Intel DH67BL Motherboard Issue

Edward Cullen · 29 May 2012

carwiz said:

I guess I'm dumber than I sound but just so we're on the same page, a UPS is an Uninterpretable Power Supply and has a battery (or batteries) that will automatically transfer the load to an internal inverter should the line supply voltage go below a predetermined voltage. I am NOT talking about a PC power supply. You said you're having the problem when you are turning on the UPS. If you turned it on, it must have been off at some point.

If you are referring to the PC power supply then please so state but that is not called a UPS.

In any case, it sounds like the PC power button is faulty, if you've checked everything else. Does the PC startup on it's own with the power button leads disconnected?

well bro i tried it with other cabinet and its still powering on automatically without pressing power button of cabinet and second thing i have tried it without ups and connected it directly to switch board now when i switch on cpu started automatically without pressing the power button of cabinet u didnt need to explain me the ful form and how it works of UPS lol (everytihng is available on google search

)

carwiz · 29 May 2012

I can only assume you are talking about swapping the motherboard and boot disk to another cabinet so lets look at something else.
Go into the BIOS on the next power-up by pressing F2 when you see the Intel logo at boot.
Use the arrow keys and move to the Power tab along the top, Press enter.
Find "After Power Failure" and set it's option to "Stay Off".
Press F10 to save and exit. Confirm (y=yes) if necessary.

Let Windows come up and finish it's housekeeping--Maybe five minutes or so.
Click Start and select Shutdown. Does the PC stay off?

Edward Cullen · 30 May 2012

carwiz said:

I can only assume you are talking about swapping the motherboard and boot disk to another cabinet so lets look at something else.
Go into the BIOS on the next power-up by pressing F2 when you see the Intel logo at boot.
Use the arrow keys and move to the Power tab along the top, Press enter.
Find "After Power Failure" and set it's option to "Stay Off".
Press F10 to save and exit. Confirm (y=yes) if necessary.

Let Windows come up and finish it's housekeeping--Maybe five minutes or so.
Click Start and select Shutdown. Does the PC stay off?

tht option is already set in bios i checked it....pls tell me can there be a problem with my motherboard ?? i mean does MB gives this kind of problem ?? so i throw it back to service center and ask him to change it again

TVeblen · 30 May 2012

It sounds like you have isolated it to the motherboard.
If the behavior occurs in two different computer cases (cabinet) then you can assume the computer case power switch is not the problem.

The PC turns on by a simple logic circuit. The board checks to see if it is getting power in all the right voltages and reports 'ready'. Modern boards have a green light to confirm ready visually.

Once 'ready' the computer is then started by a simple contact switch - exactly like touching two wires together. This switch does not need constant contact. Just a quick contact will activate the logic circuit and start the computer. That is all the switch on your case does: touches two wires together for a brief second.

On the motherboard the case switch is connected to a 'header' marked 'switch' with a 2-wire plug. You can actually start a PC without the case switch attached by just touching the 2 pins on the switch header with a screwdriver.

So why the long explanation? Your symptoms sound a lot like a short of some kind in that switch circuit. The board is receiving the "switch on" signal the minute it confirms power.

As you read above it would not take much. You want to carefully inspect those header connections to be sure there is not dust, hair, or something else bridging the two switch contacts.

Also, check you switch connection. Is the plug on the correct 2 pins? There has never been an issue with polarity with case switches, so that may not be an issue, but you might flip the plug around anyway just to be sure.

If you can't find a physical cause for the short circuit then you must assume the defect is in the motherboard circuitry.

Hope that helps.

TVeblen · 30 May 2012

Also:
Check to be sure that you have installed all of the correct standoffs for your motherboard in the case. Check your motherboard manual for the required positions.

Some people leave some standoffs out. This can cause strange problems because the MB designers look to those standoffs for earth ground for the system. A standoff in the wrong place can short circuit the system, a missing standoff can leave an open circuit.

Edward Cullen · 30 May 2012

TVeblen said:

Also:
Check to be sure that you have installed all of the correct standoffs for your motherboard in the case. Check your motherboard manual for the required positions.

Some people leave some standoffs out. This can cause strange problems because the MB designers look to those standoffs for earth ground for the system. A standoff in the wrong place can short circuit the system, a missing standoff can leave an open circuit.

why this problem happening after replacing mb old mb was working fine since i buyied ?

TVeblen · 30 May 2012

Because problems with the standoffs are only likely to occur when you replace or install a MB.

Edward Cullen · 05 Jun 2012

well well i cant believe this they sended me a damaged motherboard as a replacement from my 1st mb thts why my mb was restarting so i asked them to change it and they said tht warranty is over and they cant replace the mb and i have to get it repaired it

how cheap and bad company is intel

carwiz · 05 Jun 2012

I can't believe the warranty is over. It should be for three years and the board came out in January, 2011. That's when I got mine. Perhaps it's different in other countries or you didn't buy the retail version. Also, damage by improper installation is not covered. They would have sent your board back to you not another damaged board.

I wouldn't call Intel cheap because they won't replace the board. It's a business. If you wrecked your car, would you expect GM, Ford or Chrysler (or whoever) to give you a new one? I think not. Damage caused by the user is rarely, if ever, covered by warranty.

Here's the warranty: http://download.intel.com/support/mo...09_english.pdf

salman79 · 26 Jul 2012

Enter the BIOS and Set the Wake On LAN From S4/S5 <Stay-Off> .
I did this on my system which was doing the same as you mentioned above and my system works fine. now i power on my system pressing the power button.

Let me know if this works for you as well.