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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6
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1answer
825 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
votes
1answer
244 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
votes
1answer
37 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 ...
0
votes
0answers
35 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 ...
0
votes
1answer
20 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). ...
0
votes
1answer
37 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 ...
3
votes
1answer
235 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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votes
1answer
48 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 ...
1
vote
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 ...
0
votes
2answers
37 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
votes
1answer
144 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 ...
0
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0answers
50 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 ...
0
votes
2answers
84 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
votes
1answer
117 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 ...
0
votes
1answer
106 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
votes
0answers
75 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
votes
1answer
92 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
votes
0answers
66 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 ...
0
votes
0answers
48 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: ...
1
vote
1answer
25 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?
0
votes
0answers
28 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
votes
1answer
113 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
votes
1answer
40 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
votes
1answer
95 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
101 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
votes
1answer
66 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. ...
1
vote
2answers
137 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 ...
0
votes
0answers
57 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 ...
0
votes
0answers
32 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
votes
1answer
52 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
votes
1answer
338 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 ...
1
vote
0answers
28 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 ...
0
votes
2answers
86 views

Why are my drives failling (version 2)?

I have a problem similar to the one described on question Why are my hard drives failing?. I have a PC assembled by my self and It has worked fine for 3 years but recently It have been killing hard ...
0
votes
0answers
6 views

HP Prolian BL460C power supply converter

I have 3 HP Prolian BL460C servers, but I don't have chassis for them. Is there any kind of power adapter that I can use for, so I can just use normal power cable to plugin? It's not for production, ...
-1
votes
2answers
327 views

Toshiba laptop power light turns off when power button is pressed and the computer doesnt power on

I have a toshiba C655 laptop, As soon as I plug in the adapter the laptop power light turns on with or without the battery, but when I click the power button the power light goes off and nothing ...
1
vote
1answer
138 views

I'm in the US and computer only works when power supply is in 230V position. How do I diagnose this?

So, I replaced a computer PSU about six months ago. And, the computer power down intermittently. I've found: it's not over heating. Monitor shows it running cool. it's not graphics related. ...
1
vote
1answer
44 views

Squealing coming from laptop power supply? [duplicate]

I have an HP Pavilion dv7-6135dx. This morning, the power supply/AC adapter started making squealing noises for a few seconds at a time. I had it plugged in during a storm that happened while I was ...
0
votes
1answer
73 views

Computer Don't start - Changed MOBO , PSU , VGA , RAM

I have an ASUS P5W DH DELUXE with Core 2 Duo E6400 and 1GB x 4 ADATA RAM The computer failed to start and started troubleshooting. I changed the PSU (bought 3 of them) [1x450Watt , 1x500Watt , ...
0
votes
0answers
49 views

I disconnected my PC for a clean up, and now the screen is not working

I disconnected my PC for a clean up, and also to change The DVD reader. I trusted myself that i would remember how to connect everything to the motherboard again, but, something is not working well: ...
0
votes
0answers
47 views

Computer making various noises and sometimes runs slowly

My computer has been making some very strange noises for several months now. The first noise it made was when I installed Speed Fan and after the second time of running the program, my computer made a ...
2
votes
1answer
296 views

Brand new computer fails to boot, powers on and off immediately, despite running fine while installing OS

I've exhausted Google search in attempt to solve my issue, and I'm fairly confident there's no single solution but I'd like to get some brand new ideas. The specs: ASUS X99 Sabertooth 8x8GB G.Skill ...
1
vote
2answers
197 views

Can my PC handle a Nividia GTX 750 Ti? [closed]

I am willing to update my graphics card to Nividia GTX 750 Ti but I am confused about the power supply and the motherboard if they can support it or not. Motherboard System Manufacture: Gigabyte ...
0
votes
0answers
40 views

PC doesn't boot most of the time

PC is now dismantled down to: motherboard (Asus Z97AR) CPU (Core i7) PSU (750W) Motherboard and CPU are new, PSU is old. If you continuously turn the power on, then of, then on again, ...
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vote
0answers
122 views

Computer randomly loses signal to monitor

Around a month ago I build my first computer, and I've had no problems until now. For about a week my computer has lost signal to the monitor, is only able to be turned off from the PSU. (The fans ...
1
vote
0answers
48 views

Power supply needed? can I use the same size because old one is near end of life or do I need a larger one [closed]

Symptoms, my computer when it gets going the power will just cut, the power indicator stays lit but everything else dies, all the fans, the screens go dead it does not respond on the network (ssh ...
0
votes
1answer
56 views

System keeps changing power mode while gaming

Recently my laptop keeps changing power mode while gaming, like if i disconnected the charger physically. I don't have another charger to test, this is the stock one which has been running fine for 3 ...
0
votes
0answers
1k views

PSU fan (power supply fan) not spinning. But computer works

The PSU fan on my computer is not spinning at all. I've now run a high def video for 20 mins and it's still not spinning at all. I read there's power saving features that will power down the fan, but ...
0
votes
1answer
71 views

Screen pitch black after random shudown, Gpu's fans full speed.

This morning I went to power up my pc and BAM. My screen is pitch black. Noticed that Gpu's fans were at full speed. Switched to my moba gpu and well, it works fine. I cant understand if it's a GPU ...
0
votes
0answers
23 views

computer lights up but then nothing

my computer was working fine today morning. then when i switchced it on in the evening nothing..the led near the lights up but thats its not beep sound or anything. even the fans on the PSU and ...
1
vote
1answer
502 views

What PSU sizes can I use with a 2U server chassis?

Note that this question is not a hardware recommendation. The actual PSU and server case quoted in this question are given merely as an illustration; the question itself, as it was explicitly ...