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

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13
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6answers
2k 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 ...
0
votes
1answer
16 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
vote
1answer
2k 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 ...
-2
votes
0answers
17 views

Which components to get for x54c? [on hold]

I have accidentally damaged my motherboard and power switch board while cleaning the computer fan. I want to purchase a used motherboard and power switch board of ebay. My MB has this number ...
3
votes
1answer
25 views

Will a 800va UPS output 800va after 3 years of usage?

I have been using an apolo 800va UPS for three years for my desktop. During a power outage will the UPS supply 800va to my PC? When a UPS ages it will decrease the battery backup time but will the ...
7
votes
1answer
5k views

Windows XP/Vista/7 Check Battery Charge from CMD?

Does anyone know how to get the battery status in windows? On Linux it is as simple as acpi -b but in Windows this simple task seems impossible. powercfg -energy can get all kinds of all information, ...
0
votes
1answer
18 views

Finding Power Supply for laptop [duplicate]

I have a HP laptop that came with an 18.5V power supply. Is this power supply unique to the point I have to go back to HP to get one or can I get one from say Radio Shack?
2
votes
1answer
23 views

can i connect my usb powered speakers to my phone charger? [duplicate]

I have got a 2.0 USB powered speakers which are supposed to be connected to the PC USB port. But that port creates noise in the speakers and is not very convenient. I have a phone charger of output dc ...
10
votes
2answers
397 views

What happens when laptops reach 100% charge?

I have been reading alot of mixed views on how Lithium Ion batteries work when it comes to laptops. I have the new dell xps 15, with an intel i7 cpu, 16gb ram, and a 512gb ssd. Is it bad for the ...
0
votes
1answer
14 views

Automatic power on my server

I have a problem with electricity in my company (common cuts) how can I make my server (DELL POWEREDGE 2900) starts automatically when the electricity is restored and I'm not there
1
vote
3answers
268 views

External Harddrive Shutting Off and On Every So Often While Listening to Music

I am always listening to music on my PC (always via VLC Player) and every so often - maybe once every 2 songs, sometimes more frequently- the music stops playing (VLC's buffer/progress bar stops ...
0
votes
2answers
49 views

Computer not booting up after reconnecting to electricity

Recently I started having problems with a bit older PC (quadcore with 4gigs of ram). When I disconnect it from electricity for few minutes/hours for example when I want to clean it from dust or move ...
0
votes
1answer
34 views

PC powers down randomly

My PC powers down and freezes randomly when on windows 7. It works fine on linux. I tried to run memtest and it powered down during(at about 12 %, 0 errors reported till then). On linux mint it runs ...
0
votes
1answer
21 views

Laptop goes to sleep when lid is closed and disconnected from power

I am trying to work with my computer (Macbook Pro) attached to an external monitor, while the lid is closed. I can work on it when the laptop is connected to power, but when I disconnect it from the ...
-1
votes
1answer
26 views

Can i W PSU on 0660W UPSrun 60 [closed]

Is 600 watt Power supply takes more input voltage than 350 watt power supply?.
3
votes
0answers
24 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
8 views

Asus Vivo Mouse - Touch Pad Not Reacting After a Few Seconds

I'm having an Asus Vivo Mouse which combines a regular mouse with a touch pad. Anyway, everything works just fine. But when I position the mouse steady and only use the touchpad, it sometimes just ...
1
vote
0answers
12 views

HP Mini won't work with battery alone without an AC power

What to do with HP Mini netbook that doesn't work without AC adapter? Even if the battery is attached and with 80%-up power charged. I consider that maybe need replacement and I did with the working ...
0
votes
2answers
39 views

Is it fine to run a dc motor through USB cable connected to my laptop?

I have a dc motor which needs more than 10V to run efficiently, so instead of running it on electric cells, I usually run it using my laptop's power. I connect a USB cable to my laptop and the other ...
0
votes
1answer
52 views

PC doesn't turn on on first try on the power button

Every morning when I try to turn on my computer, it doesn't boot. It will only boot after several tries on pushing the power button. The PSU is alright as it powers the other fans immediately. When ...
0
votes
1answer
21 views

Can the USB ports on a Lenovo Yoga 3 laptop stay powered when Ubuntu 15.04 suspends?

I can't find a BIOS setting to keep the USB ports powered on suspend. Wondering if Ubuntu can keep them alive? I just want them powered so some devices (phone) attached to the ports can carry on ...
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
3answers
47 views

Immediate Restart After Power On - Before BIOS

When I originally built this PC, it had an issue with randomly restarting. I proceeded to try a bunch of things and ended up unplugging everything except the power switch and the cards I have in it. ...
22
votes
4answers
1k 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 ...
4
votes
2answers
3k 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 ...
0
votes
2answers
103 views

When laptop battery on “High Performance” it stops charging the battery

I'm using an ACER Aspire 5750G and my laptop specs are: Proccessor: Intel Core i7-2630QM Display: 15,6 LED LCD Nvidia GeForce GT 540M - 1GB - CUDA Memory: 8GB HDD: 750GB SSD: 250GB Acer Nptity ...
0
votes
1answer
18 views

Identify last linux shutdown time

We have a server running RHEL 5. Sometimes the power cuts and the server is down (the UPS handles only 30 min). I want to be able to to identify the time of the shutdown, in an other term the last ...
5
votes
3answers
8k views

Why does my laptop sometimes not turn on until I remove and replace the battery?

I have a Dell D600 laptop. It recently refused to start when I pressed its on button. The button blinked for a few seconds, as did the three symbols to its left, which look like padlocks containing a ...
2
votes
2answers
3k 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 ...
0
votes
0answers
23 views

Diagnosing hardware issue/Laptop won't boot

My (discontinued) HP Pavillion Notebook won't turn on. I encountered this issue RIGHT after the cord connecting my ac adapter to the wall outlet was unplugged (not the plug in the wall, but the ...
2
votes
2answers
2k 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 ...
-1
votes
2answers
161 views

DC-input motherboard How does HDD get power? — ASRock H81TM-ITX

This may be quite a simple question, but I do not know much of anything when it comes to building motherboards, voltages, wattages, and power. I am looking at this board - ASRock H81TM-ITX ...
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 ...
0
votes
0answers
21 views

Connecting an LCD display to msp430 launchpad?

So im trying to give my lcd display (Lumex 1602) 5v. Im trying to use the test pins on my msp430 launchpad TP1 and TP3. On the LCD pin 1 is gnd and pin 2 is power. for the launchpad TP1 is power and ...
1
vote
1answer
2k 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, ...
1
vote
2answers
1k views

Power supply bad with good voltage?

I am trying to drive out the reason I am having some hard drive "hard resetting link" error problems on a Linux Debian box. I am trying to eliminate the power supply as a problem in trouble shooting, ...
0
votes
0answers
16 views

PowerVault Model CSEH 001

What does it mean when the exclamation Mark is on and it displays the number 6? Any help? I tried to search on google for an answer but I cant find anything that actually helps me.
4
votes
3answers
71k views

Is the 4-pin PSU connector required? (Trying to connect a PSU to a mini case.)

I am trying to build a computer, placing an ASUS P8H67-I DELUXE in a custom retro C64 case. The case is an extra small form factor which can accomodate the Mini ITX board, but requires an external ...
4
votes
1answer
445 views

Weird things happen to my PC when light switch is turned off

I have been experiencing some strange behaviour on my computer. It happens at times when the kitchen light switch is turned off although my computer is in the study room. If I am surfing the web, the ...
0
votes
3answers
76 views

Will my hard drives be harmed if I hold down the power button for 5 seconds? [duplicate]

Sometimes I face the problems with my video card, so the system freezes. Reset button is broken, so the only way is to hold down power button for 5 secs. Guess that this action differs from power ...
2
votes
1answer
51 views

Coffee-damage via USB?

EDIT - Turns out coffee got into the case through the top fan... dripped down the back of the motherboard... Ho hum.... This morning my cat decided to chase absolutely nothing across my desk. This ...
0
votes
0answers
20 views

Allowing computer to turn off USB hub to save power - how much power?

Should the computer be allowed to turn off the usb hub? I have seen a solution suggested for slow USB recognition - to prevent the computer from turning off the usb hub. But there's a reason for it ...
0
votes
0answers
26 views

pavillion dv6 fall &liquid damage

I have a HP pavillion dv6 with win7 a Phenom II 940 and I think 5650 dedicated graphics adapter. It sustained a bad fall and the screen is broken, and also may have had some liquid spill on it as the ...
1
vote
2answers
56 views

Computer Randomly Powers Off. What's The Cause?

I upgraded my computer a month or two ago now and now every so often, my computer will randomly shutdown (and then restart after about 5 seconds). To clarify, it usually shuts down when coming out of ...
0
votes
1answer
20 views

StoreJet 25M3 USB 3.0 1TB beeping?

So my storejet started beeping just now, the beeps only occur when I supply power via the a USB port, and the beeping only lasts for about 5 seconds and after that the beeping is gone and it just sits ...
12
votes
2answers
102k views

What is the power output of a USB port?

As the title says, what's the power output of a USB port? Is it a standard value, or it may change depending on manufacturer/model, and so on? If that value is not standard, how can one determine ...
0
votes
1answer
49 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 ...
1
vote
1answer
22 views

Windows 8.1: Keep remote monitors/displays off during RDP

In the mornings, I leave my user account logged into my Windows 8.1 Pro desktop. My monitors power off a few minutes before I leave my home. Later, I RDP to that PC using the same username.. which ...
1
vote
0answers
31 views

Put computer to sleep, leave for 2+ hours, come back and its shutdown and won't turn on

I built my computer maybe 5 months ago, and it has been running fine up until a couple of weeks ago when I had it in suspend, and then it decided to shutdown and wouldn't turn back on. So I tried ...
1
vote
0answers
20 views

no power after resseting cmos?

My computer wouldn't let my usb keyboard work on boot and i could not access BIOS. So, i did what i usually do and remove the battery from the mobo and put it back again.At first, it would turn on but ...