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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64 views

Computer won't start unless power is removed for ~2 hours

About 6 months ago I built myself a desktop. A few weeks ago the computer started to act strange, for example it wouldn't always give a video signal when it came out of sleep. Now the issue has ...
2
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102 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 ...
2
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0answers
55 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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1k 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 customs I am experiencing regular BSOD crashes ...
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0answers
308 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 ...
2
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0answers
633 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 ...
2
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529 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 ...
2
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0answers
1k 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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30 views

Graphics card fans very loud, no video/unable to boot

So let's back up a few months. I came back from work one day to find my computer on (I remote desktop to it occasionally) but my graphics card (Gigabyte GTX 770 OC-2GB version) fans running very ...
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38 views

Waking from sleep causes instant shutoff

I am going to be very detailed as this seems extremely confusing to me ... I just completed upgrading a few components in one of my builds (list of components at end of thread). Everything works ...
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53 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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49 views

Power LED keeps Blinking - Asus p52f Laptop

I am facing an issue since a long time. I own Asus p52f series laptop, it's 3 yrs old right now. 2 months back I had to change the laptop battery, since I couldn't find the original Asus laptop ...
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39 views

How to run an application in linux just before poweroff and after linux shutdowned itself

I have a embedded system that needs to be power off itself after shutdown. To power off, the Linux should send a command via an i2c to another device to power off the Linux board. So to shutdown and ...
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62 views

HP laptop doesn't power up

I am kindly asking for your help. I have an HP DV7T-6C00 laptop which doesn't power up at all. I have read various forum threads and they did not solve my problem that's why I'm opening a new one. It ...
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0answers
62 views

GPU drivers crashing VLC or games - CPU or PSU fault?

For a long time I've been experiencing the "Display driver nvlddmkm stopped responding and has successfully recovered." errors. I tried everything that is possible, to no avail. Today, I monitored ...
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57 views

Faulty PSU - What needs to be replaced?

I was using my computer a couple of days ago, and out of nowhere, it instantly turned off. The computer was emitting a burning smell and would not power back on. After some researching I found that ...
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0answers
50 views

Should you worry about high voltage and wattage on a non-overclocked computer?

I've been wondering if I should be worried at all about high wattage or voltage on a non-overclocked computer. I say non-overclocked because when I Google search this question or something similar it ...
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0answers
16 views

Cursor hangs for a second when turning off sound system from the powerstrip

I have a curios hardware issue that I'm worried about. I have my desktop plugged into a regular power strip without surge protection or on/off switches. In one of its plugs there's another power strip ...
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0answers
50 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
100 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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198 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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0answers
37 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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24 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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23 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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52 views

PSU making noises coinciding with bad gpu?

I recently experienced some strange behavior from my system and I wanted to get your opinions on what it could be. First off, dem specs: ASUS P5Q Pro Mobo PC Power and Cooling S75QB 750W Intel Core ...
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64 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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37 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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14 views

HP J8156A Vernier network adapter

I've got a network card, that may or may not be working that I am trying to use in my home server. Got it from ebay as "used".The card does not let the computer boot, the computer turns on, but ...
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0answers
258 views

Can I Power the front-panel USB 2.0 ports with the power supply's 5V rail?

I have a high power (700ma+) USB device I wish to use on a single front-panel USB port. The USB specification in Wikipedia states: The USB 1.x and 2.0 specifications provide a 5 V supply on a single ...
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0answers
31 views

PSU replacement made the whole PC fail

What happened is a long story, but I'll try to be as short as possible. My PC failed without warning yesterday, I suspected my PSU (an Antec HCG 520w), so I bought a new one (Corsair RM 650w) and I ...
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0answers
838 views

Dell Inspiron laptop not starting

I have a Dell Inspiron N5010 dual booting Windows 7 and Ubuntu. It was running fine earlier, but suddenly it started mistyping letters with multiple letters and special characters for one second and ...
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222 views

Why is my PC hanging when I insert a DVD?

I have a computer with a 500GB hard drive, an 80GB hard drive, and a CD/DVD drive running on a 450W Power Supply. When I connect the power supply to all the devices at the same time and insert a ...
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93 views

Sudden and spontaneous shutdown when using ACPI

On a Dell Optiplex 755, when I bring the system out from ACPI S3 (suspend) to S0 (normal running mode), the system stays on for perhaps 10 seconds, maybe more. Then it very suddenly shuts the power ...
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82 views

Trying to run computer off DC but monitor is always blank

I am trying to get a computer to run off a DC battery. The computer seems to start fine (the CPU fan spins and the hard drive whirs), but nothing displays on the monitor. It just stays blank, as if ...
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0answers
152 views

Intermittent hard freeze/crashes, generally while idle. No event viewer details

Subject says most of it. My HTPC will occasionally be found in this hard-locked/crashed state when nothing of note was being done. The past couple times, it has been while the screensaver was running ...
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0answers
326 views

USB ports causing Wireless and Mobile Phone tethering drop out

I have a problem with my USB ports and I can't seem to pinpoint the problem. I'm hoping that I can get some idea as to how to troubleshoot my problem. Problem description: I recently bought a USB ...
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0answers
782 views

Monitor in power saving mode while CPU is still running

I am have a problem with my LCD going into power saving mode. It all started about three days back by randomly going into power saving mode while PC is smoothly running. Then the frequency of going ...
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0answers
90 views

Should The Plug of UPS Always Plugged?

Which is better for lifespan: Switch off the UPS and plug off or Switch off the UPS and leave it plugged in. Consider this two statements and give seperate replies: Which is better for >1 Month ...
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0answers
412 views

Why does my computer shut down suddenly without any warning?

My computer is: Motherboard: MSI 970a-g45 CPU: AMD FX-8350 eight core processor 4.0 GHz Power Supply: TSCO 650 Watts I bought my CPU 2 days ago. My last CPU was an AMD Athlon 460 x3 3.4 GHz. After ...
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vote
0answers
507 views

Upgrading Graphics Card on ASUS CM6870-US015S

I want to upgrade my Graphics card(NVIDIA GT 620) on my computer(ASUS CM6870-US015S) and I have a couple of questions. I noticed that the PSU on my Graphics card is only 350W so I'm assuming that I ...
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0answers
971 views

CPU fan runs only after removing “12 V power supply connection from motherboard” or HDD power supply"

My PC config (4 years old): Motherboard: ASUS M2N 68 - AM Plus CPU: AMD PHENOM X2 545. HDD: WD 320 GB RAM: 2 GB DDR2 800Hz Power supply: Intext 450W switching PSU About a month ago my PSU was gone ...
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0answers
544 views

My desktop won't boot or turn off, and there's no output - is it an issue with the motherboard or the PSU?

I have a desktop that won't boot, and the monitor doesn't turn on. The weird thing is as soon as you plug the computer, it turns on and then you can't turn it off. There's no light on the board to ...
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0answers
73 views

Monitor won't turn on

I have an Acer flatscreen that works properly (I've tested it), connected to a graphics card that also works properly (also has been tested), and still it does not respond when I turn the computer on ...
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0answers
106 views

When my computer powercycles after resuming from sleep

My issue it somewhat similar to this one - Computer continuously power-cycling in terms of symptoms, but different in general. If I put my computer to sleep manually, or shut it down, it will work ...
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0answers
107 views

Can't get the new computer past POST, continually rebooting

I’ve have been having power problems with a new computer that I recently put together. The system included: Thermaltake Level 10 GTS case Asus Sabertooth Z77 motherboard Asus Geforce GTX 660ti video ...
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302 views

CPU fan failing to start on boot sometimes

I have a fairly old desktop, which I like to use a fair bit over my newer PC's however sometimes on boot, the CPU fan fails to start. I had this problem previously, and I simply bought a new fan. I ...
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407 views

Computer only boots after connecting PSU PSON connection to motherboard PWRSW + ground

My server ( ASUS M3N78-EMH HDMI ) would not come back up after I put swapped some RAM. I got it back to work eventually but there is something strange: after a complete power off (pulling the ...
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109 views

Benchmark tool that brings GPU to maximum in order to diagnose defective PSU

I am currently trying to diagnose the following problem with my computer: Without warning or pattern the computer shuts down automatically, then restarts automatically and BIOS displays the following ...
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275 views

What can cause “Reboot and select proper boot device” other than hard drive issues?

I'm having some weird issues with my computer that I'd be hugely appreciative if someone can help me troubleshoot. Recently, my HTPC will start fine, then after 20-30 minutes it will freeze up and ...
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0answers
137 views

New power supply won't start

I replaced my power supply with a new one. I connected all cable to the motherboard 24-pin and Molex, HDD and DVD power cable, then I started my PC and I used it for about one hour. After I shut ...