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The motherboard manual will give you a breakdown of the cast-to-motherboard connections for the board. They differ slightly from board to board, but the connections are almost always found at the bottom front corner of the motherboard. There will be connections for the hard drive LED, the power LED, the power switch, the reset switch, and on some, the speaker (optional). The power switch and the reset switch connectors , 2-pin plugs, are not polarized, meaning that they can be connected to their pins either way without issue. The Power and HDD LED plugs are polarized, as LEDs have a positive and negative. Get this plug backward and the LED won't work. These are also 2-pin plugs. The power LED usually has a green and white wire (Green is +) and the HDD is usually red and white (Red is +) . Some motherboards have color-coded pins -- DO NOT TRUST THEM IF YOU DON'T HAVE A MANUAL -- they are not always standardized. Some motherboards have small print on the board adjacent to the pins to identify them. You CAN trust these. Otherwise, go to the Motherboard manufacturers site and get the manual for the board. The model number is on the board and can be searched for. If the manufacturer's name is not obvious, Google the model number and it will usually lead you to the manufacturer.
Hi there, first check the image below. You've got USB 3 and 4, and AUDIO section. For the USB, pins 1 and 2 represent front panel USB power on both 3 and 4. As for AUDIO connection, pin 1 is Front Panel Microphone input signal, pin 3 is Microphone Power, pins 5 and 6 are for Right Channel audio signal to Front Panel and pins 9 and 10 are for Left Channel audio signal to Front Panel.
Next to the battery you have a connector like this:
line 1 for 1st front-panel usb, line 2 for 2nd. there comes 4 wires from a single usb. take a set of four wires and plug them in in this order: (from left to right) Red white green black. Connect other wires to same order to line 2.
there is no chance to join differport to join in computer asmbaling. we should look port and size and conneting corner shape. we can asambling any port reading in bords smallptints and casing wire there is aprint in casing wire /reset/ p.led/hddled/ usb u can get front usb print in mother bord,
The header plug is 9 pins, 5 on one side and 4 on other. Orient the header so that the missing pin is lower right and the connection left to right on top row and lower row are as follows. If you have a shield wire, do not connect this as it causes instability if the ninth pin is earthed. If you have no markings on the wires, you can test from the socket. Orient with the pins up looking from front socket and left to right is 1,2,3,4 same as header.
Pin Wire Color Function 1 Red V BUS (+5V) 2 White D- 3 Green D+ 4 Black Ground
First of all these wires don't supply power to HDD. These wires are for indicator LEDs on the front
panel of the cabinet. One wire `power sw' is to switch on the system from the power button on front panel. `power led' wire is of the power led on the front panel. All these wires will be connected to the cluster of pins on one corner of the mother board. If you can see it will be indicated & printed near the cluster of pins on the mbd, that which pair of pins is meant for what connector. Try to correlate the names on connector with the print on the mbd.
The USB header on the MOBO is an 8 or 10 pin in a 2X4 or 2X5 orientation. there will be one pin missing, that is not unusual. the plug will have the same socket filled. Most MOBOs have multiple USB headers on it and they are almost aleays labeled USB2 or whatever number.
front USB ports are an extension of a header on the mainboard, it connects via a bunch on individual pins, if any of these pins are wrong the front USB will not work, but usually this would lock up all USB and the ones on the back will not work either, i would suggest the front USB panel was either not connected at all, or it was conected wrong, usual USB header colors of wores is BLACK, GREEN, WHITE, RED, note all mainboards are different, so the black could start from either side of the header, b sure to refer to your motherboards manual for exact pin loactions on the header
Normally front USB ports have a pair of 4 wire cable with connectors marked red wire is vcc; white wire is -D; green wire is +D; and black wire is gnd. The motherboard would normally have two pairs of dual pin connectors that would be sitting side by side or in-line with uneven pins - 4 and 5 pins; then another 4 and 5 pins. Please refer to the attached simple diagram for your connection.
For some reason I couldn't get hold of a manual from the Gigabyte site of your particular model GA-81KHXT.
Nonetheless hopes this works for you. Pls post again how things turn up. Good luck and kind regards.