39
votes
13answers
5k views

Is it safe to power on a motherboard outside of its case?

I have a new motherboard which needs a BIOS update to support a new CPU. Thankfully I have an old (compatible) CPU handy. My plan is to install the old CPU, update the BIOS, then install the new ...
0
votes
0answers
12 views

HDD Power Controller with API?

I just saw a new advertisement from Asrock. It said they created a "revolutionary" feature that their motherboards let users turn on/off HDD power (software-controllable). But this is basically what I ...
3
votes
1answer
126 views

How to draw 12W DC output from PC motherboard/PSU/USB?

I recently bought a Dell AX510 Soundbar speaker that fits snugly under my monitor. However, my monitor, Dell IN2030M is a budget model, and while it does have the plastic grooves to fit the ...
0
votes
0answers
22 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 ...
2
votes
2answers
111 views

Can using a under powered laptop charger make my notebook shut down under heavy load?

I have a XMG P501 gaming laptop based on Clevo P150HM models at the moment connected to an under powered laptop charger. It is shutting down when under heavy load (3dmark, some games in particular) ...
0
votes
0answers
9 views

Debugging power on issue

First off I don't know if this is the correct fora, for this kind of question. My personal Acer Aspire 5745G has an issue, namely that it usually has issues powering on. The issue is that when the ...
0
votes
0answers
52 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 ...
0
votes
0answers
36 views

What would cause a USB bus under current and how could it be corrected?

I have a new motherboard that is exhibiting a strange issue with the USB (2.0 only) bus. I am having some of my devices losing power and led lights start flicker when I am playing games and other ...
1
vote
1answer
55 views

Computer won't start back up. [duplicate]

I unplugged everything from my computer a couple of days ago because I had to move it. After half an hour later I plugged everything back but my computer wouldn't start. It's a HP desktop. Here are ...
1
vote
0answers
143 views

PC won't start unless I reset CMOS

Situation: My PC is dead in the water. Both power buttons (Case/MB) have no effect. If I pull the power cable, reset CMOS, reconnect the power cable, then press either power button the PC fires right ...
0
votes
0answers
104 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 ...
1
vote
1answer
99 views

Can I use two different PSU cables from the same brand?

I have an old rig and a new rig, the "old" one is using a previous generation AX850 (the ones with the gold writing on the side, not the red), and a new RM 850. I want to add a second graphics card ...
0
votes
0answers
65 views

Battery port/internal battery supply/motherboard problems in an Acer laptop?

I'm not exactly sure what one is wrong. I personally think that it's the charging port, but two different computer repair places have given me the following answers in the title. It's not my cord, ...
1
vote
1answer
46 views

Computer wont turn on immediately

Having an issue with my stack, I'll try to describe it as best I can. Was hoping for some advice from you kind people. I turn off my computer normally every time I shut it down, no programs running ...
0
votes
1answer
56 views

PC will not power on with normal power supply

My ASUS M2N-SLI motherboard would not turn back on after running fine for 5 years. Connected a new (still in the box) 430W power supply - ATX 2.1 - the system powers on. The power supply doesn't have ...
1
vote
2answers
124 views

How does the BIOS disable a controller on the motherboard?

What happens when you disable a controller in the BIOS? How does it stop the OS from picking it up when it scans the buses for devices. Does it stop power going to the controller, if so how does it ...
3
votes
1answer
92 views

Is my power supply dead?

I recently bought a new NZXT Phantom case and went ahead and moved all my components from the old case. It took a while to get some things in, and then to do a little bit of cable management (as much ...
1
vote
0answers
39 views

Resources and Advice Troubleshooting a Motherboard [closed]

I have a motherboard (I think it is a PM57 PCH Peak-M system board) on an HP ENVY 15-1066nr that I believe has a short. A few days back the laptop stopped charging (with or without the battery). I ...
0
votes
1answer
527 views

20+4 pin power supply to 24+4 pin motherboard [duplicate]

I'm thinking about making a small custom-build server. It would only use around 60W maximum. I don't want to pay too much so I think using an old power supply would work. The motherboard I'm ...
0
votes
0answers
48 views

notebook fails to start frequently but sometime it works great

-cpu and ram test and stress test pass when works -bios reset or load default setting didn't work -disconnecting every components and taking out mobo again no luck (only posts sometime) -no luck with ...
0
votes
0answers
103 views

Powering a pico-ITX board with a UPS board for long intervals

I'm putting together a project to make a DIY "Tablet PC" with readily-available products that I can put together and use with little soldering effort. I have the motherboard and a 10" touch screen ...
0
votes
1answer
198 views

I may have fried two completely different computers

I have two computers: my main one, and an older one. Currently, both are fully hooked up, and neither will respond when the power button is pressed or held. No fans, no lights, no sign at all. Prior ...
0
votes
1answer
97 views

Motherboard LED comes back on without PSU switched off

Wondering if anybody has experienced the following issue Shutdown Windows, PC shuts off, Motherboard Start LED remains lit Turn off Power via PSU rocker switch Motherboard LED takes 2-3 secs to ...
1
vote
1answer
6k views

Do I need to replace my CPU or Motherboard, PC not powering on

My PC will not power up at all, after thinking it was the PSU I replaced that to no resolve. When I try to power on the PC the CPU fan will move about 1mm and then nothing. I tried all sorts, but it ...
2
votes
3answers
272 views

Is my PSU failing or is it my motherboard?

Let me first start by saying that I searched for other questions that matched my situation and I wasn't able to find any. So, here's my issue: Sometimes, when I turn on my desktop, it does not ...
0
votes
0answers
343 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, ...
0
votes
0answers
256 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 ...
2
votes
1answer
258 views

Computer Randomly Crashes to Black Screen, sometimes fails to post

my computer started crashing to a completely black display where it would try and restart immediately. First it was happening during a game only and i thought it was some memory leak within the game ...
0
votes
0answers
961 views

Asus P8H61-M LX won't power up after clearing RTC

I used to have problems with my new Asus P8H61-M LX motherboard: the keyboard wouldn't work properly, I could not boot in windows, it took 3-4 computer boots to get an image on my screen (using the ...
0
votes
1answer
92 views

Dual socket with single CPU power connection

Is it harmful for a processor and/or motherboard if the motherboard is a dual socket motherboard, only one socket is filled with a (compatible) processor, but two processor power plugs are plugged ...
2
votes
1answer
193 views

Resurrecting an old computer. Powers on, does not boot

I have an old Dell Optiplex GX1 that I want to revive. If I plug it in, the power comes on. However, the power switch has no effect (can't turn it on or off, have to unplug it to stop power). I ...
0
votes
2answers
2k views

system starts without pressing power button after power supply switch on

My system starts without pressing power button after power supply switch on, after that it goes to bios. but there is no problem for restart or shutdown (i always should put power switch button on) ...
1
vote
0answers
130 views

New power supply won't start

I replaced my power supply with a new one. I connected all cable to the motherboard 24-pin and Molex, HDD and DVD power cable, then I started my PC and I used it for about one hour. After I shut ...
0
votes
1answer
179 views

No power, custom build with new parts, yet 850W PSU still works with old parts

I've just upgraded parts in my PC. was a few years old, built it myself then too. Got a new motherboard, RAM and processor. Connected everything and power lasted literally 1 second, then died and I ...
1
vote
3answers
3k views

PSU failing or Mainboard failing?

I am having some troubles lately powering on my desktop workstation. While starting up the PC after being off for hours (usually at least 8 hours) it randomly fails to do so. What happens is that : ...
0
votes
2answers
2k views

Computer will not turn on after replacing CPU, PSU, and motherboard

I recently replaced the PSU, motherboard, and CPU after my computer shut off randomly. Now when I try to turn it on, I get no response. I've tried: Taking out the RAM A CMOS reset Swapping out the ...
0
votes
2answers
16k views

How to plug power/reset buttons from case to motherboard leads?

I have a motherboard I salvaged from a pre-assembled computer. Except now I'm trying to use it in my own custom build. The problem is, this motherboard doesn't have any documentation because it was ...
-1
votes
1answer
88 views

Laptop DC voltage being changed

I got Toshiba Laptop, The voltage of Charger being changed when Plugin the Power, but When I checked the charger without plugin it shows correct Dc voltage and current by Digital Multimeter. Please ...
1
vote
1answer
373 views

My USB devices sometimes flicker on boot

I have a problem with a PC where the power sometimes acts up on boot. This PC has a mouse with back-lighting. The back-lighting on the mouse will 'sometimes' flicker and the PC will not accept any ...
1
vote
2answers
6k views

Asus P8P67 Rev. 3.1 Motherboard issues powering on and saving settings

Edit: New Information Have some updated information from the old question below: So basically my issue right now is somewhat similar, but I've been able to rule out a couple of things. I don't think ...
2
votes
1answer
661 views

Computer doesn’t power on when a video card is inserted [closed]

I have a computer (MSI 845PE Max mobo) that doesn’t start (fans don’t spin up) with a video card inserted in AGP slot (it does start when the AGP slot is empty). That didn’t happen yesterday. It ...
3
votes
1answer
2k views

Why does my computer not boot?

When I turn on my computer, it doesn't boot. It does not even give the single "beep" that it usually does while starting. It does not show the BIOS start screen, it does not start reading from the ...
1
vote
1answer
2k views

Where to plug in the PowerSwitch on an ASRock K7S41GX motherboard

I have an ASRock K7S41GX motherboard. I don't know where to plug in the power switch.
1
vote
1answer
132 views

Tracking a short

I was looking at a thread posted on earlier Laptop charger dying after plugging in? talking about a power issue with a laptop or the charger. I have done some testing and concluded that the short is ...
0
votes
1answer
531 views

Front Power Switch Never Worked - PM800-M2

We have one PC with a PM800-M2 motherboard on which the front panel power button is a no-op. It will neither start nor stop the system. System boots fine when PSU rocker switch is moved to 0 and back ...
0
votes
3answers
3k views

Replacing a Pegatron M2N78-LA MOBO with an ASUS M4A785-M MOBO connector issue for HP Pavillion a6702f

I am replacing the MOBO on a HP Pavillion a6702f and I have got to the point where the where the power button cable (white) needs to be attached as well as the cable for the card reader (black) on the ...
1
vote
2answers
189 views

Motherboard on, but nothing will start

I'll try and be as clear as possible. Recently I purchased a barebones kit for my first attempt at a full PC assembly. I've gone through and connected all the parts correctly based on numerous ...
1
vote
1answer
340 views

Why does my computer hesitate to turn on?

I just built my first computer, but every time I hit the power button everything goes on like it was starting up, then everything turns off for about 3 seconds, and then it turns on and stays on. Is ...
4
votes
3answers
807 views

Why won't my computer enter the boot sequence — even though the power is working?

Following a storm last night -- though without lightning or thunder -- my desktop won't start up. Symptoms: The external power lights and one internal light on the motherboard light up. The three ...
1
vote
0answers
776 views

Effects of enabling DVFS in a CPU

I came up with this energy regulating software called Granola while reading at Ghacks.net I downloaded and installed the software but you need to enable the DVFS function in the CPU. I booted up and ...