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

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1answer
24 views

Powered Laptop Automatically Starting Up (Unintended)

I recently had a hardware failure and replaced my hard drive with a new one. Then having done a fresh install of Windows 8.1 (which then was upgraded to Windows 10). I'm having the same issue ...
27
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13answers
80k views

Can a power failure or forceful shutdown damage hardware?

Can computer hardware suffer damage from forceful shutdowns (holding the power button for five (5) seconds) or power failures? I believe that normal PC hardware does not suffer from this - after ...
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0answers
24 views

How can I repair a power supply for a Apple's Power Mac G4?

This is an attempt to gather a reference page for anyone trying to replace a failing PSU from a Power Mac G4 with an equivalent ATX in the future. There are still a couple of pages -luckily- ...
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1answer
13 views

Graphics Card For Dell Optiplex 790 SFF [on hold]

I was looking into the AMD Radeon HD 6450/6570 cards but I understand that there is a small power supply in the small form factor and I am limited to low profile graphics cards. Would either the 6450 ...
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5answers
45k views

How much power does a hard drive use?

This is not as straight forward as it sounds. Specs from Western Digital's site for a WD 3TB Green Drive: Read/Write 6.00 Watts Idle 5.50 Watts Looks fine right? Look at this part of the spec: ...
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1answer
3k 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 ...
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3answers
33 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
27 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
141 views

Dell XPS 1330 / 1530 - Won't turn without power lead, but you can remove power lead once turned on?

As the subject states, I can't turn on my dell xps 1330 without the power lead in. There is nothing from pressing the button. It has a newish fully charged battery and have tried a couple of good ...
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0answers
445 views

DELL n5010 randomly powering off

I have a Dell N5010(Inspriton 15R) laptop. The laptop will run for a while (10 mins) then cut out, I at first thought this was a overheating issue. This issue still happens even the the BIOS I've ...
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2answers
4k views

Dell inspiron n5010 has failed to recognize AC adapter

Recently my dell inspiron n5010 has failed to recognize my 90W adapter (despite powering it just fine). Full error message: "The AC power adapter wattage and type cannot be determined. the ...
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2answers
393 views

USB devices prevent computer to turn on

I have a dell optiplex 960. If I plug in 3 usb devices (keyboard, mouse, printer) all to 3 usb ports next to each other (there is a row of 4 and a row of 3 on the back of the computer), It will not ...
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1answer
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 ...
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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
21 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 ...
44
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14answers
18k views

Is it safe to power on a motherboard outside of its case?

I have a new motherboard which needs a BIOS update to support a new CPU. Thankfully I have an old (compatible) CPU handy. My plan is to install the old CPU, update the BIOS, then install the new ...
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1answer
26 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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1answer
396 views

Why does my Samsung laptop computer think it is unplugged?

Samsung laptop, purchased new in 2012. Windows 7 64-bit. 8GB RAM. Model NP300V5A. I woke up one morning and woke the laptop. I had left it plugged in to the wall the night before. When it woke, it ...
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1answer
44 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 ...
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2answers
59 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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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 ...
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0answers
13 views

Turn off power to single USB port… Temporarily [duplicate]

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
28 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 ...
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3answers
23k views

How much power does a Western Digital Passport Essential SE require?

I have looked at the Western Digital website for my product (WDBACX0010BBK) and cannot find how much power the device requires. The device is not recognized when I plug it into my keyboard's USB hub. ...
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2answers
826 views

ThinkPad X220i appears to power on but won't start - no BIOS or beeps

I have a ThinkPad X220i laptop here (4-5 years old, out of warranty) that won't power on any more. Looking for any tips to get to the cause and repair it. The problem: When you press the power button ...
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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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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 ...
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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 ...
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1answer
37 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) ...
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
2k views

Disconnecting a USB device without unplugging it

I'm modifying my desktop computer case and I want to plug everything into the USB ports in the back of it. However, the ports are not easy to reach and sometimes I have to unplug some devices because ...
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1answer
4k 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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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 ...
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4answers
7k views

Can't a USB hub power keyboard and mouse at same time?

I'm trying to use a Dell mouse and keyboard via a single USB port using the USB splitter hub, but the devices seem to misbehave. Just one of the devices work when I connect both. I figured out it's a ...
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3answers
160 views

PC restarts on power outtage despite having a UPS

Unfortunately where I live I do not have 24/7 electricity. My new PC rig which is considered to be a high-end(gaming) system is connected to a brand new APS/UPS that have these specs: DC-AC ...
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1answer
64 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 ...
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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 ...
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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
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 ...
0
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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+ ...
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1answer
5k views

Dell Latitude E6400 power button and wireless not working or only working intermittently

The power button on the laptop stopped working randomly as of a day or two ago. I can only power the laptop on if its attached to a docking station, on which I can use the power button to turn on/off ...
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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
7k views

Can I charge my laptop using a power bank using my laptop charger?

I have a Dell XPS-1530 laptop with a 9 cell battery. It's working fine but I was just wondering whether I could use a power connector or something to plug my laptop charger's 3 pin plug into another ...
0
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2answers
29 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 ...
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6answers
19k views

Is there a USB power consumption meter?

For example, how could I measure the normal power consumption of my USB keyboard? After I get my statistics, I may easily notice when a hardware keylogger gets installed, by the changed power ...
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2answers
40 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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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 ...
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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 ...