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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124 views

Power Supply vendors/part numbers for Promise NS4300N?

Good morning all! My problem is relatively simple: I have 2 Promise NS4300Ns, both have dead power supplies. Disassembling a 3rd yielded a Mini-ITX format power supply with a proprietary power cable. ...
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76 views

Using netbook motherboard in PC build, need way to press power button from 7-8 inches away

I'm using the case out of an early Sega Genesis/Megadrive to build a low power emulation/media PC. The following picture is an aerial view. The power button is on the top right, but underneath the ...
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226 views

Reason for computer not booting when power button pressed

I have a following problem starting my desktop computer and I'm trying to figure out the root cause. Most of the time it will just start normally when I press the power button. On some occasions ...
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26 views

Computer can't boot

I have a 1 year old PC and the last weeks, when I press the ON button the PC doesn't power on ( Like I didn't press the ON button ). I have to plug and unplug a few times the power cord in order to ...
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1k views

How to measure power consumption in Windows 8

I want to measure real time overall power consumption of my laptop and I would do it with a software. After some searchs on the web I found out that Microsoft developed Joulemeter, a software able to ...
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40 views

How to make that computer turn on by external power on?

I have remotely controlled power supply, and I wish to implement cold reboot with it, for cases of unrecoverable hangs. Unfortunately, once power is off, computer is not turning on when power appears ...
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43 views

Can I diagnostic/check my PSU?

I'm soon about to upgrade certain parts of my computer, CPU, Motherboard, Memory.. those parts are from 2009, and have served me well through countless hours of programming and gaming. my PSU is from ...
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229 views

Agghhh! UPS Back-Up, Laptop Charger, Sparks

Boy… ok. This is so frustrating! Ok so, I've been getting a whole lot of problems with the electrical grid here lately: spikes, surges, lows, brown-outs, all kinds of problems, it's terrible, ...
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89 views

Failing CPU, PSU or Motherboard?

So i have a HP desktop and when I press the power button all sounds well (fans, hard drive) but then it turns right back off within 7 seconds. There are No beep Codes, or noises. So I am trying to ...
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280 views

ASUS X501a does not start up(fan spins, HDD does not spin, black screen)

Repairing my friend's ASUS X501a laptop. After power up, it goes into a black screen. The fan spins a few seconds after powering up , but HDD refuses to spin. I have tried the following: Plugged a ...
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902 views

Getting constant APPCRASH on Kernelbase.dll

Specs: GIGABYTE GA-990FXA-UD3 AM3+ AMD 990FX + SB950 SATA 6Gb/s USB 3.0 ATX AMD Motherboard AMD FX-6350 Vishera 6-Core 3.9GHz Socket AM3+ 125W Desktop Processor FD6350FRHKBOX G.SKILL Sniper Series ...
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1k views

How to optimize battery lifespan of Lenovo Z510?

I just bought a Lenovo IdeaPad Z510 laptop, and before I boot it for the first time, I want to make sure to know the exact proper care to ensure the best optimization of the battery's (4 cell 48 ...
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33 views

Is power outage dangerous in BIOS?

I recently had problems with my adapter for my laptop, and I think there is a problem with the connector. But to know that, I have no other solution but to test if my computer is powered or not. Since ...
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136 views

ATX PSU: Pin 9 reads a lower voltage when plugged into motherboard

I'm pretty confident that the PSU is bad in this computer, but I want to understand what my multimeter is telling me. With the PSU plugged into the wall only, the multimeter says that pin 9 is a ...
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27 views

PC Shut Down & Blue Screening?

I have recently upgraded my motherboard in my computer before that I had a standard small board but now I have a big gaming one (forgot the exact size names think its atx or something) Anyway, ...
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84 views

how do I know whether a fan error on post requires action?

I have an HP a6400f PC, (it's a tower) and after a brief power blackout, I started getting a generic "Fan error" problem upon startup. I can click through the error and boot into Ubuntu. ...
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39 views

My PC crashes without any message

Is aerocool e80-500W compatible with Haswells? Motherboard: asrock z87 extreme6 CPU: i7-4770 RAM is compatible with this MOBO. I disabled C-states in UEFI howerver it crashes sometimes CPU is not ...
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47 views

Reduce voltage on psu from 52v to 12v

I'm building a mining rig and is planning on using a ESP120 HP 3Kw 52v powersupply. I've seen someone get it down to 48v with this mod, but i wonder some one got it down to 12v? Or is it not possible? ...
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213 views

Powering a HP BL680c Blade Server Without a Rack

I picked up an old HP BL680c from a computer surplus store and have no rack with which to power it. The board seems to indicate that it merely requires 12V in. When I try to run it off of regular 12V ...
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115 views

Hard drives not always recognize

I'm having an issue. 80% of time when I power on my computer my hard drives aren't recognized (on BIOS). It's really random. I have a 4770k i7, an asus maximums IV hero, an SSD kingston 128g, a ...
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133 views

Does the laptop power supply the SATA drive from battery even being powered off?

I have a Fujitsu Lifebook s762 with a native SSD drive. After a couple of months or so - the SSD became the "brick". I read the article and remembered, that just before the failure, I shut down the ...
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34 views

Shorted laptop due to human error

One of the kids put the end of the universal charger on the wrong way round, then plugged it into the laptop. Now neither the charger nor the laptop will work. I'm no power supply expert, but I'm ...
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784 views

How much power can a 3/4 pin fan connector handle?

I was thinking of buy 5 very high power 120mm fans. These ones to be sepcific. Delta PFB1212UHE. These fans require a lot of power. They are 4 amp, 48 watts. They sell them with the 3 pin ...
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112 views

Compatible power supply for Radeon 280x Graphics Card

My friend and I just bought 2 Radeon 280x graphics cards, found here: http://www.newegg.com/Product/Product.aspx?Item=N82E16814127759 In addition, we have an older PSU ...
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310 views

Asus Anti-Surge problems?

Well I just disabled Asus anti-surge thinking that absolutly nothing will happen and it wouldn't bugger up my PC in anyway posible. Well it did. I was playing a game and suddenly it powerd down and ...
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165 views

New PSU won't power on with GTX780, works fine with 9600GT

A friend of mine had a PSU blow in the middle of other rotten luck, so I have him my PCP&C Silencer 910w and bought a SeaSonic SS-660XP2 (660W 80+ Platinum) as the replacement. It's a much ...
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94 views

Computer shut down even when it is on AC & battery

My laptop is around two years old. I first receive a message to replace the laptop battery a few months ago. I therefore took out the external battery and powered the computer with AC. But it started ...
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1k views

USB Keyboards Randomly Disconnect

I have a puzzle for you; I've been banging my head against the wall for the past week trying to figure this out, and I just have no idea what it could possibly be. If you can figure it out I will give ...
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173 views

Computer randomly shuts off, and won't start until power is reset

I have been having an issue with my computer lately. The computer randomly turns off, as though someone pulled the plug, except and USB attached hardware, and motherboard remains powered on. The ...
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375 views

Mouse Hang with voltage fluctuation

I bought a new assembled PC about a month ago, but for the past 7 or 8 days I found my mouse cursor hangs every time there is a voltage fluctuation on my UPS (when sound comes from the ups the mouse ...
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181 views

Game freezes and sound turns off for 2 seconds after light switch is turned off, can be reproduced

I have similar issue as this Question Weird things happen to my PC when light switch is turned off Each time the light switch is turn off in the kitchen while I am playing DOTA 2 the sound turns off, ...
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375 views

Battery Error 601 HP Pavilion dv6

The computer that i own is currently around four years old, that battery has worked perfectly up until the last year, i've been doing a LOT of research recently into why the battery is not working ...
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275 views

Bios access key not available on screen. Will not boot

I recently changed the power supply unit in my home theater PC. Computer will not boot. Won't go past 1st screen. Shows somme bios info (version memory dual channel etc) . Also says F11 for boot ...
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76 views

hp 9340f power supply keeps cycling of and off without reboot

computer or power supply don 't know, power supply keeps recycling on and off every 5 or 6 seconds. power light in front lights up, green light in back on power supply is on, fan is on. Then ...
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402 views

Can I power a nexus 7 through a powered USB hub?

I am building a setup to use my Google Nexus 7 as a SNES. I have the games figured out, and my plan is to plug a USB hub into my OTG cable which is plugged into the device. In the hub, there are two ...
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475 views

Why is my UPS causing my monitor to make a high pitched humming noise

I recently purchased a UPS for a new server build for my home. Since the server sits next to my desk, I figured I'd plug my Macbook and monitor into the UPS as well. That way if the power goes out, I ...
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469 views

Gigabyte GA-A55m NO POST

Just put together a new computer with some basic parts from newegg. I am getting no video, and no post at all. Nothing from the speaker. The speaker definitely works as I have pulled the memory and ...
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798 views

Power-on button takes a long time to work after PSU is turned on

I have a four-year-old Dell Inspiron 530 desktop with onboard video and recently it started to show this weird behavior (sorry, it’s a long post…). The computer is connected to a voltage regulator, ...
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111 views

Asus GTX650: Underpowered it and it is no longer detected. Driver issues or damaged?

I installed an Asus GTX650 graphics card into a new computer (i3-3220, reasonable decent motherboard that would support it). I failed to take into account for the PSU, which just about matched the ...
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456 views

How can I fix a dell xps1530 laptop battery that will not charge all

I have a dell xps 1530 laptop. The laptop initially came with windows vista. However, I once upgraded to Win 7 64 bit and it was working alright till I started having problems with a few software that ...
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1k views

computer won't turn on but plugging in ethernet lights up switch

I have an issue where my computer/motherboard won't turn on, I am not sure if it is fried but when the ethernet is plugged in the light on the switch turns on, meaning that some kind of current is ...
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651 views

PC crashes with Power LED Blinking at 1 Second Interval

I have a "server" that recently has started crashing around once a week. I have yet to find a reason for the crashing but the nonrecoverable nature of the crash is unusual. The machine is standard ...
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78 views

Pc monitor gets fuzzy

After replacing the heatsink and power supply, the monitor got very fuzzy and grainy. I have changed the cable and even replaced the monitor but the issue remained. It seems that the monitor is ok ...
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25 views

Computer loses all installed programs and appears to return OS-only state

This is a story regarding 3 laptops of different brand and models. On separate occassions, I configured each of these Windows 7 / Vista computers with the necessary configuration and applications ...
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175 views

Is there a way to measure the current erogated by a psu during it's usage?

I'm trying to test a psu, to establish if it is reliable or not. The voltages on the various connectors are ok, but I'd like to know if there's a way to measure the current that flows in the cable ...
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524 views

600W power supply + Asus P7H55-M PRO: power light flash and turned off

I have an old Asus P7H55-M Pro motherboard: http://www.asus.com/Motherboards/Intel_Socket_1156/P7H55M_PRO/ and recently I bought a new 600W power supply (Coolmaster brand) but after I put all pieces ...
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141 views

Dell XPS 1330 / 1530 - Won't turn without power lead, but you can remove power lead once turned on?

As the subject states, I can't turn on my dell xps 1330 without the power lead in. There is nothing from pressing the button. It has a newish fully charged battery and have tried a couple of good ...
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661 views

Understanding why a 450W power supply is destroying my ATX motherboards but not mATX

Maybe I'm missing something really obvious here, but after going through 3 new motherboards in trying to build my new machine, I'm finally certain that the 450W power supply I bought has been ...
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920 views

Hard drive randomly stops reading/writing - underpowered PSU to blame?

Ever since I replaced the graphics card in my Shuttle, the computer has been acting a little "odd". Sometimes the hard drive will just power down. Windows will still continue to function, but doing ...
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3k views

Gfx card issues: ASUS Nvidia GT640-2GD3

I have a similar problem to the poster in this question: New GPU power supply woes (ASUS GT640 + HP XW4600) I also have a HP XW4600 and the gfx card: ASUS Nvidia GT640-2GD3 The card doesnt seem to ...