MS-7860 Motherboard PB/LED (P5) header pinout

[eMark]

Does someone know where I can get the pinout for the 10 pin header called "PB/LED" labeled P5 (connector) on the MS-7860 Ver 1.2. (Pro 400 G1 MT)? I have seen manuals that avoid that connector. Note the "missing or key" pin is exactly in the middle (pin #6).

I have seen many diagrams with the key or missing pin at one end. That is not my board. This is where the cable containing the power switch (not to be confused with power supply) meets the Motherboard.

I am replacing a failed Motherboard (three Months out of new Warranty with no physical indications of damage) with an ASRock H97M Pro4. I has every other connector perfectly wired. The only one I will have to "convert" is P5 (on the very outside edge of the SATA port corner). Thank you for your help.

[wb2001]

Replacing with NON-HP motherboard voids the OEM license for Windows.  That will be another setback for you. Been a long time since that pinout question was made.  Do these help?

[eMark]

I appreciate your quick response. Unfortunately that pinout is not my board. On mine the blank pin is at the 6 position. This one has it at 10. Also I think the two that make up the power switch are 8 and 10.

And thanks for the warning about Windows 10 license. I'm sure I can call Microsoft and get that fixed. I've done that for customers even since Windows 10 and they are always very helpful.

I didn't want to but I am just going to have to break out my continuity meter and tace the pinout. Strange that only my Motherboard has that pinout missing? I've found it for many others.

[eMark · Accepted solution]

Just pinned it out (the hard way). For anyone else that might have this Motherboard. Here is the correct pinout:

(1)HDD LED+      (3)HDD LED-       (5)Pwr switch  (7)Pwr switch  (9) n/c   

(2) Power LED+ (4) Power LED-  (6) blank            (8) jump          (10) jump  

                                                                                                             \________/

n/c    (has a hole with no wire)      

blank  (has hole covered)  The key so you can't plug it in wrong.

Caution!  Pins 8 and 10 are a jumper or "dead short" (maybe a "case tamper" switch bypassed?)  

I recommend you cut the jumper as it probably won't be needed on your generic replacement Motherboard!

Colors (may vary)

HDD LED+(1)=(green)   Power LED+(2)=(red)   HDD LED-(3) =(white)   

Power LED- (4)=(black) Power switch(5,7) =(both white) jumper to cut(8,10)=(black)     

The two "Power LED" (whites) are interchangeable but the HDD LED- (white) is not so be careful here 

and the jumper to be cut (removed) is black and should not be confused with the Power LED- 

I apologize if I gave too much info here, but it might be helpful for a novice in computer wiring..

[eMark]

One clarification. The view is from the female connector.. (or the bottom side of the Motherboard. If you look down on the Motherboard from the top here is the view..

(9) n/c    (7)Pwr Sw  (5)Pwr Sw (3)HDD LED-    (1)HDD LED+     

(10) jmp  (8) jmp   (6) blank    (4) Power LED-  (2) Power LED+ 

  \________/

[wb2001]

Thank you for the excellent reply.  I will save the header layout for future help on that series.

[Marvinator]

Ignore this....miss posted. 

[GregSSS]

Is it possible to connect reset to original HP ProDesk 600 G1 motherboard? Would it br jmp jmp pins? Thanks

[Claw84]

Hi Emark

i have the same motherboard as you - 6 is the blank- I think I found you lost to late and short out my PSU as a result - my pc won’t turn on have the light come on when I push the power switch and the motherboard light is green.  Is there anyway you post a picture hand drawn would be better of the way you set it up just so I can be sure? 
im just thinking about getting a new motherboard too lol but still want to try and fix this. Even the cpu fan is not replaceable as the abnormal bracket configuration. I found some 3mm nuts to hold down the existing Bracket to the cpu fan these sit under neath the motherboard which I will install if I can pc to power up. Ain’t a pretty machine. Shame because it’s quite powerful . I got 16gb ram and a 1060 6b gpu . Just hate the case and need more ventilation- any help appreciated with the PB LED switch configuration. Thanks 

[eMark]

In response to your request,

Is there anyway you post a picture hand drawn would be better of the way you set it up just so I can be sure? 

Here is a crudely drawn example. (I'm no Picasso..) 🙂