A power supply is an electronic device that supplies electric power to another device, such as a computer, monitor or printer. This is achieved by converting wall power (or mains power) to a lower voltage, and in most cases also from AC to DC. Most power supplies also provide protection from ...

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Laptop does not turn on unless plugged in; battery works after powering on

I have a Dell Latitude D630 Laptop, which will only power up when the power adapter is plugged in. It will not power up on battery only. Once powered up I can unplug the adapter and it will run on the ...
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2answers
22 views

changing charger port on laptop

Is it hard to change the charging port on my Acer laptop or do I have to take it to the repair shop? Is there any way to charge it without fixing that port? I only need to charge it long enough to ...
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vote
1answer
29 views

IDE HDD + USB to IDE + PSU + AC cable = external HDD?

I have couple of 40 pin IDE HDDs which I want to use as external HDDs. Also I have old 300W PSU with AC cable and plan to buy cheap USB to IDE converter like that: I'm not sure if I haven't missed ...
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votes
1answer
43 views

Multiple cable adapter setup not working - VGA to smartphone. All cables tested and work

Issue Pictured overhead projector setup does not work. #1 -> #2 -> #3 -> Phone. All cables are tested and work! The issue is the HDMI connection between cable #2 and #3. With all other cables, the ...
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0answers
23 views

Force Windows 7 to think it is running on Adapter Power and not battery

Anyone know how to make a Windows 7 Laptop think it is running on AC Adapter power? This laptop (HP G62 series) has a usable battery which holds charge but it has a not-official power adapter which I ...
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1answer
16 views

What are the impact on underpowering my motherboard/graphic card?

I recently had to change my PSU and the one that was given to me has not enough power cables to fully plug every plug in the motherboard and the graphic card. It seems to work just fine though, and ...
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0answers
19 views

Computer can't boot

I have a 1 year old PC and the last weeks, when I press the ON button the PC doesn't power on ( Like I didn't press the ON button ). I have to plug and unplug a few times the power cord in order to ...
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0answers
14 views

How to measure power consumption in Windows 8

I want to measure real time overall power consumption of my laptop and I would do it with a software. After some searchs on the web I found out that Microsoft developed Joulemeter, a software able to ...
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1answer
25 views

computer randomly restarting. both in game and out of game

first my specs are. AMD Phenom II x4 955 processor 3.2ghz 20gb ddr3 ram 4Gb Nvidia Geforce GTX 770 850w Corsair tx850w psu Gigabyte ud3 mobo Windows 7 professional I recently uprgraded my vid card ...
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0answers
25 views

Computer wont turn on - flashing light indicator

I am having a strange problem with my computer, and need a diagnosis... The computer was just fine yesterday, but today when I try to turn it on, the light indicator flashes, the fans also get a short ...
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1answer
28 views

Machine turns off with different graphics card; who's the culprit?

A machine that I own does run quite stable in its current configuration. It has been running with a GeForce GTX 295 for a couple of years. That card used quite a lot of power, produced lots of heat ...
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1answer
25 views

HP Elitebook 8530p's CPU Increases to 100% when Plugged In

I apologize if this post is too long or doesn't describe the issue properly. I have absolutely no idea why it is doing this, apparently it is a problem with HP computers or a particular strand of them ...
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votes
1answer
105 views

What is the name of the cable inside PC cases?

Due to limited linguistic and technical knowledge, I do not know (and can not find) the name for the 4 pin (or perhaps 3?) plugs that are used inside PC cases to deliver electricity. My questions: ...
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1answer
31 views

my power supply is 400w, do I need a 400w UPS? [duplicate]

my power supply is 400w, do I need a 400w UPS? my cpu is pentium g620 2.60Ghz,2gb 1333mhz ddr3 ram,160hdd,nvidia gt210 1gb gpu,400w psu samsung 22" LED
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1answer
29 views

Moving to Sweden, bringing my PC with me. Shipping and Power query [closed]

In a few weeks I'll be migrating to Sweden, I won't be taking much with me, but I've got a custom built PC I've spent over £1000 on that obviously I won't want to leave behind. Two questions: What ...
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0answers
43 views

My computer restarts automatically when there is power outage and the monitor is turned on, using UPS power

I have a Zebronics Power UPS which backs up the system power at the time of power outage. I have no issues with that. But yesterday night I kept a movie to download and slept turning off just my ...
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0answers
77 views

Computer crashes on startup of 3D games

My computer renders games similar to Minecraft just fine, but games with more intensive graphics like: Planetside 2 Tom Clancy's Ghost Recon Phantoms Skyrim it crashes the instant it needs to ...
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1answer
22 views

How to determine if I am having power supply failure

I have this server Dell Precision 690. It has powered and turned itself off a few times. In some cases it seems to also be in a sleep mode where you have to turn it off and turn is back on. Is this a ...
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0answers
35 views

cpu's fan increases without reaching a settle point

I'm encouterning the followning phenomenon on the hardware side of a pc: When powering up the machine, the cpu's fan (cpu cooler's fan accuratelly) is starting to rotate, but it doesn't settle down to ...
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1answer
37 views

Hooking Microsoft Surface Pro 3 up to USB monitor

I have a Surface Pro 3 and I tried hooking up my Toshiba 14" USB monitor (PA3923U-2LC3) to it with the supplied USB cord. The Surface reported that the monitor was attempting to draw too much power. ...
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2answers
23 views

Computer dims immediately when remove power cord

I have an Asus Windows 8 computer. Very strange, whenever I remove the power cord, the screen dims immediately. And very dim. The battery lasts for five hours -- but not much use if the screen is so ...
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1answer
25 views

Does a modular power supply come with all the cables?

I'm looking to buy a modular psu, because a non modular one is a complete pain. I'm wondering if all the cables will come with the psu. This is the one I'm looking to buy. ...
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2answers
43 views

What kind of power supply will I need for 780 sli?

I have a GTX 780 and I would love to get another one and use it for sli, I was wondering what's a good powersupply wattage that I should get. I'm currently using a Corsair CX 600 Watt Power supply, ...
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0answers
23 views

How to make that computer turn on by external power on?

I have remotely controlled power supply, and I wish to implement cold reboot with it, for cases of unrecoverable hangs. Unfortunately, once power is off, computer is not turning on when power appears ...
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3answers
124 views

Why is my Windows machine restarting with Kernel-Power issues?

I'm experiencing lots of computer restarts (occasionally at very bad times, e.g. during a support call with a client). Digging into the Event logs gives me lots of Critical Kernel-Power errors: ...
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2answers
28 views

Radeon Graphics loud fan, unable to boot

I have an ASUS P6TD Deluxe with a Core i7 CPU (950 @ 3.07 GHZ), 6 GB Ram. I am running a PSU ANTEC 550 Watts. On it, I am running a quite new Radeon R9 290X. The system is booting of a Kingston SSD, ...
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2answers
80 views

Spilled coffee on laptop

Here is the story: When I woke up, I started my PC and went in the bathroom... when i came back i noticed that my keyboard is spilled with coffee and my laptop is turned off, I quickly wiped the ...
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votes
1answer
42 views

why wont my custom built PC boot? [closed]

I turn it on and the lights turn on the fans are spinning but no picture turns up, and when it's on it'll sound like its powering down and then it'll fasten up again and it'll keep doing this. My ...
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1answer
14 views

Overseas parts power compatability

I'm ordering parts for a new computer and they're way cheaper on Amazon, but I'm in New Zealand which runs 240V as opposed to America's 110V (I think). Will the parts be fine if I just get the power ...
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votes
4answers
50 views

power button.Wont turn pc on or off

I have a custom made desktop which is 5 1/2 years old. The computer was working perfectly until I moved. After I set up the PC again, I couldn't consistently turn it on and off. When I did get it on, ...
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0answers
33 views

Make certain programs run when connected to power supply (laptop)

I'm running Windows 7 64-bit on a Lenovo Laptop (X220i Tablet) I was wondering if it was possible (and if so, how) to have a list of certain programs that will run automatically if you are connected ...
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1answer
30 views

Laptop power supply unit compared to PC power supply unit

PC power supplies are relatively huge compared to those used with laptops. But why is this so when a laptop today can have an equal level of performance as a high end PC? Are they both switching ...
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3answers
62 views

Converting a computer PSU to a bench power supply

)I have read a number of articles dealing with the conversion process and think I can manage to get there if I am careful and take it step by step. However my starting point is a box of PSUs that I ...
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0answers
123 views

PicoPSU problems with BioStar A68N-5000

I build myself a low power NAS system and I'm trying to power it with a PicoPSU and an external brick power supply. When I turn on the power the case fan starts turning for a second and then stops ...
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0answers
14 views

What depth of discharge does 0% in a UPS correspond to?

When a UPS like an APC Smart-UPS shows 0% charge remaining, does it mean the deep-cycle batteries are completely discharged or that they're at 20%?
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2answers
39 views

Computer is Shutting off Randomly Throughout the Day - Need to Tilt Case to Restart

Throughout the day, my Windows 7 desktop system is shutting down without warning every 2-6 hours or so. The frequency seems to be getting greater, but I'm not yet completely sure of that fact. This is ...
1
vote
1answer
43 views

Something fried in PSU, but PC still works?

I just finished cleaning the dust from my desktop PC with compressed air. When I put everything back together and plugged it to power, there was a brief flash of light and another after I booted it. ...
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votes
4answers
134 views

Is it safe to power access point from cigarette lighter?

Access Point requires AC power adapter with 12V and 1A output. Can I use cigarette lighter adapter (usually intended to be used to charge laptops in a car) for this device? Cigarette lighter adapter ...
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votes
1answer
56 views

Connect Radeon R9 290X DirectCU 2 to Corsair HX850

I have received a new graphics card after my old one died after a couple of weeks The card is a Radeon R9 290X DirectCU 2 and i wish to install it I got a single wire with it; one side has 8 pins and ...
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0answers
15 views

Can I diagnostic/check my PSU?

I'm soon about to upgrade certain parts of my computer, CPU, Motherboard, Memory.. those parts are from 2009, and have served me well through countless hours of programming and gaming. my PSU is from ...
1
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2answers
43 views

PSU Noise when turned off

When my PC is turned off and I bring my head very close to the PSU, I hear a high frequency noise. Is that normal? I can't hear when I am like 2 metres away from it. And it's only there when turned ...
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0answers
29 views

Would intermittent contact with the service voltage and capacitors in a power supply (inrush current) damage a computer?

If I plugged my laptop AC Adapter power cable into a UPS, causing sparks to blast out (and being unable to insert it due to the UPS being seemingly not designed for this type of plug, for whatever ...
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66 views

Agghhh! UPS Back-Up, Laptop Charger, Sparks

Boy… ok. This is so frustrating! Ok so, I've been getting a whole lot of problems with the electrical grid here lately: spikes, surges, lows, brown-outs, all kinds of problems, it's terrible, ...
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0answers
25 views

Computer starts and shuts down. After pushing the power on, it functions normally

Enviroment: * I have a working room with a common power switch for all the room. Every time I leave the room I switch the power off. * In this room I have a Fujitsu Siemens computer running Windows ...
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0answers
23 views

Failing CPU, PSU or Motherboard?

So i have a HP desktop and when I press the power button all sounds well (fans, hard drive) but then it turns right back off within 7 seconds. There are No beep Codes, or noises. So I am trying to ...
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1answer
58 views

Constant beeping with new PSU, no video output

So, my friends computer is not producing video output. The monitor works, I've tried the CPU and RAM inside of my computer, so I know they work. On the initial build we forgot standoffs and the ...
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0answers
38 views

ASUS X501a does not start up(fan spins, HDD does not spin, black screen)

Repairing my friend's ASUS X501a laptop. After power up, it goes into a black screen. The fan spins a few seconds after powering up , but HDD refuses to spin. I have tried the following: Plugged a ...
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0answers
21 views

Two PC's, shared power grid, can this be reasonably done?

I've got quite a data headache. Motherboard A has partially failed. I replaced it with board B. Oops, board B won't play nice with the RAID card. Oops again, part of the backup of that RAID array ...
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2answers
44 views

Does this psu have enough power for this graphics card?

PSU: http://www.newegg.com/Product/Product.aspx?Item=N82E16817139049 GPU: http://www.newegg.com/Product/Product.aspx?Item=N82E16814125491 While looking over for the specs for the PSU, I noticed it ...
0
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1answer
20 views

Disconnection laptop/notebook power supply

I need to alter some settings in my BIOS and the process requires me to switch off my computer and disconnect my power source. ...