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ASUS Motherboard Startup problem. Computer will not start. When switched on, LED on CD/DVD Drive flashes rapidly a number of times and loudspeaker emits one long beep followed immediately by three short beeps. Monitor screen remains dark throuhhout. Computer will not start.

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  • buddhadessie Nov 06, 2008

    Many thanks mdsaee67. A check of the RAM is scheduled for next week. Will advisw result.

    buddhadessie

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  • Master
  • 849 Answers

Beeb shows that the memory RAM gone out of order/dislocated, check it.

Posted on Nov 05, 2008

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Cant find my motherboard pin out


http://www.pcmag.com/article2/0,2817,2388344,00.asp?tab=Specs

With all due respect, you have the manual in front of you now

That is unless you started unplugging wires already, and didn't make notes, drawings, or take photos.

Let's use the Asus Essentio CM1630 motherboard for an example.
Couldn't find a CM1730, but that's OK. We'll use this one for a general example,

http://www.ebay.com/itm/OEM-ASUS-ESSENTIO-CM1630-MOTHERBOARD-61-MIBBJ5-01-TESTED-/181007679725?pt=Motherboards&hash=item2a24e600ed

Put your mouse cursor in the middle. Now move your mouse around, using the Zoom In feature.

If this motherboard were mounted in a computer case, it would be turned 90 degrees to the Right.
Bear that in mind.

The front of your computer is the Front Panel.
The area of contact pins on the motherboard, that the Main wires from the Front Panel go to, is the Front Panel header.
Goes by many abbreviated names.
PNL 1, FP1, PANEL1, etc.
(Panel 1, Front Panel 1, Panel 1)

Go to the Top/Right corner of the motherboard photo. To the 6 Blue SATA connectors.
Immediately to the bottom of them, is a white Front Panel header.
Two rows of contact pins sticking up.

You need to make notes, drawings, photo, whatever; of where the wires from the Front Panel, go to each one of those pins.
(Some may not be used)

How to know which wires coming from the Front Panel, are the Power On switch wires, Power On LED light wires, HarDDrive activity LED light wires?

Remove the Front Panel from the computer. If it is Not just a cover, EASE it off just enough to look behind it.

You usually can follow the Harddrive activity LED wires.
Harddrive activity LED is usually AWAY from the Power On switch, and Power On LED light.

There's two wires down.
Now look at where the Power On LED light is. Can you see wires going straight to it?
Two more wires down.

From process of elimination, you now know the last two wires going to the Front Panel, are for the Power On switch.

(The Power On switch, is part of the plastic Power On Button assembly. If you look close at the Power On Button assembly, you can see this)

THAT sir, is the MAIN thing.
I can guide you where the other cables go, as far as power cables, and Harddrive cables, and Optical Drive cables. (CD/DVD drive)

If you have already disconnected the Front Panel wires to Front Panel header on motherboard; you get to play a game(?)

Power Supply plugged into power, use a small flat tipped screwdriver, and touch two pins at a time.
When you get to the two Power On switch wire pins, the Power Supply will come on.

Now it is a process of elimination.
Use an LED with two wires, to find out what the rest of the pins are.
The rest of the contact pins in the Front Panel header.
Grab the HDD LED light, or Power On LED light.
You're getting a new computer case anyway.

Touch two pins, and the LED light blinks?
That's the HarDDrive activity LED light, pins.
LED stays on?
That's the Power On LED light, pins.

Either of those LED's are dim, (When the Harddrive is active, or when the computer is on), switch the wires around.
You have the Positive ( + ) wire mixed up with the Ground ( - ) wire.

Moving on.............
The 6 Blue SATA connectors on the motherboard:
If you look close you will see;
SATA0, SATA1, SATA2, SATA3, SATA4, and SATA5.
Or it may be,
SATA1, SATA2, SATA3, SATA4, SATA5, and SATA6.

The Harddrive plugs into SATA0 or SATA1.
Just depends on what the SATA connector numbering starts with.

The main optical drive, or a single optical drive; plugs into SATA1, or SATA2.
A secondary SATA optical drive will plug into SATA2 or SATA3.

(Look at the SATA numbering above, and you can compare side, by side )

HOWEVER, the beauty of SATA is; that you can plug whatever you want to, in ANY SATA connector on the motherboard; and BIOS will find it.

Plug the Harddrive into SATA 3? No problem.
Plug the optical drive into SATA 0? No problem.
BIOS will find the drive with the Operating System on it.
The Harddrive.
Then BIOS will know the other drive/s are optical drives.

(Make sure in the BIOS Setup utility, that the SATA connector on the motherboard you are using, is Enabled.
Otherwise BIOS will Not see the drive)

What cable from the Harddrive, and optical drive; plugs into those SATA connectors on the motherboard?
A SATA data cable,

http://en.wikipedia.org/wiki/File:SATA_ports.jpg

Note the L-shaped opening in the SATA data cable connector.
Lines up with an L-shape on the motherboard connector.
One example of a SATA connector on the motherboard is shown.
This one is an Open design. Your SATA connectors on the motherboard, will be a Closed design.

Between a SATA data cable connector, and a SATA power cable connector, the SATA power cable connector is larger in width.
SATA data cable connector has 7-pins.
SATA power cable connector has 15-pins,

http://www.playtool.com/pages/psuconnectors/connectors.html#sata

See the SATA harddrive example?
Note the L-shape is pointing DOWN. It is this way EVERY time.
Now you know which way to turn the SATA data cable's connector, when installing. 'Foot' of L-shape goes Down.

More in a Comment.

Mar 14, 2013 | Computers & Internet

1 Answer

Asus AT3NT A-1 motherboard. after plugging in the power supply green LED comes on ok. switch on computer DVD drive LED flashes on as normal, CPU fan comes on as normal, it all seems ok, but no Video...


May be your RAMs are faulty. Or your VGA is faulty.
Remove RAMs and clean the RAM slot. Re-insert the RAMS. Restart the computer and check.
If it doesn't work, replace RAMs and see.

Sep 11, 2011 | ASUS AT3N7A-I Atom Dual-Core 1.6GHz/...

1 Answer

My Asus P5B-E wont start. I have power led blinking after i turn on power on and computer is just blinking and making sound like he is starting but can't. First time this hapens i took 15 minutes and...


this can be caused by a number of reasons

Test your PSU or replace it if your power supply units fan is not working your PSU is faulty

One bad lead can cause a computer to continue on a cycle or to shutdown or fail to detect/ boot up a computer hard drive

Test all leads that attach to your hard drive including electrical extensions,IDE,SATA

the leads from your "((MOTHERBOARD TO YOUR HARD DRIVE))" make sure they have a secure connection and are not faulty or just replace them they could be faulty
make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty even the electrical extensions or just replace them they could be faulty a computer needs its connections to continue its cycle and have an end so any faulty leads will end up with a computer error even something as small as a faulty electrical extension or fan lead can cause this problem

computers need all of the data and electrical current to travel through every working device and to have an end to be able work properly

a motherboard and a hard drive any leads between them will fail before your motherboard or your hard drive if its a flat ribbon 40 pin type IDE replace it this will be the first to fail check all electrical power input and extensions make sure they are securely seated even the cd/dvd floppy drives need to have current go through make sure these drives are working

also check the Cmos battery and computer ram make sure they are securely seated with no dust built up or in the sockets

hope this helps you

Aug 04, 2011 | ASUS P5B-E Motherboard

1 Answer

ASUS DSBF-D Dead, no startup, fans dead, just 1 green led on MB.


Test your PSU or replace it if your power supply units fan is not working your PSU is faulty

One bad lead can cause a computer to continue on a cycle or to shutdown or fail to detect/ boot up a computer hard drive

Test all leads that attach to your hard drive including electrical extensions,IDE,SATA

the leads from your "((MOTHERBOARD TO YOUR HARD DRIVE))" make sure they have a secure connection and are not faulty or just replace them they could be faulty
make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty even the electrical extensions or just replace them they could be faulty a computer needs its connections to continue its cycle and have an end so any faulty leads will end up with a computer error even something as small as a faulty electrical extension or fan lead can cause this problem

follow the troubleshooting procedure a computer needs all of the data and electrical current to travel through every working device and to have an end to be able work properly

a motherboard and a hard drive any leads between them will fail before your motherboard or your hard drive if its a flat ribbon 40 pin type IDE replace it this will be the first to fail check all electrical power input and extensions make sure they are securely seated even the cd/dvd floppy drives need to have current go through make sure these drives are working

hope this helps

Jul 18, 2011 | ASUS DSBF-D/SAS Motherboard

1 Answer

Just installed windows 7 with an external cd/dvd and now it will only boot with the cd/dvd attached. otherwise a black screen appears with the cursor in the top left corner.


when it boots to a flashing cursor in the top left corner and everything else it working, this means that it is NOT finding the operating system on the hard drive, many times due to boot sector issues.
Make sure you set your hard drive to main or first startup device.

Jun 05, 2010 | ASUS Eee PC 900 PC Notebook

1 Answer

Asus mobo flashes on startup, no video


You should unplug the power cord from the power supply, pop out the cmos battery, switch the bios reset jumper to the 2 and 3 pins, wait about a minute, put the jumper back to 1 and 2 pins, put cmos battery back in, plug in power cord to psu and turn on pc. If you have any issues with this process please refer to your owner manual for the motherboard or look one up on their website. Please let me know if this fixes your issue.

Apr 30, 2010 | ASUS M4A77TD Motherboard

1 Answer

Hi, my problem on dell inspiron 1526 is this: SYSTEM MODULAR BAY cannot be indentified.... problem is that CD/dvd drive show signs of work(when i turn my computer on Green led blinks,motor starts to rotate...


If the drive functions in another system the the issue is either the motherboard contacts or the controller. Flash the BIOS to the most current version and reset the BIOS defaults. If the drive still doesn't detect, then a motherboard replacement is likely in order.

Nov 15, 2009 | Dell Inspiron 1526 Laptop

1 Answer

New ASUS A8V-MX motherboard will not boot to CD or HD with XP


The first thing is to make sure that your CD/DVD drive has the windows disk in it. Also check drive C which is where the windows will be installed. It may require that it is hard formated. Hard formatted means "format x /u" [format-space-drive to be formatted-space-right slash-u]. This will place the drive for "windows xp sp2", all of it, to one pass of zeroes. So, once we have a clean drive C and the installation disc is inserted into the CD/DVD drive, you may proceed to install. You will need to find "install" or "setup" and start it on he "RUN" mode. Any questions or help get back to me. CONSTANTIN (arzconst)

Jun 03, 2009 | ASUS K8V-MX Motherboard

2 Answers

Asus 845 chipset pb4 mother board not starting


it may be the circuit problem,inside the mother board.send it to service center

Jan 16, 2009 | ASUS Intel 845 Chipset P4B (P4B WOA)...

1 Answer

Four Beeps on startup on a Panasonic uj-810b


sounds like it's trying to boot to the dead drive- pay attention to the screen when you power on F12 or F1 whatever get's you to boot menu- change the order to exclude the broken drive- it should stop beeping.

Jan 14, 2008 | Panasonic (UJ-825-B) DVD±RW Burner

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