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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Advent T1 (All in one PC) - screen going blank

I have an Advent T1 (all in one PC) that suffered from the under powered 12v 15amp PSU issue outlined here The computer would run for a short amount of time, and then power cycle. I've replaced the ...
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53 views

How can a power supply rated 7A be strong enough for two devices rated 5A?

I am not understanding something fundamental to amperage: Consider this adapter which outputs 12V 7A. It claims that several (eight, in this case) devices running at 12V 5A can draw enough power from ...
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1answer
38 views

-48VDC power required: How to make it work with 110VAC input

I recently bought a used NetOptics TP-GCU-48V network tap on eBay for use on my home net. This is one of their earlier models and has been discontinued for a number of years. They have two versions ...
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16 views

how do I know whether a fan error on post requires action?

I have an HP a6400f PC, (it's a tower) and after a brief power blackout, I started getting a generic "Fan error" problem upon startup. I can click through the error and boot into Ubuntu. ...
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2answers
30 views

Do power adaptors automatically adjust current and voltage?

I purchased a new power adaptor (19.5 V, 3.33 A, 65 W) for my Compaq Presario v3000 laptop, as replacement for the old one (18.5, 3.5 A, 65 W). It is listed as compatible with my laptop model. Does ...
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45 views

Diagnose Power Supply Failure?

I have a single 500W supply powering my home server. I think I have derived that a hardware failure is the problem. The following symptoms are prevalent across multiple installations of Win7. ...
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1answer
26 views

Computer force restarts when graphics card is installed

Specs: Intel Core i7 4770k with Corsair H100i Asrock Z87-ITX Corsair Vengeance 8GB x2 Rosewill HIVE 650W EVGA GeForce GTX 770 Runs to monitor through HDMI cable from GPU I've been troubleshooting a ...
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8 views

Debugging power on issue

First off I don't know if this is the correct fora, for this kind of question. My personal Acer Aspire 5745G has an issue, namely that it usually has issues powering on. The issue is that when the ...
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1answer
48 views

What adhesive should I use to secure power jack on an Acer/eMachines laptop?

I was going to use superglue, not sure how it'd handle the heat though and I'd be afraid of it getting in the jack. Two way tape seems to be a plausible solution (I've used it in automotive ...
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2answers
31 views

Computer wont boot. No picture on monitor, no usb power plus more

Tried to turn on his stationary computer after being turned off for one night. It is a few years old, components are somewhat strong (Was built to be a gaming pc). No picture on screen, tried two ...
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28 views

Power consumption of 1u and 4u servers

I have bought one IBM 1U server 3450 which has power supply 600W My Plan is to build virtual machines in there and use it for my testing Also i am getting very good deal for IBM 2850M2 with dual ...
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15 views

Replaced screen in Acer Aspire, now won't power on or acknowledge it's plugged in

I recently replaced the LCD screen from a different model Acer Aspire (Both 15.6" , same connector and LED backlight) in my laptop. I've replaced LCDs from other laptops before, so I'm fairly ...
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1answer
126 views

PC not turning off

I am trying to shut down my PC but it is not shutting down! I am using windows 7. When I say shut down (from start menu), windows is shutting down screen comes up. After several seconds display goes ...
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0answers
10 views

HP ProCurve: Iterface X is Link Down (errno 365)

In my Home Environment im Using a Windows Server 2012 R2 datacenter (received from dreamspark) to manage my "home-domain". My server has 4 physical network connections, used like this: Nic 1 and Nic ...
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1answer
23 views

my computer doesn't charge; the plug on my computer doesn't work

my computer NEVER works on just pure battery power. It always has to be plugged in. It always says "0% available. Not charging" but again, will work when its plugged in. Is this faulty ...
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30 views

My new motherboard doesn't start

I've purchased the following components for a new machine: Asus Z9PR-D12, Be Quiet! E9-580W 80+ Gold, Intel Xeon E5-2620 2.1 GHz, Crucial 16 GB DDR3 1333 MHz CL9 ECC Registered. I assembled the ...
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3answers
38 views

Blocking the high pitch sound from laptop power supplies

Many power supplis for electronics, especially laptops, emit a veey high pitched noise. While for the most part this soind is too quiet to bother anyone it can sometimes become obnoxious. The simple ...
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1answer
53 views

Nvidia GTX 780 cable installation

I have researched online but I am not confident in how I should connect of my GFX to PSU and MB. I have checked the manual which came with the PSU and the manual which came with the case, none of ...
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26 views

PC Speakers, misplaced power adapters

The goal: I need to be able to play sound on some computers, but the quality doesn't matter much. The situation: Somehow in our office move, the power adapters for two different sets of speakers got ...
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2answers
52 views

Possible short circuit after plugging a wrong cable?

So basically,I switched the power cable that goes in the monitor with the power cable that goes to my PC box since they look the same. My PC worked like that for 1 hour, untill I realized I messed up. ...
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1answer
22 views

New PC build, PSU Wattage confusion

I am building a new PC to use as a home media server. My computer parts have arrived (apart from the CPU) and I intend to build next week. I'm having some problems figuring out whether or not the ...
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2answers
45 views

Power supply or graphics card? [closed]

I have been having issues with my PC randomly shutting down and believe I have narrowed it down to two possible issues, either my PSU or my GPU. Back story: I got a newish computer (less than 1 year ...
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43 views

Keep getting electrified by computer power plug

I recently built a desktop computer, however whenever I move it to a different room for instance, and I accidentally touch the plug pins (UK), I get a quite significant electric shock. Is this a fault ...
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18 views

My PC crashes without any message

Is aerocool e80-500W compatible with Haswells? Motherboard: asrock z87 extreme6 CPU: i7-4770 RAM is compatible with this MOBO. I disabled C-states in UEFI howerver it crashes sometimes CPU is not ...
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1answer
14 views

External hardware to emulate BIOS power management (stay off, turn on, last state)

I have multiple scientific devices, each with an embedded computer and a no-frills BIOS. The single feature I really miss is the power management setting that specifies what to do after power loss: ...
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27 views

Reduce voltage on psu from 52v to 12v

I'm building a mining rig and is planning on using a ESP120 HP 3Kw 52v powersupply. I've seen someone get it down to 48v with this mod, but i wonder some one got it down to 12v? Or is it not possible? ...
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2answers
480 views

How important are the power recommendations for graphics cards

I recently upgraded to a new graphics card and due to some limitations, I had to install it in a questionable configuration. My old card had one 6-pin power connection, the new card has two 6-pin ...
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1answer
75 views

Can't screw PSU to computer case

As a software engineer willing to know more about hardware, I have started the dangerous quest of mounting my home computer myself. The part I've been struggling the most so far is screwing things ...
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1answer
43 views

Weird alarm sounding on my computer when under load, but no overheating

I am having a rather odd hardware issue and to be honest, I am not quite sure what is causing it. I have been building my own systems for over 10 years and have all kinds of qualifications, but this ...
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2answers
50 views

Power suppply sounds like a hard drive being defragmented

Came back from a holiday and noticed that my computer makes a new sound: the sound of a (quiet) hard drive being defragmented, i.e. reading/writing lots of data. Was worried it was one of my hard ...
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2answers
40 views

UPS will work on power but not battery

I have an old APC Back-UPS 200 I'm hoping to use for my PC. Connected to power it works fine. When unplugged it emits a "i'm on battery power" constantant tone. The 2 plugs on the back are not ...
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2answers
29 views

Are my devices severely underpowered?

I have a terrible setup. But first, let me say that I used a voltage meter to get a reading from my outlet, and it was starting at 119.5 volts right off the batt, with nothing plugged in. I am ...
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28 views

Powering a HP BL680c Blade Server Without a Rack

I picked up an old HP BL680c from a computer surplus store and have no rack with which to power it. The board seems to indicate that it merely requires 12V in. When I try to run it off of regular 12V ...
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2answers
39 views

Need assistance in connecting my PSU fan cable

I noticed that my PSU got really hot during gaming (to the point where it shut down my computer). I searched my PSU's model name (AXP-630P12P) and it said that the fan on the PSU was supposed to start ...
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2answers
41 views

Melting/smoking Universal AC adapter

So I own a Samsung RV520 for 2 years now and 3 months ago my AC adapter stopped working and had to replaced. I went to the closest computer service and they gave me an universal AC adapter. Now, the ...
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1answer
40 views

PSU coil whine, black screen & loud gpu fan (need help)

As of 1 week ago my computer started having some really weird coil whine coming from the PSU, and my monitor became black a few times and you could hear the GPU fans go 100%, so i instantly went and ...
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1answer
42 views

Battery recharge functionality broken due to short in AC adapter?

I have a problem recharging the battery of my netbook, an ASUS Eee PC 1025C. Since last week the LED of the AC adapter doesn't light up when it is connected to the wall. The netbook won't turn on ...
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1answer
33 views

Computer crashes when streaming Team Fortress 2

New computer. Played TF2 for 15 minutes, computer crashed and on boot it said something like PC shutdown because of power supply surge detected. I fixed the problem by playing TF2 at the worst ...
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36 views

Hard drives not always recognize

I'm having an issue. 80% of time when I power on my computer my hard drives aren't recognized (on BIOS). It's really random. I have a 4770k i7, an asus maximums IV hero, an SSD kingston 128g, a ...
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14 views

Darker patches on laptop monitor

I have a Lenovo G560 laptop, and the monitor is a LG Philips LP156WH4-TLA1. I have noticed some darker patches, like two of them, to the right of the screen that are slightly darker than their ...
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1answer
40 views

Laptop won't boot without power cable connected

My laptop is an Acer Aspire 5750 that used to run Windows 7 but is now dual-booted with Ubuntu 12.04 (now my predominant OS). Recently an annoying bug developed in that my laptop won't boot without ...
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1answer
51 views

Checking if NVIDIA graphic card crashes due to an underpowered PSU

I've started playing some newer games lately and encountered frequent, intermittent crashes printing errors such as DXGI_ERROR_DEVICE_HUNG, DXGI_ERROR_DEVICE_REMOVED, or similar. Researching reduced ...
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82 views

35% Maximum Frequency in the Windows Resource Monitor

I have a problem with my CPU as it runs over 100% on battery yet it doesn't go beyond 35% when plugged in. Yes, I've checked power management options like a million times for high performance and ...
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2answers
700 views

Can using the wrong power supply slow my computer down?

I have a Dell Studios XPS 1640, and it requires a 90W charger for use. I lost my power cable, so I'm now using a 65W charger. My computer has slowed down noticeably whenever it is charging. The ...
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2answers
85 views

Can a motherboard work when only supplied with ATX12V?

I am thinking of making a silent NAS for 3-4 people. Today I bought: 4TB Western Digital HDD 2x4GB DDR3 204 pin RAM Supermicro X10SBA motherboard which has 24 pin and 4 pin power connector. Does ...
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1answer
25 views

After building first computer, powering on works for only 2 seconds until it switches on and off infinitely

I have built my own pc, with z87x - UD4H / i5 4670k / 770 GTX. I installed the CPU / stock fan / connected it to the MOBO. Connected the 24 pin power supply Connected the GPU / Ram / Sonar DX audio ...
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20 views

No Video Until I Restart My Machine On First Boot, Then Black Screen Before Windows Loads Desktop

Here are my computer's specs. Windows 7 Intel i5 3570k EVGA 780 When starting my computer for the first time in the day, nothing will show up on the screen until I push the button again and turn it ...
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0answers
27 views

Does the laptop power supply the SATA drive from battery even being powered off?

I have a Fujitsu Lifebook s762 with a native SSD drive. After a couple of months or so - the SSD became the "brick". I read the article and remembered, that just before the failure, I shut down the ...
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20 views

Gtx 780 upgrade seasonic g series 450rm

as of right now I have a seasonic 450rm power supply with 37 amps on the 12v rail. Its powering a mini itx motherboard with an i7 4770k on it and 16gb of 1.5v memory. The i7 is over clocked to 4.3ghz. ...
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2answers
31 views

Losing monitor input - PSU or GPU suspect

I randomly lose video after playing games once in a while (mainly guildwars 2) regardless of graphics quality. Computer still produces sounds and appears working, but monitor reports no input. I ...