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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23 views

What does it mean when my HDD doesn't show any S.M.A.R.T attributes?

I have a Seagate 2TB HDD (about 3 years old) and I've started having strange issues since installing a new PSU (my previous one was on the blink as it kept intermittently restarting my PC). 1 day ...
0
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0answers
34 views

PSU/GPU/MOBO failing? I'm at a loss here

Here is my total system specification: System Information Time of this report: 11/22/2014, 21:41:56 Operating System: Windows 7 Professional 64-bit (6.1, Build 7601) Service Pack ...
2
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2answers
3k views

DELL Inspiron N 5050 doesn't Power On until I Plug-in the Charger

I bought a Dell Inspiron N 5050 last week, and recently discovered a problem with my laptop. It doesn't Power On until and unless I Plug-in the charger. After I plug-in the charger, it boots up ...
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2answers
3k views

System won't boot: Gigabyte HD 7790 1GB OC GPU issue or Corsair VS550 PSU issue?

Installed a new GPU, and PC won't boot. Turn it on and: No monitor signal at all (tried HDMI and VGA via DVI, on 2 working monitors). CPU and GPU fans DO spin, but No system beeps, no sounds from ...
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0answers
15 views

New build: i7 5820k MSI x99S SLI Plus, Need CPU Cooler, Case, PSU [on hold]

I'm building a new computer, so far I've bought these components: Intel Core i7 5820k Processor MSI X99S Sli Plus Motherboard Crucial DDR4 2133mhz memory - 4x4gb sticks totaling 16GB XFX Radeon R9 ...
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0answers
26 views

Is there a solution for powering fans (and/or hard drives) from a separate power supply, if space in computer case is limited?

I have a full tower with six hard drives and five fans. The computer has a blue screen of death about once per day, but I noticed that it does not happen if all of the fans are turned off (case being ...
1
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0answers
24 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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1answer
47 views

PC won't start. Not even to BIOS

I have a PC that’s just over a year old. Today, while playing a game, it suddenly shut down and I smelled a slight smell of something burning; no fire, don't worry~ After this “incident” my PC won’t ...
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0answers
6 views

reliable/redundant PSU for SOHO server build

I am after reliable SOHO server build. I went with ECC RAM, quality NAS-grade harddrive and now I am looking at the PSU. I cannot seem to find any good redundant PSUs that would fit into the ATX ...
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0answers
20 views

new hardware, pc won't display [on hold]

I've just upgraded my cpu, psu and gpu, and now my pc isn't booting. I've 8nstalled the fx9590 8 core into the asus crosshair v formula. As the pc booted with no warning led's, i assumed it was the ...
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0answers
40 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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1answer
10k views

Power cycles on/off 3 times before booting properly from cold start, no other issues (New System)

Relevant Specs: Sapphire 5850, core i7 920, Seasonic x750 power supply, ECS X58B-A2 mobo. From a cold boot, meaning all power totally disconnected at the wall, the system will power on for less than ...
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0answers
15 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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0answers
36 views

New GPU. Computer shuts down unexpectedly after (semi) intensive graphics use

I recently purchased a GeForce GTX 760 and ran into this problem. I had a GT 640 to begin with and had no problems what so ever(except for shotty graphics). I installed my GTX, updated my drivers and ...
1
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0answers
40 views

ASUS Anti-Surge Troubleshooting [on hold]

I assembled a computer last year, and I've had some trouble, but now I'm at a point where I'm just not sure what the best course of action is. Here is the problem, So about a week ago, I was playing ...
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5answers
30k views

Connect a 2.5" (laptop hard disk) SATA hard disk to Desktop PC

Can I connect a laptop SATA hard disk to Desktop PC? Do I have to use some adapters or I can just plug in SATA power connector and SATA data cable like my Desktop hard disk is connected? I noticed ...
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0answers
26 views

Dell docking station only works when power supply unplugged

I recently was forced to get a new Dell M6500 chassis and hard-drive for work to replace my old identical model laptop. I have a Dell docking station connected to some peripherals and a second ...
0
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1answer
35 views

Lenovo power supply

I have two Lenovo laptops and I can't remember which power supply adapter goes to which. One power adapter output is 20V and 2.25 amps, the other is 20V and 3.25 amps. If I were to switch the power ...
0
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1answer
24 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?
4
votes
1answer
171 views

Is it possible to get a chain burnt of processors/mb?

The problem is as follows: I just got my dad's computer and have (had) a bunch of MBs, AM2 processor standing out. His AGP slot had some problems and the computer refused to start with a video card ...
3
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1answer
3k views

Melting plastic around DC-in jack in laptop

I recently noticed that the plastic around the DC-in jack of my laptop was warped (melted) a little bit. Since I noticed, I have done some experiments, and saw that the metal tip of the charger heats ...
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6answers
5k views

Can touching any hardware inside a running PC be dangerous for you?

I'm curious, if all the hardware gets power from the PSU's DC power lines, which provide a max. voltage of 12V, can you get electrocuted by touching some of the hardware?
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3answers
139 views

Tired of AC power adapters [closed]

I have about 20 to 30 peripherals on my computers. Each one with its own &%$/&#$% AC power adapter. I really hate these power adapters. I am thinking of there's some kind of power supply I ...
1
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0answers
101 views

When unplugged, the UPS plug gives out current. Is it bad? [closed]

We have several power issues in our house like : Occasionally loosing bulbs (in two holders, the light bulbs went out two times. If we put a new one, it will go out after several days. One went out ...
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1answer
37 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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1answer
32 views

System won't respond to Power Switch

I ran into a problem - I can't start my new system at all: when Power Switch is pressed nothing is hapenning, even cpu/system fans are not moving for a split second. And I just was at the shop where ...
0
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0answers
16 views

Charging and external hard drive problems, possible low USB power output? [closed]

I have reason to suspect there is a problem with all of my USB ports power output for two reasons. Compared to other PCs my mobile phone charges very slowly (even when switched to flight mode) to the ...
2
votes
1answer
26 views

Do Graphics Cards with power connectors still draw 75W from the PCIex16 slot?

The PCIex16 slot on mainboards is specified to supply a maximum Wattage of 75W, so lower end Graphics cards don't need additional power connectors. What about Graphics Cards that do have one or ...
1
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1answer
248 views

Laptop's power supply discharges the battery 10-20 seconds after unpluging from wall

Everyday after turning off the laptop (not before) I'm unplugging the power supply only from the wall, not from both wall and laptop. But it started to discharge the battery. After unplugging the ...
0
votes
1answer
38 views

How do I turn off MagSafe light?

When I go to sleep at night, the two green lights (emitting from both sides of the MagSafe connector of my 13" MacBook Air's power adaptor) light up my whole room. How do I turn these off? I ...
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1answer
17 views

Using Thinkpad X131e charger on Ideapad S10e

Can I use my Thinkpad X131e charger on my Ideapad S10e? They have different ends. I figured that instead of buying a new charger, it would be cheaper to buy a converter. The voltage of my charger is ...
0
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1answer
43 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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1answer
327 views

High pitched whine when laptop is plugged in

My relatively new Toshiba Portege r705 laptop (running Linux) has started making a high-pitched whine when plugged in. The sound is usually only noticeable when the laptop is in use and the battery is ...
0
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1answer
31 views

Can a PSU break a Graphic Card?

My PSU stop working and dont restart, I think it was by overheat. This not the problem because I'm upgrading it this week. The problem is that I connected a GTX 760 which requires 500W, to the 500W ...
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0answers
35 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 ...
22
votes
3answers
1k views

Why is a pin missing on 2x12 PSU cables?

I just noticed that finally entry model PSUs are now giving 2x12 power leads rather than needing to use a 2x10 in addition to a snap on 2x2. For the first time I actually looked at one and I thought ...
2
votes
2answers
50 views

Why is -12V needed on an ATX power supply

Checking the standard ATX connector pinout it mainly gives out "standard" positive voltages, like +3.3VDC, +5VDC and +12VDC. There is one exception, pin 14, which actually gives out -12VDC: Based ...
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3answers
70 views

What do OUTPUT charts of PC Power Supplies mean?

I'm looking at various power supplies and they all come with different output cables. They also have different OUTPUT charts, for example: What I'm wondering: What are these output columns are ...
0
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2answers
39 views

My Toshiba Satellite c850 won't display screen

Before this happened, I had some occurrences where my laptop's screen turned off out of no reason. Everything was still on (the sound, tasks in thr computer, fan, etc. was working). I tried closing ...
0
votes
1answer
45 views

Why does my Samsung laptop computer think it is unplugged?

Samsung laptop, purchased new in 2012. Windows 7 64-bit. 8GB RAM. Model NP300V5A. I woke up one morning and woke the laptop. I had left it plugged in to the wall the night before. When it woke, it ...
0
votes
1answer
382 views

All indicators start blinking when I plug in my Lenovo laptop

I have a Lenovo S400. Recently, this weird behavior started. When I plug it in, all the indicators, power LED, charging LED (blinks red) and power button start blinking together. It seems like a ...
8
votes
7answers
17k views

If my power supply is 700w, do I need a 700w UPS?

if my power supply is 700w, do I need a 700w UPS? I am running dual 20" dell LCD's, a i7 quad core system with a radion 4870 1gb video card, 2 hard drives.
1
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2answers
328 views

Is My PSU compatible with this UPS

I have this PSU and this UPS, however due to the PSU being/having an active PFC (power factor correction) it is incompatible with my UPS (at least according to APC tech support, for reference see my ...
0
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1answer
37 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 ...
0
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0answers
31 views

Does an SDD use less power than a platter/regular drive? [duplicate]

The answer to this question seems obvious to me but I'm asking it in case I've missed something. I have a laptop with a small SSD drive and a large regular/platter drive. I keep a collection of ...
6
votes
2answers
36k views

What is the power output of a USB port?

As the title says, what's the power output of a USB port? Is it a standard value, or it may change depending on manufacturer/model, and so on? If that value is not standard, how can one determine ...
2
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1answer
59 views

Laptop only turning on when pressure is applied

I'm trying to help a friend fix their Toshiba Satellite A665 because its been shutting itself off at random times until it got so bad that it doesn't make it past the BIOS screen before shutting off ...
0
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1answer
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 ...
0
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1answer
2k views

Computer won't start, just blinks on and off

I had a computer that was working fine for over a year, then suddenly it started to shut off, it got so bad that I press the power button and in around 30 seconds while booting Windows it would shut ...
0
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1answer
32 views

Asus laptop doesn't turn on

My girlfriend has an Asus laptop with a battery that dosen't work, so she uses it while it's connected to the wall. This laptop has been in use for 2 years+ I think, and today suddenly, it stoped ...