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

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3answers
23 views

Can i split a microUSB to plug into the wall and computer

A USB has 2 power cables and 2 data ones afaik. If i were to split these and re solder them to make essentially a Y cable with one USB A for power and one for data, and then plug the power into wall ...
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0answers
19 views

auto power on after power loss after orderly shutdown

I configured my computer to auto power on after electricity power loss, through bios. But, I also want to auto power on my pc after electricity power loss after an orderly shutdown. for example if : ...
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0answers
9 views

Lenovo Y50 SSD upgrade - powering on issues

I recently upgrade my laptop (Lenovo Y50) from a 1TB HDD to an equivalent 1TB SSD from Samsung. I used EaseUS ToDo copying tool. When the computer boots up, everything works BEAUTIFULLY! Better than I ...
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1answer
20 views

Can I schedule a task when I hit power button on windows 8.1 tablet

I want to run a application before my windows tablet go to sleep/hibernate mode when I hit power button. Actually it should be triggered before entering sleep/hibernate mode but I'm ok if hooks power ...
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1answer
43 views

Is it safe to plug in a computer to a surge protector or a outlet? [closed]

I noticed that my old psu connector cable blew up beacuse of unplugging it correctly like pulling the connector off it was just the rubber peelling off and other rubbers with metal inside with ...
1
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2answers
58 views

Force laptop to use battery, not charger

I was wondering if it was possible to force a laptop running Windows to use its battery as the power source even when a charger is plugged in? If so, is it possible to switch between power sources ...
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1answer
25 views

Battery is shown as fully charged but does not feed the laptop

My laptop is a young Acer V11 Touch (V3-112P-P2E7). Yesterday I used it regularly on battery mode and I left it charging overnight. This morning's surprise is that the laptop only works when connected ...
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0answers
12 views

Turn off power to single USB port… Temporarily

I have a desktop running Windows 10. I have an led strip that is powered via USB. I would like to set this on a clock to turn on at a certain time and turn off at a certain time. Is it possible to ...
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1answer
25 views

Rename power plans in Windows 7?

Is there a reliable way to rename power plans in Windows 7? Creating new ones with a new names is not too hard, but some systems have dozens of power settings (including advanced settings) in each ...
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1answer
36 views

UPS suddenly restarting, what might be the cause?

Background My UPS has a backup of about 10 mins, thus, it's battery life is good. No problems detectable. My CPU, on the other hand, is also fine with no major hardware problems (as it looks so) ...
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1answer
26 views

Power supply or motherboard busted. How can I fix it quick?

A few days ago, my desktop PC just stopped turning on. Pressing the power switch elicits no response altogether. This is the sum total of the troubleshooting steps I've done: Super-newbily switched ...
0
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1answer
25 views

Did not unplug computer, power outage. Is it safe?

My office building is doing some maintenance work and they said they will shut off the power supply from midnight to 6am -- They told everyone in the building to turn off their computers and unplug ...
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3answers
29 views

Can software keep my laptop from charging?

I have a Lenovo S540 with debian testing (stretch) set up. A couple of days ago I noticed that the battery is not charging even when it's plugged in. Of course this could be a broken power cord of ...
1
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1answer
63 views

CPU running at 99-100% while idle

I am currently fixing a computer for my neighbor and it is running at 100% cpu power while idle. Is this normal? If not, how can I combat this issue? I never have this issue. I have a CPU ...
1
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0answers
18 views

Toshiba Laptop suddenly shuts down when on battery

I'd be grateful if someone coud help me. My Toshiba L845 laptop suddenly shuts down when on low battery. It doesn't hibernate in the usual way it did. It completly powers off, as if someone had pulled ...
0
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1answer
31 views

My computer shutdowns itself, how can I diagnose it?

I have a 5 years old Dell XPS 8100. A couple of days ago, it suddenly shutdown itself and then restarted again. Just like if there had been a power supply outage at home... except there wasn't one: ...
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1answer
21 views

PC turns on slow with an upgraded PSU to 800W from 500W

I've been using my rig (i7-2600, 16g ram, Radeon 7970, 500W) for the past 4 years without any problems. Recently I swapped out my 500W psu for a 800w psu 80+ ...
1
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1answer
37 views

How would I know if a hard drive was jeopardized by a power surge?

I have a hard drive, from which I have rebuilt the MBR and Boot Sector. I was able to recover the data. My client's computer and data were easily visible prior to a power surge in the home. She would ...
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0answers
20 views

Retrieve battery power level history in Windows 7

I recently bought a new battery for my Dell Inspiron 4050 running on Windows 7. It worked fine for 4 days. On the 4th day, I was using the laptop on battery power (80% charged) when it instantaneously ...
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2answers
28 views

Speakers connected to laptop make desktop monitor flicker

I've been wondering about the cause of this phenomenon for a long time and since I haven't managed to find a good explanation, I thought I'd post it here. My desk is in a corner, there's a radiator ...
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0answers
12 views

Change the functionality of Power Button [duplicate]

We know holding the power button for 4-5s the system shuts down. So Is this functionality of power button defined in BIOS or in OS. If in OS, there should be also a way of changing that, if so, could ...
2
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2answers
39 views

Can unplugging a VM be harmful?

We know that unplugging the power cable from a PC may damage your hard drive and may corrupt your OS. Could the same harm (or any harm) happen if I unplug a VM (simulated by Power Off option in VBox ...
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0answers
13 views

Perform Background Tasks in Low Power Mode - Possible?

Is there a way to schedule low power background activities to be performed while a computer is idle, sleeping, or even powered off? Until recently I would have thought the answer was unconditionally ...
0
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0answers
23 views

Laptop mouse power draw

I bought a mouse on amazon and one of the other customers was complaining about the mouse killing their battery incredibly fast so I tried to run the numbers and it doesn't seem to match my real world ...
0
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0answers
29 views

Very bizarre battery level behavior for Thinkpad T430s on openSUSE

Okay, so I've just bought a second-hand Thinkpad T430s from ebay. Everything looked fine, the computer's in good shape. After installing openSUSE, I decide to see how long the battery will last. I ...
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3answers
42 views

Computer switches off main power supply?

Ok so I managed to pour water all over my keyboard, mouse, monitor, and power boards. I've dried everything up, everything works except my monitor has water inside it making a little patch (i've ...
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0answers
34 views

Surface book startup slowness issues

I have a Surface Book i7 250GB I have 2 issues related to startup slowness. When I first start up the machine for the day, I'll hit the start button, the screen will show "SURFACE" then go black, ...
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2answers
42 views

New Computer, will not power up

I bought parts to build a new PC and there is a problem. I tested the power supply via the paper clip test and it works just fine. When I plug the PSU into the Motherboard however, no fans spin, not ...
0
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1answer
48 views

PC doesn't start. Power lights blink once

When I press the power button of my PC, it sometimes powers on. Most of the time, it gives a short flash and nothing else. Then I have to either press and hold the power button for about 20 ...
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0answers
34 views

Can a non spec conforming DisplayPort cable damage motherboard or graphics card?

I'm having some weird problems with my workstation, here are the relevant components: PSU: Corsair AX860i CPU: Intel Core i7 6700K GPU: Asus STRIX GTX970 RAM: G.SKILL Ripjaws V DDR4 2x16GB ...
1
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0answers
61 views

HDMI not working while plugging in Power charger to the laptop (works fine with battery only)

I have an Acer Aspire 6930 with Nvidia 9600m GT GPU, there is a weird issue that occurs when I connect the Acer Aspire to an LG TV with HDMI cable... the Laptop recognizes the TV and everything seems ...
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0answers
38 views

How do I turn on my laptop without the power button?

I have disassembled my notebook (first time doing so), and I want to test if it will boot. Reattaching the keyboard is a tedious task, is there another way ? My motherboard is the same as: I heard ...
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0answers
13 views

Polarity of battery and OEM power adapter reversed on Gigabyte p25/p35

I came across my battery's voltage amps and polarity, and found it interesting that the manufacturer shipped power adapter (adapter A) output polarity is positive, and the laptop's input polarity is ...
0
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1answer
38 views

What could be wrong with my laptop, which shuts down unexpectedly?

I've searched quite a few forums and questions on this website, but felt like none matched my exact problem. Simply said, my laptop shuts down without any notice. By 'shut down' in this question I ...
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0answers
18 views

Excel 2013 Power Query

Does anyone know how to extract all Active Directory Users and show which ones are Users and which ones are just Contacts. I've extracted both Users and Contacts but they seem to show the same in ...
1
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1answer
51 views

Can stripped metal on a power button ribbon be repaired?

I was struggling with a power button cable going into the motherboard (the clip was broken), and in the meantime I managed to strip the ribbon going into the motherboard. I reversed the cable and ...
0
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0answers
21 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 ...
0
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1answer
57 views

Laptop Power Button Won't Shut Down Stuck Installing Windows Updates

I have a Toshiba Tecra R950 laptop with Windows 7 64 bit. Last night it seemed stuck on the installing updates screen while shutting down. I let it run all night and it is still stuck. So I decided to ...
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0answers
42 views

per-vif tx power setting?

I am trying to change the tx power setting for my TP-Link TL-WN821N adapter for learning purposes. I tried this: iw reg set BO iwconfig wlan0 txpower 30 and this ifconfig wlan0 down ...
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0answers
24 views

Charge light on if display cable disconnected from motherboard

I have a HP DM4-1050ea laptop, which recently started to not turn on either with battery alone or AC alone (with and without battery). I cannot boot with battery alone because it's drained and don't ...
1
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1answer
40 views

Will multiple 12v rails “stack” to power a GPU that needs more than each individual rail?

I have a Rosewill Stallion 400 watt power supply, and it has two 12 volt rails: one with 13 amps and one with 14. Will this be enough to power a GTX 750 Ti, which requires 20 amps? The PSU has one ...
3
votes
1answer
49 views

max USB length for power supply

I know that normally usb 2.0 limit is 5m, but is there any difference how I use that cable? Can I simply extend cable longer than 5m if no data or audio transfer is required, just want to feed really ...
0
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0answers
40 views

Laptop battery full charged

I have a new battery pack for my acer aspire 4750 laptop, it hust a 2 weeks old, actually it is working pretty good. I use batterycare to check charge level, so while i am charging and it reached 80% ...
1
vote
2answers
39 views

Computer needs to “rest” after a power outage

My PC normally runs fine. After a power outage or a short-circuit, however, it can't be turned back on until some significant amount of time (>1 hour) passes. My case has LEDs that are on even when ...
0
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1answer
32 views

Restarting turns off monitor, but computer stays on

Since yesterday, my computer just couldn't complete a restart. I would click the Windows button > Power > Restart, and it'd go to the Restart screen. Wheel finishes spinning and the screen goes ...
1
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1answer
22 views

Computer stuck on bootloop

So i've had my computer for about 7 - 12 months now and its been working perfectly fine i have an i7, asus Maximus vii, 890w power supply sad, hard drive and gtx 780. Now the other day i was doing ...
0
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0answers
38 views

Dell Inspiron 15-5547 Shutting Down Immediately After Startup

I am working on servicing a friend's laptop, and I cannot find what the problem is. The reason that I started servicing the laptop was that he was having issues where the laptop would shut down ...
2
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2answers
49 views

Control Power To Multiple USB Devices

Problem I have multiple USB devices, (multiple power-only lights, a power & serial-data camera) that I need to control power to programmatically through a single USB port. Questions What ...
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1answer
57 views

Does the amount of free space on a HDD have an effect on power consumption?

I a couple of friends on Facebook have started spreading a message stating that if you delete 30 old E-Mails from your inbox it would save enough power to light a light bulb for 24 hours. They also ...
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1answer
25 views

Can I put my 8x plug in a 4x slot (CPU powering)

Is that okay or will that damage my hardware? Because I just got a new power supply (corsair vs650) with a 8x plug but my motherboard (h81m-plus) only has a 4x plug Is this fine or am I out of ...