Question about ASUS P5LD2 Motherboard

1 Answer

Power supply Someone switched the toggle on the back of the power supply from 115 watts to 230 watts, I was told the pc had no power so I started trouble shooting. I seen the toggle switch on 230 so I put it on 115. Allthis was done while I was unplugged from my power source. I turned on,,or rather tried to. No power. I removed power supply and was ready to go buy a new one when I was told to move the switch to and from 115 -230 a couple times before I put it back in.I did. It powered up but no monitor. CDROM works,CDRW,FLOPPY,,all have power but monitor is BLACK. Whats wrong. Is the MB fried.

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert who has written 50 answers of more than 400 characters.


    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 167 Answers
Re: power supply

Usually this will damage the power supply only. To make sure your that your motherboard is working, try to find a working power supply unit and connect it. If it does not work your motherboard may be get damaged. Also check for warranty. If your system contains a graphics card, check that too, it may also get damaged with voltage variations.

Posted on Oct 03, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

Asrock conroe b65gv motherboard only working cpu fan.....

First thing to check with a desktop computer problem is the Power Supply.
This I state a lot.
In reality there's a flaw.........

In reality a person should visual check for bad capacitors on the motherboard, then move to the Power Supply.

The AsRock Conroe865GV uses nothing but Electrolytic Capacitors.
(Radial Aluminum Electrolytic Capacitors to be exact)
Doesn't use any Solid Polymer Capacitors.

These are known to be a 'weak link' on a motherboard.

Capacitors are used as Filters, and Voltage Regulators, on the motherboard.

The ones used as voltage regulators are in the Motherboard Voltage Regulator Circuit,

Just thought you might like to know

Since you indicate the CPU fan is spinning, I assume you know the computer isn't supposed to be dirty inside.
If you don't............we need to have a long talk..........

With a Power Supply having a weak voltage power rail, you may see LED's light, and maybe fan's spin, but there won't be enough power to turn the CPU (Processor) on.

1) If ALL of the LED's were on at once, they would use less than 1 Watt of power.

2) EACH fan uses 2 to 3 Watts of power.

3) A typical CPU (Processor) can use 51 to 130 Watts. Just depends on what CPU it is.

AsRock Conroe865GV?

The motherboard chipset is an Intel 865GV chipset,

Can support Intel Pentium 4 HT, models 620 through 672; for ->one.
They can use Up To 115 Watts,

[ AsRock Support states the Conroe865GV will support Intel Core 2 processors, but I don't believe it.

It isn't until you get to the Intel 945G, that Core2 support is picked up.
Just my 2 cents ]

High voltage AC electricity comes into the Power Supply, and is contained in it's metal case.
The AC voltage is converted into low DC Voltages.

3.3 Volts DC, 5 Volts DC, and 12 Volts DC.
In comparison two D cell flashlight batteries produce 3 Volts DC.

A multimeter is used to check the three voltages.
Need guidance with this post back in a Comment.

[An economical multimeter around here, can be purchased for around $5 to $12.
Available in a lot of stores. I have seen them on checkout aisle racks, of major discount stores ]

Use a KNOWN to be good, Compatible power supply for a test unit.
May be a working computer that is not being used, that you can Temporarily borrow it's power supply.

Let's start the diagnosis from here..........

Post back in a Comment


Apr 18, 2013 | Motherboards

1 Answer

Never boot when start up

That's because you have a Power Supply with a weak voltage power rail

How do I know this?

1) IF all of the LED lights were on at once, they would use less than 1 WATT of power.

2) EACH fan uses 2 to 3 Watts of power.

3) A typical Processor can use 51 to 125 Watts of power. Just depends on what processor it is.

Your motherboard?

With the LGA 1155 processor socket, and the Intel H61 Express chipset, it can support Intel Core i5, and Core i7 processors.
(That use an LGA1155 processor socket)

Information on the Intel H61 Express chipset,

List of Intel Core i5 processors, that use the LGA1155 processor socket,

95 Watts maximum (TDP) Also scroll down.

List of Intel Core i7 processors, that use the LGA1155 processor socket,

95 Watts M-A-X-I-M-U-M. (TDP = Thermal Design Point) Also scroll down.

What is happening?
You press the Power On button. This plastic button in turn, presses against the Power On switch. A Momentary Contact Switch.

The brief closing of the Power On switch, closes the Soft Power On circuit, in the Power Supply.
The Power Supply turns on.

The first chipset to receive power is the BIOS chipset. The BIOS program starts.

BIOS looks to see what devices are connected, does a Ram Memory count, TURNS the Processor on, and hands the computer over to the Operating System.
(Windows XP, and Windows 7, are two examples of an O/S)

When BIOS goes to turn the Processor on, the Power Supply 'falls flat on it's face'.

Has to enough power to light a few little LED lights, and maybe spin a fan, or two, but NOT enough power for the Processor.

The monitor is stating No Signal, because there is no video signal coming from the computer. This is because the computer is not working, because of that bad Power Supply.

[Weak voltage power rail ]

Want to know how to test the Power Supply?
Post back in a Comment.


Jun 20, 2012 | Intel Desktop Board DH61WW Classic Series...

1 Answer

Processor fan is very noisy from start up to all the time I am on line.


Good day , you may need to power-off her PC, open it up, and give it a good cleaning with a vacuum cleaner. If possible, after you've got her PC open, and before you clean it, turn it back on so you can figure out which fan is causing the noise problem (many PCs have more than one fan). If it's the CPU fan, then you're going to want someone who is comfortable and experienced with removing it and replacing it with a new one, because it is EXTREMELY important to get 100% physical contact between the CPU chip itself and the cooling fan/housing that is attached to it, or the CPU is going to overheat and destroy itself within seconds of being turned back on. If the noise turns out to be from a normal case cooling fan (3-5 inches across), you can try cleaning it really well to remove any dust, and see if that fixes the problem. If not, you can buy a replacement fan of the appropriate size at pretty much any PC store for $5-$20. It takes 5-10 minutes to unscrew the old fan and install the new one, and just use the same electric wire from the old fan for the new fan.
If the noise turns out to be from the computer's power supply, you cannot repair it, so it needs to be replaced. I would recommend either replacing it yourself, or having someone who has done it before replace it for you. There's usually only 4 screws that hold the entire power supply box in the case, and then you also have to unplug the power cords that go from the power supply to the hard drives, floppy drive, CD drive, other internal peripherals, motherboard, and fans. Carefully remove the entire power supply box from the PC case, being careful to not scrape it or bang it against any of the memory cards or other internal components. Take the noisy power supply with you to a discount computer store and find a new power supply that's the same physical size and at least as many watts as the current one (usually 350-500 watts). If you go with a generic power supply, it will probably cost around $30. If you go with a name brand, high-wattage power supply, it can cost $100 or more. Hope this information help you in resolving your issue. Have a great day.

May 23, 2011 | Motherboards

1 Answer

Is there more than one power switch on my dell inspiron 531S? I was working on my computer and then suddenly poof! No signs of life. Monitor working but no computer. I have tried checking power surge...

Hi, Thanks for using fixya.

Check the 230/115 switch if it is on the right voltage then I would change the power supply. Sounds scary but very easy to do. They run as cheap as 10-20 bux.


Feb 12, 2011 | Motherboards

1 Answer

PC won't boot after upgrading cpu

either you have bought an incompatable chip for the mother board. or your power supplie is not powerfull enough I know this sounds stupid but it happened to me when I upgraded to a P4 3.6 quad core I installed the lot and it wouldnt start up I had a good power supply too Get your self at least a 500 watt PSU

Hope this helps

Apr 20, 2010 | VIA P4MA Pro Motherboard

1 Answer

I'm connecting everything but the motherboard does want to start

Some power-supplies have a rocker-switch, with a '|' and an 'O' icon, which acts as a "master" power-switch. Be sure that you have pushed down on the '|' side of the rocker. As you do so, look at the motherboard -- it may have a small green lamp on it, to indicate that the motherboard is receiving power from the power-supply. Also, look at the fans -- they may slightly "rock" (twist back and forth) for a moment as you move the switch.

Most of the connections to the front-panel can be ignored while "trouble-shooting" your problem. As long as the two "power" pins on the motherboard are connected to the "power" button on the front panel, pressing the "power" button should work as expected.

Oct 26, 2009 | Asrock AM2NF6G-VSTA Motherboard

2 Answers

Asus a8v-vm se fans always run

Hi jderek4, try this. locate the toggle switch on the back of the power supply. Just find it do not flip it.
Plug the PSU's power cord into the PC. Just as you got a good connection & the PC begains to power up move the toggle switch to it's other position. The PC should power off that very second.
If the PC does not shut off than the PSU is bad. If it did shut down wait a few seconds. Press the cases power on button. The PC should start to boot up. Let it finish loading. Click the start button & choose to shut down windows. The PC should shut off.
Yes? If not than your back to (bad power supply). Swap it out.


Mar 29, 2008 | ASUS A8V-VM Motherboard

1 Answer

Wont post.

Try a few things for me OK? From what you typed, turned on the psu "the toggle switch on the psu", pc seemed to be starting up. I need you to keep the toggle switch on the power supply in the on position. Press and hold the start button on the PC case to shut it down. Give it a few seconds & power up by pressing the power switch on the case. Notice a differance? Next, unplug everything connected to the pc expect the monitor, mouse & keyboard. Try to boot. Still no? Remove the side of the case exposing the board. Turn the psu off by flipping the toggle switch on the psu, wait till the green light on the board goes out. Grab the Mb ( I know it's tight in there) and see if you can move the board in any direction. Not loose? Re-check all data & power connections for a solid connect. Re-check your case to Mb connections. Also check the PSU, there is a red slide switch it should be set to 115v. Post your findings..

Jan 28, 2008 | ASUS P5ND2-SLI Deluxe Motherboard

Not finding what you are looking for?
ASUS P5LD2 Motherboard Logo

Related Topics:

68 people viewed this question

Ask a Question

Usually answered in minutes!

Top ASUS Motherboards Experts

Brian Sullivan
Brian Sullivan

Level 3 Expert

27725 Answers

Sudeep Chatterjee
Sudeep Chatterjee

Level 3 Expert

3267 Answers


Level 3 Expert

2598 Answers

Are you an ASUS Motherboard Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides