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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Troubleshooting desktop PC not booting if network and USB ports are connected

My current desktop machine is composed by: Intel q6600 Gigabyte EP43-DSL3 4GB DDR3 2HD S-ATA 750MB Seagate DVD-RW S-ATA Keyboard, webcam, headphones and the usual stuff connected to the USB ports. ...
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31 views

Laptop battery - 100% available plugged in charging

I have a Dell Inspiron 5521 running Windows 8.1.Recently, I had replaced my battery.But my battery indicator shows 100% available ( plugged in,charging) status. I calibrated the battery but no ...
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41 views

Why does my CPU not use it's full TDP wattage potential?

I have an Intel Core i7 3610QM (Ivy Bridge) in my laptop. According to Core Temp, the TDP (thermal design power) is 45 watts. However, when turbo boosting to the max (3.1 GHZ) on all 8 threads with ...
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31 views

Computer freezes and stutters when playing games

My computer whenever playing games begin to freeze and then begins to stutter. The sounds comes out of the headset, not the case. I thought it might be the PSU, so i changed the PSU. Thought it might ...
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34 views

Fried my motherboard/PSU?

I was experimenting with making a custom switch to start my computer, and I was using an LED toggle switch (I know now it's supposed to be a momentary) that needed 12v power for the light. ...
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931 views

Can I charge my laptop using a power bank using my laptop charger?

I have a Dell XPS-1530 laptop with a 9 cell battery. It's working fine but I was just wondering whether I could use a power connector or something to plug my laptop charger's 3 pin plug into another ...
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44 views

Laptop Turning On and Off

Just for a heads up, I am not computer hardware savvy, but I do have a basic understanding of parts and what they do. I have not replaced any parts other than the hard drive but that was before the ...
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123 views

New graphics card - System shuts down when gaming

I bought a new Graphic card yesterday, a Geforce GTX 970, and I swapped it with my old one. and I realize now that maybe I should have done some more research about it beforehand, as it seems there is ...
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67 views

selfbuilt pc shuts down and restarts. 1 long and 2 short beeps

I have built a new pc and I almost finished. When I turn the computer on I starts up but then shuts down again. The beeps I'm getting is 1 long and 2 short which I think is the video card or ...
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173 views

POST failure - Motherboard, PSU, GPU or other?

Last night, I was playing Far Cry 4 and had been at it a good hour or two when the sound suddenly broke up and stopped; next the PC switched itself off. It tried to reboot, but keep failing in a ...
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86 views

What size is the barrel connector required for a Sprint Airave 2.5 signal booster?

Can someone please tell me what size barrel connector tip is needed for ac adapter for Sprint Airave 2.5 signal booster?
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171 views

Case/PSU grounding, static causing reboot

I built a machine for work recently that is displaying two distinct characteristics. One: Yesterday, I was able to shuffle feet on our carpet, touch the front of the case, arc static, and the machine ...
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265 views

WD external hard drive turns off

I've got an external hard drive (WD500BMVU) that was dropped and now does not mount anymore if I connect it to my Laptop (Mac). When I connect it with the USB cable, the LED light goes on, I hear the ...
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99 views

Computer Hard Reset Issue

Wanted to get some feedback and ideas on a issue I'm having. Certain video games cause my computer to hard power reset (as in it powers off with no warning then turns back on). I've identified ...
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170 views

PSU has 2 PCI-e cables, and I don't know how to use their endings or if I need to use ONLY one cable

I've started to assemble my new PC and when I've finally attached my Gygabyte NVIDIA GPU (GTX 760), it needs some kind of PSU power, in the form of 6 + 8 holed socket. So far so good. My PSU (Cooler ...
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61 views

PSU starts and stops immediately. Need Help.. IS it faulty?

Yesterday when I switched on the PC it started and stopped immediately. I tried everything that I could. For PSU I jump started it by paper clip test. When I switched on the PSU, the fan started ...
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217 views

Battery 100% still charging

I have a Acer AspireV3-772G running Windowws 8.1. My battery indicator shows 100% available ( plugged in,charging) status. I calibrated the battery but no difference. Also I have bought a new battery, ...
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287 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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103 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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1k views

Toshiba Satellite C850 boot loop

I've got a Toshiba laptop acting strange on me. Any thoughts appreciated. C850-11C PSCC2E AMD E1-1200 APU Windows 8 UEFI Problem: Laptop cant restart. If i shut down the OS or restart, or it ...
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70 views

Upgraded Computer, Now It Turns Off Randomly/Won't Turn On

I have recently upgraded my computer and now it turns off at random times. Sometimes, I'll be on all day and there will be no problem. Sometimes it'll be a couple hours and it'll shut off. And ...
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438 views

Connect ASUS R9 280X to Corsair HX850

Need to connect an ASUS r9 280x graphics card to Corsair HX850 PSU. There are 6 pin and 8 pin power connectors on the graphics card and 8 pin PCIE power connectors on the PSU. Cables available for ...
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120 views

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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172 views

My PSU makes a VERY LOUD NOISE when watching video in Firefox browser

After Firefox update now every time I watch video I have very loud noise from PSU. It is so loud that the first time I heard it I got scared. My friend told me not use a "stable" but get an Alpha. ...
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26 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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568 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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130 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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107 views

Connect a Codegen 200XA power supply to an Asrock H61M motherboard

I am trying to use some computer parts I found at home to build a computer for my parents. Currently I have a Codegen 200XA power supply, but it doesn't seem to have an ATX12V1 conector which I need ...
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24 views

POST Beeps - was my mobo playing taps? Now it won't power on

I have an Asus P5Q Pro Turbo mobo. I use it for a file server for home. It's in a case with a total of 8 SATA drives, mostly the green eco type, of various brands. Four are connected on the mobo, ...
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84 views

9 Bleeps Installing new GPU - Black Screen

BIOSTAR TH55B HD Intel i5 760 2 x 4gb ddr 3 ram 600W PSU 1TB Samsung HD105SI ATApi iHAS124 CD/DVD Windows XP I am trying to install my new msi radeon r6950 twin frozr iii However when I install it ...
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833 views

Tracking down the cause of a blue screen error (code 124)

I've been having problems with a blue-screening PC lately (BCCode 124), and I've been trying to track down whats causing it. I had the idea to run a bunch of stability tests to try and isolate the ...
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95 views

PC will not power on with normal power supply

My ASUS M2N-SLI motherboard would not turn back on after running fine for 5 years. Connected a new (still in the box) 430W power supply - ATX 2.1 - the system powers on. The power supply doesn't have ...
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1k views

eeepc 701SD 4G Power Up Fails - Will not power up / boot

I have a critical failure with my eeepc 701SD 4G: Will not power on at all. - Power button pressed = nothing happens at all. absolutely nothing. - Battery light shows orange and doesn't charge - ...
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3k views

CPU fan turns on for a second and stops, PC does not start at all

I have checked my PSU and it works fine. When I turn on the MOBO, the CPU fan, case fans and the psu fan itself turn on for half a second and then turn off. The PC remains off. The Bios light turns ...
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3k views

EVGA Geforce GTX 760 ACX Installation issues

I recently purchased a new Geforce gtx 760 from EVGA with ACX cooling, and I'm quite confused with the power supply. The card came with 2 PCI connectors, however one was a 6-pin and the other was an ...
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414 views

Is my PSU dying?

I had a GTX 580 3GB, and about 4 weeks ago my PC frequently refused to POST, and sometimes when it was working, the screen would go black and the GPU fan increased to 100%. I would then have to reboot ...
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1k views

How can a power supply (PSU) fail to power a motherboard but still test as “OK”?

I'll start by apologizing for asking another question on a topic which obviously pops up over and over and over again. I tried to locate an existing answer matching my situation, but I did not. If you ...
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40 views

Dozens of spontaneous reboots

I am working on a SUSE Linux based system that runs 24/7 and has done so for around 3 years although I cannot say that it has not been rebooted in that time. At 9th June there apparently was some sort ...
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381 views

Do USB devices draw current from the computer if a powered hub's current “runs out”?

I have a few heavy duty devices and a powered hub and I wonder what's the flow of current in those things.
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2k views

Hard disk stop working after some time

OK, this is a problem I am experiencing from the last few days. My PC starts normally, but many times when I work, my HD stops working and the PC get hangs. If I wait for few minutes (5-10 min), then ...
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57 views

Wake up PC via USB from another PC

How can I wake up/turn on Linux powered PC from another Linux powered PC via mutual USB cable?
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1k views

computer shut down suddenly and now won't boot

I have a DIY computer that was built about 3 months ago, and worked fine until this week where it shut down suddenly while using Word. The only other application running at the time was Google ...
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121 views

Poweredge 2500 6C822 PDM Board Pinouts?

Okay, here's a strange one: I am trying to use an old Poweredge 2500 chassis to house a newer ATX-type motherboard. What I need to know is this: What are the pinouts for the 6C822 Power ...
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106 views

Installed a new PSU and GPU and performance doesn't improve

I installed a new 500w PSU and a Geforce GTX 660 GPU. And after installing all the newest drivers from Nvidia. I upgraded from a Geforce 9600 GT. And I should be seeing a MAJOR upgrade. But it seems ...
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22 views

PSU Issues - Antect 1000w Quattor

I have a server using a 1000w PSU from Antec. My Raid 6 was becoming degraded and I tried to repair without success. So I have looked at the drives and they are all operational. I have now found that ...
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283 views

No power, custom build with new parts, yet 850W PSU still works with old parts

I've just upgraded parts in my PC. was a few years old, built it myself then too. Got a new motherboard, RAM and processor. Connected everything and power lasted literally 1 second, then died and I ...
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59 views

Manually starting a PSU lowers the output Voltage

I have a PSU. When I start it using a motherboard, I get a little over 5 and 12 volts on the respective lines. But when I manually start it (by connecting PS_ON to ground), I get only 4.2 Volts on the ...
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80 views

Replaced power unit and computer won't show screen

I just placed in a brand new PSU and it's a 650W and more then what the system needs. The fans turn on but I don't get anything on the monitor. Ideas? No beeps. I can't tell if hard drive is running ...
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170 views

Unknown UPS back-up issues

I have a Powercom UPS IND606A. I am staying in India having voltage range of 230. The detail explanation of problem :* When there is a powercut UPS gives back-up but it restarts the computer. ...
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154 views

Gateway SX2300-01u CPU/PSU issues

I have a 2-yr-old Gateway SX2300-01u with an AMD Phenom X3 8550 that I feel has about a year or so of life left, but I am having a couple of hardware issues that I have not been able to resolve. ...