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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99 views

Need to reconnect power supply to boot windows 8.1/10

Please let me know if it is offtopic here. I am facing some hardware problem may be that's why I am posting it hereI have a desktop pc with dual boot(ubuntu14.04 and windows 10).Motherboard: intel ...
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87 views

How can I debug a non-working motherboard?

I have a (3 year old) Gigabyte GA-Z77X-D3H that doesn't turn on anymore when pressing the power button.The button is plugged properly and shorts the pins when pressed.I changed the power supply ...
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216 views

GPU Fan really loud, all the time

I have a GTX 560 TI that appears to be stuck at a 100% fan speed all the time. The fan is running extremely fast.It runs around 25 degrees Celsius, which I would expect for a fan going that fast...
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231 views

What is this power connector? What power supply do I need for it? (S5520UR-E24717)

I was looking around ebay and found some old xeons, and thought I can build an home server with these, so I bought a couple and a dual lga1366 board and I was set. When it arived I inspect the board, ...
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66 views

Laptop adds harsh noise to sound playback while running on battery

I've looked at what others have said to those who asked with similar problems, and it seems to be a power supply issue. The louder the sound I'm trying to listen to is, or the higher the volume, the ...
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165 views

Laptop died after using a SATA/IDE USB hard drive converter

So I think I have done something very bad, I have a HP laptop and wanted to recover some data from some old SATA and IDE drives.I Bought this http://www.amazon.co.uk/gp/product/B00VR52ZZ0?psc=1&...
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1k views

Can I charge my 19.5 V laptop with a 19V power bank?

I have a laptop of which the regular power supply provides 19.5V at 3.34A.I am thinking about buying an external power bank that I can choose between 19 or 20 V.Would this be safe to use?Should I ...
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41 views

I assembled my computer and it won't boot even though the power seems to be flowing in

my name's Marc, I'm a computer enthusiast and I recently purchased components for a decent configuration willing to assemble it myself. So I did that, everything fit together and I was happy but when ...
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343 views

PSU type on HP z440

I have a HP Z440 to which I wish to acquire a new Power Supply Unit. According to the specs here and the tag on the actual PSU, the unit has the power supply listed here. I wish to change this PSU ...
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48 views

Dell Inspiron 6400 AC-Adaptor Less finicky BIOS version?

I am the recipient of a Dell Inspiron 6400 which I received with a dead battery although the ac adaptor would power the unit. I obtained a new battery for it and installed it thinking my problems ...
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561 views

My battery stops charging randomly and then loses power

I have a Lenovo E540 running Windows 10 x64. For quite a while now, I've been having problems with how the battery charges.When I plug it in, it will always start charging - maybe for only 30 ...
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80 views

No POST on new built desktop

I just finished building a desktop again and it will not perform a successful POST. No beeps or video either.Since my goal is a successful POST, i removed all irrelevant hardware already and am only ...
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0answers
81 views

When I turn on my PC,why it spins for a second then restart automatically? (when I unplug and plug in back the power cable)

I have recently built a custom PC, it works (I think) very well other than the issue below. Since I just built it, I was still playing around with that (changing fan positions, adding new fans, etc.. )...
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418 views

Won't boot after inserting new RAM sticks

I bought a new pair of 4gb RAM sticks today.Thinking it'd be easy to install, I powered down, slapped them in and powered on. It wouldn't boot. Fans spin up, a couple of seconds pass then it powers ...
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491 views

i7 4790K | Shutdown while running Prime95 and RealBench

The computer experiences a hard reset instantly with Prime95 "Small FFTs" torture test (also with the "Blend" test but after 30 minutes) and after 4-5 passess of RealBench benchmark without any kind ...
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0answers
1k views

Monitors keep blacking out with “hardware disconnected” sound

For a couple of years, I've had trouble with my homebuilt dual-monitor PC. It's set up to shut off the monitors when not used for several minutes. The problem is, when I wake it up, about 5% of the ...
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460 views

I keep getting the “USB inserted” sound whenever I plug or unplug something to a power socket. Should I worry?

I own a Lenovo G510. I use a cooler baseexternal mouse keyboard monitor2:1 speakersWhenever I plug something to a wall socket that is near to the one that I use to power everything (when ...
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108 views

Desktop PC has stopped powering up

I've gone through the two existing questions I found that seemed to the closes to my situation, tried most of the proposed fixes, and I'm still not getting any results. Those questions where:Desktop ...
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0answers
167 views

Third-party AC adapter for Acer Veriton L460 desktop causes fans to continuously run at full speed, even when system is powered off

I'm not sure this is the the right place to be asking but it seemed like the best option. I acquired an Acer Veriton L460 (Ultra SFF Desktop) which requires an AC converter of 19V 17.1A so I ...
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835 views

2nd monitor won't turn on after computer power off

I've got two identical screens both connected via DisplayPort to a GTX 970. Then one day only one of my monitors turned on after I turned on the PC.My main monitor turns on just fine - every time....
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6k views

Computer only turns on after many hours off/unplugged

I'm having a problem with my PC.My computer specs are:Mobo: Gigabyte GA H81M S2PVProc: Intel Pentium G3220Ram: 2x8GB 1333MHz Kingston (Passed on Mem86+)PSU: Corsair CX430 IIIHDD: Seagate ...
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53 views

Testing my PSU, and GPU

Bit of a complicated situation people..But my main question is my PC seems to be running on my psu but it has a problem with my graphics card.It needs two six pins to run it.. The card runs on my ...
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540 views

What about placing a voltage regulator behind an UPS with modified sine output, to protect an active pfc psu?

I moved to an area/building where there are quite some problems with the wall-power supply.Primaraly I would like to protect my computers, secondary I would like have some affordable UPS for some of ...
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110 views

What controls the RAM voltage value?

Quite simply, is the RAM module responsible for generating its own operating voltage or does it just run at whatever voltage the motherboard is providing?I am imagining that it could either ...
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113 views

Usb ports connecting and disconnecting

I know this is not the place to ask about hardware problems and solutions, but I can't search on google anymore... I've been for over 24hours searching on google about my problem and trying to get a ...
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0answers
3k 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 ...
2
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0answers
313 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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0answers
140 views

Computer won't power on

Was working fine for over a year, now won't boot. LEDs on the GFX card and one on the MOBO labeled PWR glow when plugged in, but nothing happens when I push power and shorting switch pins does nothing ...
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2k views

Random BSOD crashes when all RAM slots are occupied

Although I'm a long term user of other StackExchange sites this is my first question on SuperUser, so please let me know if I've neglected any community customsI am experiencing regular BSOD crashes ...
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0answers
1k views

Random gray screen while playing game

I have a strange issue with my PC. When I play 3D games, sometime (not always) the screen just turn gray with vertical line while the computer seems to be still working. I though at first that the ...
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0answers
2k views

Computer randomly turning off after BIOS update?

I recently built a new PC, which has been running fine up until a BIOS update yesterday.I normally wouldn't update BIOS unless there were issues and in this particular case, the AMD FX-6100 CPU I'd ...
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961 views

HD5450 black screen after installing drivers

I just build a new HTPC-ish desktop computer and everything works fine until I install the ATI drivers for the videocard which is a Asus HD 5450 Silent 512MB DDR3 card.The main issue is that I get a ...
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4k views

Normal PSU voltages?

So i've been having some freezes here and there. After checking out my temps (normal), my memory (ran memtest x86 for 3 hours with no problems) and a cpu stress test (also, no problems), I decided to ...
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54 views

Power consumption in Windows 10 and Linux

How does Windows 10 compute the percentages of power used by various applications and hardware devices without any external power measurement device? It's a fascinating problem to be able to ...
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31 views

Desktop PC doesn't switch on, power cuts

Today I have quite a big problem with my HP Pavillon Desktop pre-built computer.So, what happens?Well, when I press the power button, nothing happens. There's a led light on the back of the ...
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31 views

Computer wont turn on after turning off

I have a very specific issue.~2 months after getting my new computer, I could not turn it on anymore.So I disassembled it, did a few tests, tried to fix and found out following:Computer runs fine, ...
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95 views

Kernel-Power error (41) without anything wrong

I'm using Windows 8.1 and after reboot/power on, I see Kernel-Power error (Event ID 41) on Event Viewer. It doesn't cause anything to happen for more than 2 years, no sudden reboots etc. but I wonder ...
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23 views

Effect of power outage on power supply connected to surge arrester and voltage regulator

I have a computer that connected to an automatic voltage regulator and an a surge arrester. The power supply unit is set to automatic power recovery so that when there's an outage, it will start the ...
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34 views

HDD fried, advice on board repair

I swapped out my corsair 850 for a EVGA 1000w P2 PSU yesterday but left the original sata power cable on all my HDDs(I know i'm stupid), I plugged it in and puff went all my storage HDDs. According to ...
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0answers
31 views

How to make my ubuntu laptop not to use the built-in battery?

I have a Lenovo y50 which I use all day and night. It is plugged in most of the time. I was wondering if it is possible to make my laptop not to use the battery sometimes and get it out of the ...
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0answers
2k views

Is it safe to increase “Power Limit” in MSI Afterburner during crypto-mining and what does it actually do?

I recently started mining ZCash as a hobby on a system I had already built. It consists of an i7-8700K clocked at 4.89GHz, and an MSI GTX 1080Ti Gaming X 11G. I chose to mine on CPU as well as GPU, ...
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44 views

Windows 7 on SSD - power supply

Im trying to do a clean install of windows 7 on an old desktop. What Im noticing is that sometimes the SSD is recognized by the BIOS (ie. shows proper make and model etc) and sometimes isnt just ...
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0answers
84 views

External PSU (monitor) coil whine only when dark color are on screen

I have a Philips Brilliance 258B6QUEB monitor which has an external PSU that whines quite notably, but only when the content on the screen is dark-ish. Take for example these three color gradients: ...
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0answers
51 views

New Asus monitor goes blank at least once a month and needs restarting to work again

I have an Asus ProArt PA238Q monitor that sometimes goes blank for no reason whatsoever.This issue usually happens one time in 1 week or 1 month.When this happens, its power-LED stays on.It is ...
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0answers
61 views

Why did my bios change on its own?

I've spent most of today trying to find out why my computer wouldn't pass the bios splash screen. It took a few hours to get the computer running again. I tried all manner of hardware and software ...
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0answers
27 views

Accidentally damaged the power button's Circuit Board Cable now Laptop turns off randomly

I was cleaning my laptop inspiron 15R(N5520) and i accidently damaged the connecter ribbon pins of the power button under the keyboard.Now my laptop turns off randomly and i have to tinker with the ...
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0answers
75 views

GPU no signal output, installing driver (on integrated card) causes system freeze

I recently decided to build a budget PC, I bought the following parts:MOBO: Gigabyte Z170-HD3P CPU: Intel I3-6100GPU: Asus R9 280xPSU: Cougar RS750 v3, 750WRAM: HyperX 4gb DDR4I've plugged the ...
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0answers
45 views

Is it normal to get power supply surge when lightning cuts the electricity?

So I'm a bit worried because my previous MoBo (a Gigabyte) died and I just bought a new MoBo. This new MoBo is an Asus. Last monday (now we are friday) I've let my computer opened to be able to use it ...
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0answers
87 views

How do I connect a video card which requires 6 pin PCIE, using a 8pin PCIE port on my PSU?

I bought a second hand pc recently with fairly decent specs, except for the video card, I have a bunch of spare SATA cables dangling(well,tucked away) in my PC but no Molex or PCIE 6 pin plugs.My ...
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145 views

PC won't start, PSU buzzing/humming

I have an MSI K7N2 motherboard with an Athlon 3200+ XP. I have been running it in an old Cooler Master case and it has been OK for at least 10 years. About a year ago, it broke down, with something ...

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