugged but the battery appears fully charged

To expand on what I mean, I checked the voltages of each cell in the battery pack and they each read about 4.0v ea (6 green Li-ion cells in a 11.1v 53WH battery) and the total voltage reads 12.4v. At ...
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3answers
83 views

Dell running Windows XP automatically switching on

I have a Dell Dimension 5150 running Windows XP, it has a Intel Pentium dual core 2.8ghz processor and 2gb of ram. It also has 5 users, of which only one is an admin. The others are limited. Could ...
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0answers
36 views

External Battery Packs for gaming laptops/high power laptops

I have a Lenovo Y50-70 and I want to buy an external battery pack to charge it when I'm outside to extend the battery life, I want something like a full day charge (8 to 10 hours on would be fine, I ...
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11answers
8k views

Laptop sometimes shuts down when out of power causing me to lose my unsaved files

Why does it do this? Most of the time my laptop just goes to sleep when it gets to 0% power. But sometimes it completely shuts down and I lose my unsaved files. Is this a problem with my laptop? The ...
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0answers
34 views

Asus S500C laptop does not power on

A friend gave me an Asus S500C SonicMaster laptop because it would not power on. Thought I could get to working, but I'm at a loss. Took a multimeter to the AC adapter and it shows the specified ...
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0answers
16 views

Toshiba Satellite L850 power adapter

My Toshiba Satellite L850 power adapter gets extremely hot when I am using my laptop. I have noticed recently it seems to be getting worse. I make a point of unplugging it from the mains in case it ...
1
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1answer
27 views

Does disabling SSID broadcasting lower a wifi antenna's total power transmission?

Does disabling SSID broadcasting lower a wifi antenna's total power transmitted to the surrounding environment? If yes or no , I would be glad if someone could give me any reference or measurements: ...
0
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1answer
606 views

Dell Inspiron 1545 laptop - screen doesn't work: no power, brightness is 0%

There is a laptop - Dell Inspiron 1545. A problem is a brightness of a screen is 0% (when BIOS starts, Windows works - all time). I can barely see a picture on a screen at a big angle (it seems like ...
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0answers
44 views

Windows 10 sleeps fine from menu, won't sleep from timeout

I have a power meter on a Windows 10 box. If I sleep from the menu or the power button, it drops down to about 3 watts. If I wait for a timeout (set at two minutes) it blanks the screen but keeps ...
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1answer
5k views

AC adapter burnt due to high voltage spike but is my computer damaged because of this?

There was a high voltage spike in our area. My laptop stopped working and the little bulb in the refrigerator stopped working as well as an air coniditioner. When I touched the laptop I felt a ...
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2answers
60 views

Is it safe to use the 5v/2A charger on a device with 1.5A max input [closed]

I have a 8000 MAH rechargeable lantern with power bank, the max input is 1.5A. Based on my recent research, this is what I am concluding, please confirm if my finding 1, 2 are correct. #3 is a ...
1
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1answer
4k views

Change what closing the lid does, from the commandline?

I wonder if anybody knows a utility, or command, which can change this setting in windows in one click. I often need to change it on my laptop whether I want it to do nothing when the lid is closed or ...
0
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1answer
4k views

Compaq Presario CQ71 no power - power LED lights up briefly when plugged in

I have a Compaq Presario CQ71 which will not power on. When plugging in the charger, the LED turns on for about 10 seconds, and then turns off, no other lights turn on. Nothing seems to be happening ...
0
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0answers
9 views

View laptop power consumption without running it on battery

My laptop has a bad battery (lasts 20 - 30 minutes of normal use) but I need to see the max power consumption.I tried running Prime95 + Furmark on battery with power saving off (which took 50 watts ...
0
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2answers
7k views

Lenovo Yoga Unable to Power On

So I was watching some YouTube videos earlier and my computer suddenly shut off, similarly to what you would expect if it had overheated. I don't expect that it did overheat: I wasn't actively ...
1
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2answers
111 views

plugged in, not charging + ONLY runs on AC power

Laptop Model: Acer Aspire V5-473P Laptop Age: 22 months OS: Windows 10 (Upgraded 6 months ago) Problem Occurred: 5 months ago. Problem Description: Battery icon suddenly started showing "...
2
votes
3answers
3k views

Can you charge a tablet and use a USB device at the same time?

Most tablets only have a single Micro USB port that is used to charge the tablet, or can be used to plug in regular USB devices like a keyboard/mouse using USB OTG. I would like to charge/power my ...
0
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1answer
48 views

Laptop Battery Draining While Plugged In

I have a relatively new (<1yr.) Dell Inspiron 15 laptop, which stays plugged in all the time. It's connected to a flatscreen monitor via HDMI & I keep the lid shut, so that screen's off. ...
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0answers
22 views

Server is not responding and accessible

A long power cut happened and I have one server with a weird behavior. It's an HP DL145 G2 without warranty :/ Impossible to make work a vga port or any usb port, same with PS/2 port Impossible to ...
6
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4answers
22k views

Does the wattage on a power supply simply mean the max output wattage?

If I have a system running at ~500W of power draw, will there be any tangible difference in the outlet wattage draw between a 1200W power supply vs, say, a a 800W power supply? Does the wattage only ...
9
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3answers
18k views

Danger/Risk of Plugging USB Devices into Powered USB Ports

This question seems like it would have a logical answer, but I thought I’d ask to be safe. As shown in the photo below, there exist externally-powered USB hubs (A) and USB power-adapters—like the ...
4
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2answers
133 views

What happens during a hard reset?

What exactly happens when you hold down the power button and perform a hard reset? Does it involve only hardware, in the sense that it shuts down power and everything crashes in its current state? ...
1
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1answer
31 views

Hard power-off as a requirement. How to safely enable?

I need to configure a Ubuntu 16.04 Linux system such that it withstands being hard powered-off regularly. For regular operation there's basically no writing going on, so a read-only file system might ...
0
votes
0answers
26 views

ASUS K52J Laptop not turning on, no indicator lights, charger is good, battery is good

I have an ASUS K52J. The charger is good (tested on a second identical laptop). The battery is good (ditto). When the charger is plugged into the laptop, the charging indicator light won't turn on (...
36
votes
5answers
22k views

When do I need a pure sine wave UPS?

I would like to buy a rack UPS that would support all the IT related electronics in a SOHO room. This include switches, routers, PCs, servers, NAS. During my research I found out that there are ...
0
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1answer
36 views

Delay action for holding power button

So basically what happened is that sometimes accidentally press power button and it shuts down my PC. I went to Power options and pressed "Change what the power buttons do" and I can only change ...
3
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2answers
95 views

How to disable a USB port

For our RF Test Positioner System (illustrative example) I need to add a software-controlled fan. I would like to add a fan like this and simply turn off it's USB-power to turn the fan on & off. ...
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2answers
743 views

Power a USB HUB via USB Male to Male cable by borrowing power from other USB port?

Is it possible to power a USB Hub by plugging into one of the ports in the hub a USB Male to male cable, and the end plugged in another USB port of PC? Will the hub draw power this way?
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0answers
117 views

Windows 10 Will Not Shut Down

So I've got an issue that may sound like some of the others, but is actually different... I noticed a few days ago that my Windows 10 computer (updated from Win7 when 10 came out) will not shut down. ...
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0answers
15 views

HP Laptop not charging when working, doesn't start without battery - Windows 10

I have a HP laptop and yesterday I accidentally hit the laptop on the table. It was fine but when I charged it, it didn't charge at all. When it had 60% remains, the charging indicator showed white- ...