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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How to configure Windows 7 in live mode (readonly C:) like Linux

I usually create headless box with a raw Debian and AUFS file system to set the CF card in read-only mode. All is load in RAM and not change append on CF card. So i can safely shutdown the box by ...
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3answers
37 views

Why isn't my computer turning on past boot screen?

I have an old server computer from 2005 that still has a lot of potential in my opinion. I acquired it from my dad’s old storage unit. It was running well for about a month and then one day—in the ...
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0answers
15 views

Can I use a 130V AC adapter for my european laptop? [duplicate]

I have an old Dell XPS Studio 16 whose AC adapter broke a while ago. I've been using a universal adapter, but apparently Dell has some hardware checks hard coded that won't let the adapter charge the ...
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2answers
1k views

Why is the battery dead inspite of the full charge the previous day?

My laptop is 9 months old. In which I sparsely use the battery of the laptop as I am connected to the power outlet most of the time. This problem has started since 4 days. As per this post my system ...
2
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1answer
20 views

Computer randomly restarting in the middle of some CPU and GPU activity (viewing videos, gaming)

Asking on behalf of someone I know. His current build - Processor: Core i7-4770k RAM: GSkill Sniper Series DDR3-1600 8 GB total RAM 4 x 2 GPU: EVGA GTX 780 SC SSD: Samsung 120GB 840 Pro PSU: Corsair ...
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2answers
26 views

Does a PCIe 8pin power cable use just one 12V rail.

Looking at a diagram below of a PCIe power supply connector it shows it has 3 12V pins. When it's plugged into the PSU how many 12V rails does it use? I assume it is just one, but how does that work? ...
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1answer
20 views

PC Rebooting randomly. PSU failure or not?

Sometimes when I play heavy games my computer reboots/turns off without prompting, blue screens, ... It just shuts down after 5 minutes of gaming, but it happens only with specific games (ONLY Star ...
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0answers
25 views

Will an 500VA UPS work with a 450W PSU? [on hold]

I have a COOLERMASTER GX 450W RS450-ACAAD3-EU PSU and a 4 years old APC BE550, 550VA UPS currently. I can buy an APC Back-UPS BK500EI / CS, 500VA very cheap currently. Would it work with my PSU? (The ...
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0answers
17 views

NIC on PCI bus only works when attached to POE supplying network

This is a strange one.... I have a PC with both an on-board NIC and an additional NIC in a PCI slot. The NIC in the PCI slot will only create a link when attached to a network which supplies POE. ...
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2answers
34 views

How to get enough watts for Power Supply

I have a Pre-built computer it's the Phantom 410 case with AMD-FX 6300 prossesor, but the power supply is only 150 watt. I want to add a fan, but I can't buy a new power supply, so how do I use power ...
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1answer
46 views

How to discharge static electricity

I'm building a new PC. I never cared about grounding myself because I've never had problems, but this time I don't want to take any risks. This is a new PC that doesn't have a power supply installed ...
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0answers
26 views

I keep getting the usb inserted sound whenever I plug or unplug something to a power socket. Should I worry?

I own a Lenovo G510. I use a cooler base external mouse keyboard monitor 2:1 speakers Whenever I plug something to a wall socket that is near to the one that I use to power everything (when ...
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0answers
25 views

Computer won't turn on after Shutdown without turning off the power supply for a minute

In the past month, for some unknown reason everything in my PC started to fail one by one. From CPU to hard disk. In the end of replacements and buying new ones, I have this: MSI 970A-G46 (new) AMD ...
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0answers
17 views

PC won't boot with more than one monitor plugged in, but once booted, works perfectly with multiple monitors

So my graphics card is an asus nvidia geforce gtx 750ti, and works perfectly with multiple screens. The problem is that the computer will not boot with more than one monitor plugged in, but after it ...
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0answers
33 views

How do I get my 3rd chassis fan running?

This is the first time I ever opened a pc, so I'll try to explain carefully what I did. My PSU died and I bought a new one, and reconnected the cables myself. (New PSU: Cooler Master GM G650M) ...
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2answers
35 views

Why do PSUs have multiple lines (cables) with the same voltage? (even if they are wired in parallel)

For this question i need a technical\engineering answer. Why are there multiple cables carrying the same voltage? Since they are wired in parallel both in the psu and in the motherboard (i checked ...
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1answer
21 views

Necessity for new cooling unit when moving from a Core 2 Duo to a Core 2 Quad

I own a desktop with the MSI P965 NEO-F motherboard installed. As you can see from the link, this motherboard can only accept Intel Core 2 Duo - generation processors, with the LGA775 socket. It is a ...
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1answer
531 views

When is too much voltage too much on a PC?

TLDR: The BIOS shows voltages as vcore: 1.248, 12V: 12.566, 5V: 5.160, 3.3V: 3.424. Is this bad? I got one miniITX motherboard that supports a 19 V laptop input instead of the regular ATX ...
0
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1answer
48 views

No beeps and no display when I power on PC

The fans are working. There is no beep even in removing the RAM. I tried everything that I found on the internet, but nothing worked for me. Can anyone help me? I have an Onboard video card. ...
0
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1answer
33 views

Bricked my computer instead of the kindle fire?

I was rooting a kindle fire for a friend and now my pc doesn't work. Symptoms are: inputs no longer work (usb or serial or dvi; hdmi produces a flicker but displays a message "no valid input" so I ...
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0answers
14 views

Laptop power supply wattage differences on identical specs?

I was comparing the Macbook Pro 15" 2015 (highest end) with the Lenovo W541 with similar specs (same CPU, very similar GPU, etc.) and the MBP is supplied with a 85W power adapter, while the Lenovo has ...
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1answer
17 views

Should I replace the AC charger as well when buying a new battery? [closed]

My notebook is already 4 years old, and it's battery basically died from one day to another (one day it could support the notebook for an hour, the next day I could get at most 2-3 minutes out of it). ...
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1answer
19 views

Can I use a different laptop power supply, same tip polarity, voltage, at least same amperage

My understanding is that new Lithium-Ion batteries can be dangerous because of some of the circutry surrounding them. To put it simply you do something wrong and they will start on fire or even ...
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1answer
55 views

Lenovo X1 Carbon suddenly slows when AC is attached

Today I notice that my one year old laptop Lenovo X1 Carbon (Windows 8.1) is 2,5 times slower on everything, only when AC is attached. As soon as I detach the AC to go on battery, performance ...
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1answer
35 views

can i add a graphics card to this laptop?

I have an HP Envy 15 laptop with specs at http://www8.hp.com/h20195/v2/GetPDF.aspx/c04514967.pdf . I want to add a GPU to the free PCI Express x1. There are two issues, one that the GPU's generally ...
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0answers
31 views

Canned air spray got liquid all over my PSU [duplicate]

Wanted to remove dust from my PC with a canned air aerozol "duster". Tried it a couple of times without applying to my computer and all seemed fine. Decided to go for the PSU first: since it's a the ...
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1answer
19 views

Graphics card doesn't output

I had a fully working computer set up with a Corsair CX600M PSU, and a Radeon HD 5450 GPU, but I needed a more powerful GPU, so I bought a Gigabyte R9 280x, (This one: ...
0
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1answer
37 views

Do the molex connectors on a 2x molex to 6 pin PCI connector need to be on different leads?

My video card came with an adaptor like this Its 2 gaptoothed male molex connectors (with horribly non standard colour coding) connected to a 6 pin PCI-e power connector. I got it with a zotac ...
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0answers
12 views

Powerline Network cuts out when Laptop Power Supply is plugged in

I have a powerline adapter in my room because it's too far away from the router to get a good wifi signal. I have my main laptop plugged in and that works fine. However, I tried plugging in a second ...
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2answers
32 views

What do I need to power a device via USB?

I have USB Y cable and if I am correct one of them is only for the power supply. It was suggested to that I get a USB powered hub but I only want to supply 5V of power for a single port. Would it be ...
0
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1answer
27 views

Is it necessary to turn off power supply switch to monitor when you shut down your computer?

The computer monitor gets its power from an adapter, while the adapter is connected to the a power strip with its own switch. When the computer has been shut down, the monitor indicator keeps ...
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1answer
62 views

Computer shut off randomly - no overheating

This is the first time this has happened. I started my computer, and 40-50 mins in, it shut off. No screen, no lights, nothing. I believe the ssd or vents still made some sound though (yes, my ssd for ...
2
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0answers
56 views

Desktop PC has stopped powering up

I've gone through the two existing questions I found that seemed to the closes to my situation, tried most of the proposed fixes, and I'm still not getting any results. Those questions where: ...
0
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1answer
53 views

Why is my computer shutting off during gaming?

My computer started crashing a few months ago, but it's only occurring during gaming, usually after about 5 minutes of gaming. When it crashes, I cannot immediately press the power button again to ...
2
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0answers
20 views

Third-party AC adapter for Acer Veriton L460 desktop causes fans to continuously run at full speed, even when system is powered off

I'm not sure this is the the right place to be asking but it seemed like the best option. I acquired an Acer Veriton L460 (Ultra SFF Desktop) which requires an AC converter of 19V 17.1A so I ...
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0answers
36 views

Desktop overheating room, is it CPU, GPU, or PSU?

If my door is shut, my computer turns my room into an oven, it's that bad. I'm hoping replacing a part will resolve the issue. Here's some specs: CPU: AMD FX 8320 Eight core GPU: AMD Radeon 6670 PSU: ...
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0answers
14 views

Power Issue- Not charging

I have an Acer Aspire V5-571 that is not registering the charger is plugged in. The ac adapter is in perfect known working condition. I have replaced the power jack thinking that was the problem, to ...
1
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1answer
16 views

Can a UK power cable be used with a US laptop power adapter?

I have a US MSI GE62 Apache -002 laptop, its power adapter is rated at: Input: 100-240V ~ 2.7A 50-60Hz Output: 19.5V - 7.7A Can I use it in the UK with a UK power cable?
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0answers
19 views

Computer stalling out during gaming and randomly restarting - I think its the power supply. New power supply's don't work?

ISSUE: I think my issue has multiple issues. 1 leads to 2 leads to 3... I think anyway. Are they related? That may be enough to answer my question. Issue 1 is what I attempted to answer, but the ...
0
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1answer
51 views

PC won't turn on

My new PC broke down completely yesterday. This was my first ever PC build, I installed the components myself, but I couldn't figure out the wiring/cables so I went off to a tech-guy for help. He put ...
0
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1answer
25 views

How to lessen performance impact on Dell laptop with defective power system?

A few months ago, I replaced a broken cord for my Dell Inpsiron 15 laptop. The replacement cord (a slightly different model from the factory cord) worked perfectly until a week ago, when I started ...
0
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1answer
62 views

Is keeping a laptop connected to power supply harmful for its battery? [duplicate]

I heard that charging a Li-Ion battery all the time is practically harmful for the battery and significantly reduces its useful capacity over time. Is this true? Should I disconnect the power cord ...
2
votes
1answer
36 views

Surge Protecter's Grounded Light Turning Off

I've got a new PC setup in a new apartment (built before 1980s), however the surge protector I have is doing some funny things. Any help would be appreciated. When I plug the surge protector into a ...
0
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1answer
30 views

Is it ok to use a Haswell CPU with old power supply?

I will buy a i7 4790k, and I want to know if I might encountered any problem using it with a old 250W power supply. I'm planing to get a new power supply also, but only when a I got my video card. ...
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2answers
122 views

Is it possible to apply a time frame to Windows 7 power settings?

The problem: I want my desktop computer to use the High Performance power mode whenever I'm at work, to minimize UI lag, etc. When I'm not at work, I want to enable Power Saver mode. I'd like to do ...
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0answers
33 views

Computer power supply fault

This is my first post to the site; it's been a great resource to me in both my professional and personal lives. It's about time I registered! So I went to boot up my desktop this morning and nothing ...
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0answers
26 views

Inspiron powers down at random

I have a Dell Inspiron 5348 that shuts down at random as if the plug is pulled. I ran the diagnostics and no fault was found. I have tried various power outlets in the building but that doesn't ...
0
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1answer
30 views

Overloaded UPS, might it have damaged connected hardware?

I have an APC Back-UPS ES 400, and during a brief power failure (less than a minute), its buzzer sounded continuously. Looking up the manual, this apparently indicates an overload. It's rated to 240W, ...
0
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0answers
58 views

External monitor flashes occassionally only while power cord is plugged-in

I have a Thinkpad laptop (E550 to be exact) with an i5 CPU and Intel HD 5500 GPU running with Win 7. Since two weeks, while an external monitor is connected (to the VGA port) AND the power cord is ...
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18 views

PC Won't Sustain Power

I've been using this system almost every day for the past 7 months. It has worked completely fine with no indication of error at all, but now it will not power on. Whether I use the casr button, the ...