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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Compaq CQ61-319WM will not boot from just AC; dead battery has to charge

A friend gave me an old laptop to play around with, and it's exhibiting a peculiar symptom: it has to charge up the battery for a few minutes before it will turn on. The battery does not have much ...
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4 views

computer crashing - American Megatrends Power surge issue

Computer crashing with power surge report Summary : Dependant on GPU Crashes within 5 minutes of running, often quicker based on load Seems consistent regardless of operating system running GPU ...
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21 views

The Power Supply can influence in performance?

I bought a new computer, I have a core i5 4690, 16gb ram hyper-x, 120 gb SSD + 500Gb HDD and a Radeon R7 360 2gb, the only thing that is not new in my computer is the power supply, a 500W "Wise Case" ...
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22 views

Can a large power supply cause overheating?

I have a laptop which is just over one year old, and ever since I have had it, there have been some very serious overheating problems. The fan is almost always at full blast, which is incredibly loud, ...
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34 views

computer crashes due to supposed power surges

I built my computer half a year ago, I have never had a problem. I started playing shogun 2 through steam a few days ago, and last night when I went to play, it told me it was already running(though I ...
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19 views

PC won't start at all. 1 Beep at power on but nothing happens. [closed]

my PC won't start at all. The fans (CPU and Case) try to run, the mobo gives one short beep but then it turns off. It's a brand new PSU and brand new motherboard! I've recorded it since it's easier ...
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1answer
30 views

SMART says my hard drive is okay, but it's randomly respinning. What is happening?

I have a 320GB WD Caviar SATA hard drive on a 2007 desktop machine. Lately it has taken to randomly spinning down and up again during active usage (streaming a video off it, for example: the disk ...
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1answer
34 views

Power supply dead? [duplicate]

When I moved house I set up my computer and when I plugged the power cord in I noticed it was sitting a bit loose but I ignored it. Last night I was on my computer and when I stood up I kicked the ...
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1answer
19 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 ...
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5answers
185 views

Graphics card and PSU requirement

Note: This is intended to become a canonical post. I got a dedicated graphics card of type XXX and it claims I need at least a YYY Watt PSU. How big does my PSU really need to be?
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1answer
27 views

Radeon R7 250X OverClocked version; recommended power supply? [closed]

I have looked back and forward trying to find a PSU that fits that graphics card, because screen started flickering and system crashed if I used the graphics card mentioned above with a 500w PSU. I ...
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19 views

System suddenly going into continuous/infinite restart/reboot loop without even POST with clicking noise from PSU

I'm new here and desperately in need of help. My Dell Inspiron One 2330 was working perfectly till yesterday night. Today morning when I tried to turn it on, it went into a continuous restart loop ...
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1answer
13 views

What can I connect to PC PSU output?

I have a PSU similar to this one: (Source: http://www.asia.ru/en/ProductInfo/972066.html) I can see I can not only apply power to it, but also connect other devices. How much power can those draw? ...
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13 views

Monitor power status on laptop (Windows 10)

Sometimes I notice my laptop is losing battery power despite being hooked up to the power adapter. Also, sometimes while gaming the game becomes laggy for a short amount of time. I would like to ...
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0answers
12 views

Computer keep restarting over and over when display port plugin

My PC system just have booting problem recently when I upgrade new parts. My system: Intel Core i7-2600 3.4GHz Asus P8H67-M PRO Micro ATX LGA1155 Motherboard Kingston 16GB (2 x 8GB) Crucial M500 ...
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1answer
28 views

Power surge protection levels, spec of protective hardware

For some reason I experienced an extremely brief power cut (half a second or so) and it corrupted my desktop PC's BIOS (ROM?) which had to be restored and reconfigured. This is despite using a surge ...
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2answers
33 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 ...
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1answer
18 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 ...
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2answers
37 views

Modular PSU Connecting Cables

I bought strike-x 1100W PSU to use it with a quad socket opteron server. The problem is the server needs three 8 pin EPS connectors while the PSU comes with 2. Since its modular can i add another ...
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36 views

New Graphics Card Equals Dead Computer?

Here is my problem: I can turn on my computer and get all the fans to work, lights, etc, but my monitor(s) stay black with "no signal detected" error. How this happened: I bought a new GPU (MSI R9 ...
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1answer
27 views

Which Connecter Is The Correct One

I have a Compaq 5008MT desktop, with the standard hard drive & DVD Drive installed. I purchased a 1 TB Sata drive, and opened it up only to realize, I have a free SATA connecter on the ...
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1answer
27 views

Are laptop power adapters Interoperable?

Let's consider two AC power adapters from different brands (e.g. one from HP and another from Dell), with identical electrical specifications (voltage, power) and of course with similar plugs. Would ...
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1answer
18 views

restart looping - turn-on & turn-off every seconds

For 4 days my computer worked fine. Yesterday morning I've launched my pc. Everything was fine for one hour, I even didn't touch the computer, I was near by, looking video on my laptop PC. Then ...
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0answers
29 views

Motherboard detects Intel 750 PCIe SSD only when I replug the card. Cold boot issue

I have a combination of the following hardware: Corsair RM-550 PSU, MSI X99S SLI motherboard, MSI 2GB D5 X GTX960 graphics and a Intel 400GB 750 Series (PCIe card). I'm booting from another Samsung ...
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1answer
46 views

Computer turns on in repair shop but won't turn on at home

When I take it to a shop they are able to test it on the bench and even turned it on using my power cord and monitor. But when I take it home, the light and fan come on for a few seconds before ...
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7 views

Lenovo X201 Battery management INOP

Something is not working with the Lenovo Power Manager software/hardware on my X201T tablet. The computer always shuts down when I am on battery and still have 1.5-2 Hours left of battery life ...
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1answer
40 views

CPU Over voltage error after updating BIOS

I have a problem with my motherboard. I updated the BIOS on my Asus P8P67-M to the latest version(3703) after this when rebooting my computer I was shown a message telling me that there is a CPU Over ...
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0answers
14 views

HP Pavilion D7-1225ez battery not charging (tried a second battery too!)

My HP Pavilion D7-1225ez has not been charging its battery and making a lot of noise (as well as getting very hot). "HP Battery Status" returned as "INVALID: battery not inserted properly..." which of ...
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1answer
75 views

Computer won't boot, UEFI beeps

It has been a couple days by now and I am still trying to find out what the problem of my PC is. I have made a short video of what is happening when I run my PC on and in this video you might notice I ...
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1answer
21 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 ...
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2answers
93 views

Minimum PSU requirement for my build [closed]

I am trying to build a new system. Here is my summary Processor : i5-4690 Motherboard : ASRock H97M Pro4 RAM : G.SKILL Ripjaws Series 8GB (2 x 4GB) DDR3 1600 GPU : ASUS GeForce GTX 750 Ti OC-2GD5 ...
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17 views

Custom built computer won't turn on anymore?

I built this computer that has been acting quite strange for a while now. At first it would freeze up after 10-30 minutes of playing games (Both low end, and high end games). The only way to get it ...
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0answers
43 views

PC won't boot - Reasons unknown

So a few weeks back I bought a GTX 980 and in order to power it with longevity in mind, a Corsair AX860, an 860W Platinum PSU. It was working for two weeks and then I got "power surge warning/error" ...
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1answer
44 views

HP charger burnt?

Ok so I got a new HP laptop around a month ago and today I was watching Netflix and my battery was 10%. So I went downstairs and got my charger and when I plugged it in it wasn't working. I thought ...
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1answer
34 views

Connecting an ATX power supply to a Hard Drive Enclosure

I have a 4 bay hard drive enclosure made by Sans Digital (one of the TR4M series)... check that, I have 3 such enclosures and the power supply died on 2 of them. I called Sans Digital and asked about ...
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1answer
38 views

Is it possible to power laptop by DC through battery stage?

Problem: Power controller of my Asus laptop is burned out (it is a long story how it has been achieved), so now standard DC input doesn't power the laptop nor charge a battery. But the laptop still ...
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23 views

What does 50A on a +12V rail mean?

What I'm wanting to know is what does 50A on the +12V rail mean? Does it by chance have to do with the total output it can supply to the PC?
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30 views

Computer Doesn't Always Turn on when Pressing Power Button

I have a desktop and my case's power button stopped working after a while. I reverted to using a small screw driver or paper clip to turn my computer on by touching the contacts on the motherboard ...
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62 views

Fans works even after shutdown

I have kind of a big problem. After I shutdown the PC, some of my case fans (including the one with the LED and the LED) remains runnning and even my CPU fan. Sometimes it happens for all of them to ...
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1answer
49 views

Can I use desktop PC's power supply to power up SATA-to-USB cable?

My desktop PC's mainboard is dead. Since I already have 2 laptops at home, fixing the PC is not a priority. I need to connect the HDDs (3.5" SATA) from the old PC to the laptop time to time, to pull ...
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3answers
102 views

Asus Z170-A No POST

My recently build system mainly contains the following components: Mainboard: ASUS Z170-A Processor: Intel I5-6600 PSU: BeQuiet S6 550W (Until now I have been using the same PSU with a Gigabyte ...
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0answers
24 views

Two short beeps, 8 longer beeps - display works SOMETIMES

I recently cleaned the PCB and reseated the heat sink on my Radeon HD 7850 because it stopped working. I wanted to clean it because I haven't touched it for 3 years (the fan and heatsink were really ...
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0answers
27 views

Laptop stops and starts charging randomly

I have an ASUS laptop and it randomly starts and stops charging without moving the cables. The battery is brand new and seems to be working fine. The DC Adapter is professionally tested and seems to ...
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0answers
36 views

PSU blows fuse after fan replacement

I replaced a fan on a Nexus PSU by splicing the wires of the old fan. I've done this before and haven't faced any problems. However, this time there is something I don't understand going on. After ...
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0answers
8 views

Intermittent problems that only go away when the system is unplugged

I have an X99-PRO/USB 3.1 based system that experiences intermittent issues such as being unable to POST or the NIC not transmitting packets (but reporting that it is). The variety of problems seems ...
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2answers
35 views

Unstable voltage at server PSU when powered off

I own a used server which was sorted out because of memory instabilities, running it now as Minecraft server. It was actively used for a few years and then lay in the basement for a few more years. ...
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1answer
36 views

Asus X551M no power at all

My issue is the same as the one here: Asus x551M shut down and won't come on, but this has not been resolved. I have tried: Removing the li-ion battery, Removing the CMOS (which was ...
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3answers
35 views

Can computer power supplies use North American 240V (hot-hot-ground)?

Simple question: Most computer power supplies are auto-sensing between 110V/120V and 220V/240V. This begs the question, can they use 240V in North America i.e. connected to both hots (red and black)?
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3answers
50 views

Can modern power supplies use North American 240V (hot-hot-ground)?

Simple question: Most power supplies are auto-sensing between 110V/120V and 220V/240V. This begs the question, can they use 240V in North America i.e. connected to both hots (red and black)?
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0answers
53 views

Sometimes OS does not go to sleep

I have the last version of BunsenLabs 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt20-1+deb8u1 (2015-12-14) x86_64 GNU/Linux Motherboard: Asus Z97 PRO; CPU: i5-4590; SSD: Kingston SSDNow; Video: ...