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

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1answer
22 views

Is it possible to make a laptop behave as if it is working on battery?

Is it possible to make a laptop behave as if it is working on battery, while in fact it would be working on AC power? I have some HW problem with my laptop. It reboots for unknown reason every time ...
0
votes
0answers
11 views

U2442 laptop no power

I have a gigabyte U2442V that does not power up when I press power button... No LEDs are on. For some reason before its death I had to keep doing static discharges to make it work... A while after ...
-5
votes
0answers
21 views

solar system is really free? [on hold]

one of my friend said he has solar system on the roof of his house and it is free installation and no payment on the system. Just pay set amount monthly to solar company. I did not believe. Is there ...
4
votes
3answers
28k views

How can I disable the beep when I plug in/unplug my laptop's AC adapter?

My Packard-Bell laptop is emitting a loud, annoying beep when I connect or disconnect it to/from an AC power source. Whether I have headphones plugged in or not does not change anything; the sound ...
0
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0answers
12 views

How can I fix my pc after power failure during windows updates?

I was executing windows updates on my pc. The power failure was caused by the main motherboard power connector. A prong on this connector was bent enough that it was wedged into the motherboard and ...
-1
votes
1answer
31 views

Does an external hard drive draw more current writing or deleting files?

I have an external hard drive that is powered off of the usb connection to my Raspberry Pi. I use it for Time Machine back ups so it is almost always writing data to the external hard drive. However, ...
0
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0answers
17 views

Restore open applications and files after a manual restart

Sometimes when I log in to my pc in the morning it has restarted (possibly to power cut or updates?) and all my applications such as SQL Management Studio, Visual Studio(s) etc re-open any queries, ...
2
votes
1answer
24 views

Surge Protecter's Grounded Light Turning Off

I've got a new PC setup in a new apartment (built before 1980s), however the surge protector I have is doing some funny things. Any help would be appreciated. When I plug the surge protector into a ...
0
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0answers
23 views

How do I turn off that annoying sound when power is connected on a Xperia Z3 Compact? [migrated]

Is it possible to turn off that annoying sound when power is connected? I have got the answer from Sony Support that this is a "feature".
0
votes
3answers
154 views

Make Windows 7 hibernate when unplugging charger

I have a laptop where the battery has reached a state of being pretty much useless. Neither Windows 7 nor Ubuntu 14.04 is able to correctly estimate the actual power percentages or lifetime of the ...
0
votes
0answers
27 views

Computer power supply fault

This is my first post to the site; it's been a great resource to me in both my professional and personal lives. It's about time I registered! So I went to boot up my desktop this morning and nothing ...
0
votes
1answer
26 views

Overloaded UPS, might it have damaged connected hardware?

I have an APC Back-UPS ES 400, and during a brief power failure (less than a minute), its buzzer sounded continuously. Looking up the manual, this apparently indicates an overload. It's rated to 240W, ...
1
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0answers
18 views

PC Won't Sustain Power

I've been using this system almost every day for the past 7 months. It has worked completely fine with no indication of error at all, but now it will not power on. Whether I use the casr button, the ...
0
votes
2answers
57 views

PC reboot at boot time [closed]

My PC keep rebooting every time I try to boot on my HDD. No BSOD, nothing. It just shut then reboot. I can go into bios and change setting, restore default setting or whatever. Nothing work. I have ...
2
votes
1answer
46 views

Computer won't start/react while new gpu is plugged in

I just upgraded my computer and changed almost everything except for the case and psu (650W). My parts: ASUS ROG MAXIMUS VII HERO Intel Core i7-4790K Kingston SSDNow V300 240GB 2.5" OEM Corsair ...
8
votes
3answers
32k views

Delay the screen lock in Windows 8.1 until some time after the screen turns off

In Windows 8.0 there was an option in "Change PC settings" (the metro-style modern mode settings) to lock the screen after the screen has been off a certain amount of time. If you turn the screen on ...
1
vote
1answer
58 views

I'm in the US and computer only works when power supply is in 230V position. How do I diagnose this?

So, I replaced a computer PSU about six months ago. And, the computer power down intermittently. I've found: it's not over heating. Monitor shows it running cool. it's not graphics related. ...
2
votes
1answer
2k views

Win XP Screen saver / power management not working

I have a PC running Win XP, and even though I have the power management set to turn off the monitor after 10 minutes, and I have the windows screen saver set up, many times they never kick in. I come ...
2
votes
2answers
4k views

How can I set my Windows 7 desktop with a UPS to automatically turn on after a power outage is over?

I've got a Windows 7 desktop system with an APC UPS to provide backup power during power outages. I've got the UPS connected to the system with a USB cable so that the built-in Windows power utility ...
4
votes
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 ...
2
votes
2answers
3k 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 ...
2
votes
2answers
154 views

Whats the difference in power consumption between a ball mouse and an optical/laser mouse?

What I'm interested in finding out is, if a ball mouse uses less power than an optical/laser mouse and if so, is it significant enough to warrant carrying a ball mouse with my Ubuntu laptop to save ...
0
votes
3answers
3k 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 ...
5
votes
5answers
19k views

My computer doesn't start - it is stuck in a turn-on, turn-off loop

When pressing the power button, my computer starts making start-up noises, but after a few seconds it shuts down. Then, after 2-3 seconds, it automatically starts turning on again and a few seconds ...
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votes
0answers
25 views

Dell Computer Power Supply

i have a damaged DEll power supply with 8 pin i bought an otherone with 24 pin and want to creat the 8pin the problem just one cable 12 Volt Standby 1.67A ,on dell but NOT present on ATX there just ...
1
vote
1answer
3k views

Network card (link-status LED) still active after shutdown from Windows 7 (but not from XP)

When I shut down Windows 7, my NIC remains active and the link status LED on the router remains lit. When I shut down Windows XP, it does not. Further, rebooting XP causes the NIC to shutdown as well, ...
14
votes
6answers
3k 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 ...
4
votes
2answers
34 views

Does an INTERNAL USB hub affect performance?

I searched a little bit on the subject, but I couldn't find any clear answers, so I'm asking this question: Will the performance of a USB hub connected directly to the motherboard be shared between ...
1
vote
0answers
40 views

Power supply needed? can I use the same size because old one is near end of life or do I need a larger one [closed]

Symptoms, my computer when it gets going the power will just cut, the power indicator stays lit but everything else dies, all the fans, the screens go dead it does not respond on the network (ssh ...
2
votes
2answers
17k 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. ...
0
votes
0answers
15 views

How to reduce number of wakeups/seconds due to timers?

I'm trying to reduce power consumption on one of my server. The machine is idle a lot of the time. I have monitored the number of wakeups/seconds with powertop and I see something strange: Summary: ...
2
votes
2answers
40 views

Is it not unsafe for a laptop to hibernate/suspend while an SD card is mounted?

I have been witnessing for years my Dell laptop freezes as it resumes from hibernating while an SD card is inserted in the slot and mounted. It of course took me some time to figure that out, but I ...
0
votes
1answer
58 views

How to know how much electric power a laptop is consuming?

On a laptop charger adapter it is written '65 Watt'. When I am using that laptop plugged into an AC socket, does it mean that it consumes 65 watt per second? I think it actually depends on usage. ...
1
vote
1answer
3k 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 ...
1
vote
2answers
81 views

How many HDD's off 1 Molex? PICOPSU

First question here. I saw some posts about powering 2 HDD's from one molex, but I want to power 3-4 drives. I want to use a single molex and use splitters for the rest of the drives. Below is an ...
0
votes
1answer
63 views

ALFA AWUS036NH TX power vs USB current usage

I have ALFA AWUS036NH network adapter on raspberry pi model 2B running the latest raspbian. ALFA AWUS036NH should be capable of delivering up to 2W of power according to specs. Following some ...
0
votes
0answers
54 views

Battery does not resume charging after power interruption, if brand new HP Envy notebook is powered off

I got this laptop just yesterday, and I have a weird problem. Configuration of laptop: CPU: Intel Core i7 5500U @ 2.4GHz (Turbo 3.0 GHz). CPU: Nvidia GeForce GTX 850M (4GB dedicated). RAM: 8GB ...
1
vote
1answer
18 views

wireless router power adapter replacement 0.5a vs 0.6a

i have a wireless router with no power adapter, it needs a 9 volts 0.6 amperes adapter but i only have 9 volts 0.5 amperes power adapter. Will 9 volts 0.5 amperes power adapter damage my wireless ...
-1
votes
1answer
46 views

should I remove an old laptop battery to save energy?

Does the old battery of an old laptop use a lot of energy when the laptop is connected to AC? Does the power supply waste electricity trying to continually charge an old battery? If I remove the ...
0
votes
0answers
24 views

ASUS monitor turns off, replacing the power cord works for a while then it happens again

My ASUS monitor is turning off a couple of times a day and is unable to be turned back on. I discovered that replacing the power cord allows it to turn on again, and in fact if I just plug in another ...
0
votes
0answers
12 views

Power plan switching brokes

I have ASUS U36S notebook and sometimes everything works fine. But sometimes power plan switching stop working. So for example CPU speed fixes on 34% of normal and I can't change it. This can be ...
1
vote
2answers
42 views

Acer Aspire V7 - Power Button and Lid Closed

I want to use my laptop with the lid closed with external screen, keyboard and mouse. I would like to turn on or take out of sleep/hibernation but the machine not allow this as long as the lid is ...
1
vote
2answers
50 views

How well is computer hardware protected from sudden power loss? [closed]

I always wondered how well the computer components can handle sudden power outages due to janitor accidentally pulling the power cord, whole city block power outage or power generator failure. Are ...
2
votes
1answer
43 views

How to put Windows Server into something like “Standby mode” so I can safely pull the plug off of it?

I have an interesting problem - we are going to test our UPS backup system by pulling the plug in our server room for a short time. Ideally the UPS will kick in and nothing interesting will happen, ...
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votes
3answers
49 views

Is it ok if I charge my IPad with the power adapter that I use for my Samsung Tablet?

My iPad version details are as follows: Model A1460 Complies with the Canadian ICES-003 Class B specifications FCC ID: BCGA1460 and IC: 579C-A1460 Serial: DMPKF3F4F18Y There is something wrong ...
0
votes
1answer
45 views

Windows Power Options - Turn off the display - HDMI not saving energy

I recently purchased a BenQ GL2760H Monitor which has both HDMI/VGA/DVI inputs. I have a Dell Desktop with Window 7 which has a built-in Intel graphics card with just HDMI and VGA outputs. I also ...
3
votes
2answers
70 views

PC only turns on when it wants to

I think my PC is possessed; it only turns on when it wants to. ...Jokes aside, my PC is not turning on and the symptoms are very strange and, to some extent, apparently random. I need help ...
0
votes
0answers
805 views

i can't turn on system power icon in win 8.1

The power icon in the system tray is missing. I have tried right clicking the taskbar then selecting properies and then 'turn system icons on or off' the power icon options are greyed out and set to ...
0
votes
1answer
60 views

How transmit power affects power consumption of Wi-Fi router?

I wonder how Transmit Power affects power consumption and heating of my home wireless router. Below you can see a screenshot from router control panel. I can easily set it to 50% and on Windows 8 ...
1
vote
2answers
875 views

Thinkpad T420s Flashes a Black Screen for 1s When AC Plugs In/Out

Just as the title says. A friend of mine is having this issue with his laptop. Is this normal? Can it be fixed such that there is no black screen flash?