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TToma6
Beginner
899 Views

Working of Power LED for DQ77MK Main Board

 

I bough DQ77MK Main Board for Industrial Work Station.

when i turn on, the front power LED was not on.

LED was connected to alternate front panel power/sleep LED header.

I already try to change the direction + and -, but still not work.

When i check the voltage level for LED header, the value is 1.8 VDC.

which component has wrong? is it on LED or Mainboard?

could you please advice to me how to do?

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2 Replies
AlHill
Super User
18 Views

Please refer to section 2.2.2.4 on page 60, table 30, pin 2 and pin 4 for the front panel POWER LED, and section 2.2.2.4.3.

For the alternate front panel power LED, refer to section 2.2.2.4.5.

For the location ot the front panel header, refer to section 2.2.2, page 51, figure 11, location R, and location Q for the alternate.

http://downloadmirror.intel.com/21340/eng/dq77mk_TechProdSpec04.pdf http://downloadmirror.intel.com/21340/eng/dq77mk_TechProdSpec04.pdf

1.8v sounds correct for the LED voltage. If your current LED does not work when correctly connected to the primary or alternater header, I would try another LED.

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idata
Community Manager
18 Views

Hi TomasKim,

 

 

I am following up on your case. Let me know how it goes.

 

 

Regards,

 

Mike C