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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New 450w PSU boots up but no post/signal from the motherboard

I have a problem reagrding my new 450w that's not functionning correctly, there is no post or any signal from the motherboard. I made sure that other parts are working. here is the config: CPU: Intel ...
2
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1answer
28 views

HP 4530s laptop works with power cord but won't charge battery

Suddenly, two days ago my HP 4530s laptop stopped to be able to charge its battery. Since I was noting that the whole battery was dying since some weeks ago, I bought a new one. Either with the old ...
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1answer
38 views

DC-input motherboard How does HDD get power? — ASRock H81TM-ITX

This may be quite a simple question, but I do not know much of anything when it comes to building motherboards, voltages, wattages, and power. I am looking at this board - ASRock H81TM-ITX ...
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1answer
40 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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2answers
19 views

Green light on my laptop adapter continues to glow for 2 to 3mins, even when it's not charging

I can see a Green light on my dell laptop adapter even when adapter is being used and connected to a power source. As per my knowledge this idicates that adapter is plugged in to power source and ...
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2answers
35 views

How to find the source of a burning smell in my computer?

Recently I find small unpleasant smell (like burning smell) from my desktop computer, not always, but from time to time. I don't know where it is from, but as I turn off the computer and sniff closely ...
2
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2answers
39 views

Static electricity - Our computers were covered with black trash bags for about six months, is that bad?

A laptop and two desktops have been covered with big trash bags to protect them from dust for quite some time. Is there any danger of anything getting damaged from static electricity? Is there ...
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0answers
8 views

My Brand new cpu hanges [closed]

here is the detail of my pc which I have purchased around 10 days before asus 2gb ddr5 RADEOn R9 270X COOLER MASTER SEIDON 120V PLUS COOLER FAN AMD FX 9590 PROCESSOR CPU CORSAIR VENGEANCE DDR 3 ...
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9 views

POE Adapter + TP-Link Outdoor CPE blinking light

I'm trying to set up a wifi network using an outdoor CPE (TP-LINK WA5210G) connected to a POE Adapter (Ubiquiti Switching Mode Power Supply) for an NGO I'm volunteering with. The people claim that the ...
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1answer
16 views

How can I measure the power consumption of the different devices connected to my computer?

I recently bought a new graphics card and I want to see if I am going to run into problems trying to use it with my desktop's measly 300W power supply. I am running Ubuntu 14.04. Is there anyway ...
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0answers
11 views

Antec VP450 power supply doesn't power on

I have a 3 year old Antec VP450 PSU. It has a power switch behind it which I always switch off after shutting down my PC. This PC is connected to an APC UPS. Yesterday I shutdown the PC and left ...
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31 views

Computer shuts down under load [closed]

I recently purchased a 290X from AMD and installed it in my system. Downloaded all of the drivers and got it all up and running. Was absolutely blown away by the performance, it running 80FPS ...
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1answer
33 views

Can my 300W power supply handle this graphics card?

I want to but this graphics card: http://www.amazon.com/gp/product/B00IDG3IDO/ref=oh_aui_detailpage_o00_?ie=UTF8&psc=1 It says it requires 300W or more. My power-supply is 300 max. Does ...
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2answers
40 views

Windows 8.1 sleep fails if computer left on mains power

This is a weird one. On my Windows 8.1 system, I usually Sleep the computer overnight rather than Shutting it Down. If I wait for the computer to finish "going to sleep" (so the fans stop running, ...
7
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1answer
597 views

Why won't my Retina MacBook Pro let me plug the power in without the screen blacking out?

I have a late 2014 Retina MacBook Pro. I run Windows 8.1 via Boot Camp with the latest drivers. It worked fine for quite awhile as a standalone setup. Recently I started using it only with an ...
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1answer
29 views

Power Brick humming [duplicate]

When a power brick is humming is that a bad thing? What does it mean. Does having it plugged into the wall directly or in a UPS or in a daisy chain of power strips make a difference
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0answers
71 views

PSU very loud on idle system

i have a very weird problem- once in while( once or twice per day usually) my PSU starts being very loud(probably max fan speed) even while the system is idle. The only way to fix it is to shutdown, ...
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3answers
43 views

Replaced burned out PSU still burning smell

So I recently replaced my burned out PSU, and have just started my PC. But I still smell something burned out, although my PC is running fine, what could it be, and what should I do? I just checked ...
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0answers
45 views

PCIe power from a Dell Optiplex 7020

We've just purchased a new Dell Optiplex 7020 to house a PCIe digitiser for use in scientific work. The PCIe card in question needs extra power in the from of a 6-pin 'PCIe' power cable. ...
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0answers
22 views

Laptop won't turn on, only power button lights up

My laptop is failing to turn on fully. The only thing that happens with the laptop is the power button lights up. It stops lighting up after about 8 seconds of me pressing it and once I release it, it ...
0
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1answer
45 views

2 new Caviar Blue hard drives failed within hours on new build

I made this standard desktop build for my father with an Asus AM1M-A mboard, Athlon 5150, 4GB Kingston DDR3 1333MHz (2x2GB), EVGA 430W 80 Plus PSU, and a Western Digital Caviar Blue 500GB HD ...
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1answer
18 views

MSI GX660 laptop power fluctuations

Okay. So my trusty laptop has come down with an issue. It won't always take my power supply, resulting in 2 cases. One is that it simply does not receive the power, the other is more peculiar. The ...
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3answers
41 views

Burned PSU possibly damaged hardware

My PSU recently burned out, I don't know if other hardware was affected is it safe to buy a new PSU and use my PC as I normally do? How do I check for potential damages? CPU: i7 2700K 3.5GHz GPU: ...
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1answer
54 views

What will make computer parts (PSU, MB, SSD, HDD, Fans) last longer: keeping PC always on or turning off regularly [closed]

Before I continue, there is no answer to this question on StackExchange. One is Is it harmful to keep PC always on? [duplicate] a duplicate of Is it better to leave your computer on all ...
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0answers
79 views

Notebook's Battery is not calibrated. Operates at 0% for an hour

My problem is that even if the battery percentage is 0 the notebook can stay on around an hour. I have disabled "critical battery action" on my operating systems to use more time my notebook. The ...
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0answers
21 views

What could cause an abnormal voltage measure from the PSU besides a defective PSU?

For a while now I've been having random system freezes and reboots, especially when the GPU is under load. I looked in the bios and saw the 12v rail giving out 17v (!). Assuming this is a faulty PSU I ...
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3answers
142 views

My GPU stops suddenly and get black screen

I have a Nvidia GeForce GTX 660 graphics card and a dual monitor setup. Sometimes my screens go black and get a warning like: Nvidia Kernel stops responding. I tried a lot of things; ...
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2answers
46 views

Desktop not powering ON

I have a weird issue of our desktops supplied to customers. At customers site they are not turning on but when I bring it my office it is working fine. It tries to start at customer site, fan starts ...
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0answers
11 views

Laptop fan starts, stops, starts, stops and continues like this

I have a Dell Latitude E5430. With normal BIOS settings my fan was not working until the core got heated upto 60 C. I installed speedfan to control my fan. I have set the fan to a 100% all the time. ...
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0answers
11 views

Using Nzxt pp500w psu with new hardware - Safe?

I have Nzxt pp500w psu with Nzxt alpha Case. I'm planning an upgrade to the CPU and the motherboard to the following comination: Intel Core i5 4460 3.1Ghz (3.3Ghz Turbo) LGA1150 Arctic Cooling ...
13
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5answers
2k views

What is the 6-pin power connector on an HP ProDesk?

I have an HP ProDesk 600 G1 desktop PC, and I'm upgrading it with a new graphics card and a new power supply. Now, the problem I'm having is that the motherboard in the PC doesn't have a standard ...
0
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1answer
49 views

I have some problems with my power supply. Or maybe my Graphics Card?

I have some problems with my PSU. Sometimes when I start on the computer I can hear weird motor-like sounds coming from the PSU but it is probably the fan hitting a component or something, but it is ...
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0answers
34 views

Dual PSU Advice

i have a fairly simple question, that will likely have a complicated answer. i have this pc | / Specs off the top of my head as the pc is dead atm: CPU: AMD Phenom x4 HDD: 750GB 7200rpm Sata 6 ...
0
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1answer
51 views

Dell AC adaptor flickering green light and won't charge laptop

I have a Dell Latitude E6400 and recently the charger blinks the green LED and wont charge the laptop. After a while however the laptop charges, and then this may occur again after a couple of hours, ...
0
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1answer
60 views

Only allow laptop to charge battery to 95%?

My laptop makes a very loud noise (coming from some CPU idles state / power saving mode). This is a well recognized problem, and people on the internet seem to have not found a solution yet. The ...
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0answers
83 views

cpu idle state - power plan windows - high pitched noise

I have a Dell XPS 15 9530. One famous problem is the "coil whine" or "high pitched noise" issue. The noise only occurs when (a) the cpu is in IDLE, (b) battery is fully charged. This suggests that ...
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votes
2answers
63 views

What components in a computer have the potential to damage a GPU?

Something in my computer is damaging any graphics card that is put into the computer. I would like to know what components have the capability of damaging a graphics card, and how to determine which ...
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3answers
27 views

Real Machine randomly refuses to start

Folks I`m completely clueless. I have a machine with the configurations above. By some strange reason at random times it refuses to boot, fans will spin but seems no power enough is generated to get ...
0
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0answers
36 views

Satellite L745 Battery - Plugged In but not charging

When the adapter is plugged in to charge the battery, battery status show as Plugged in, not charging. When battery is plug to the laptop, can't turn on the laptop. I have to unplug the batter and ...
0
votes
1answer
40 views

Dual boot, two disks and poweroff unused disk?

I have set up my desktop from scratch as following: MSI B85M-P33 motherboard Crucial Sport 4GB installed RAM, will be expanded soon to at least 8GB Coolermaster N200 case Coolermaster G450M psu ...
1
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2answers
55 views

Loose power-cable connection

Low-tech but high-consequence. I have a laptop with the power-cable connection causing the power to be disconnected if it gets moved a bit. I've tried with other cables and get the same behavior, so ...
2
votes
4answers
261 views

Does charging a Li-ion battery smart phone through a computer's USB port put additional strain on the battery vs a wall charger?

I was curious about this. I read that you should generally avoid completely discharging and then full charging your Li-ion battery because this can strain the battery (though some suggested doing this ...
0
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0answers
35 views

Computer slow after plugged into wrong voltage

So I set up a desktop computer running ubuntu in a classroom that was running through an AVR at 220 volts. I got a report that it wasn't working, so I came to look at it, and sure enough, fans and ...
-1
votes
3answers
48 views

Shortwiring a PSU WITHOUT Paper clip

So, in a haste to power up the PSU after the paper clip test, I cut all the wires from the 24 pin connector and tried to connect the green and the black wires directly. However, the fan on the PSU ...
1
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2answers
55 views

Ran power through a USB port- am I out of luck?

I'd like to preface this by saying I'm an idiot. Long story short, I stuck my Acer Aspire V's power cable into one of its USB ports and the computer unceremoniously died. Plugging it in shows no ...
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0answers
21 views

New motherboard just start in a special case but no display

Hi wanting to give a facelift to my current pc, I bought a mother board ( ASUS Z87 -c) and an i5 4670k cooled by Hyper 212 Evo, I build it and wants to test if everything works. For this I unplug the ...
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1answer
101 views

3-pin CPU cooler on socket 1150 has allways only constant fixed fan speed

I have following PC configuration MB ASUS Z97-P with Intel Core i5-4460 Cooler Master X Dream i117 As per here the cooler works well on 1150 socket. But ASUS Fan Xpert cannot adjust the cooler ...
1
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1answer
90 views

Power Supply Rating versus Graphics Card requirement

Windows 8.1 64 bit Lepa N500 Power supply GTX Geforce 650 ti boost My Lepa N500 Power supply is rated at 500 watts. I read some about PSU's and it says that the overall rating isn't really what ...
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votes
2answers
62 views

Gpu or psu is making a metallic whirring sound when I open up a game

When I open up a game my computer starts to make a weird sound even if I'm just on the title screen, I not sure if its the gpu or the psu. I suspect the psu does not put out enough power for my ...
1
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2answers
87 views

How to use wifi router as PoE?

Is it possible to use wifi router as PoE? This is a picture of my network connectivity. My PoE is not working properly. So I am thinking of connecting the Ethernet cable(which is the cable from ...