Trying to install an ASUS H81M-C Mainboard with Intel core i5-4460. No way to turn on. Mainboard's Power led is on. Nothing happens at all. All connections are OK. Anyone has an idea? Thanks.
When you say that all connections are ok, you understand that we have to verify as this is the most common problem that occurs when installing motherboards. Obviously you have the large connector from the power supply plugged in since you have the power led on the motherboard. This is good. There is also the ATX 12V CPU 4-pin power connector that must be connected just above and to the left of the CPU. But the most often messed up arrangement are the front panel connections to the motherboard at the lower right corner. This is a 9-pin connector block (actually 10, but top right corner pin not there and bottom right not used).
In the link attached, go to page 26 of the pdf, which is page 1-18 of the manual. At the top of the page is a drawing of the connector block. The green power led takes the first two pins in the top row from the left. The connector plug should have a green and a white wire. The green is the positive and goes on the left pin of the pair.
Right below that is the two pins for the HDD light. This plug should have red and white wires. The red wire is positive and goes to the left pin of the pair. Going back to the top, the power button is the remaining two pins. These wires can vary in color from case to case, but if you don't see a label, just follow them back to the power switch to figure out which pair they are. This connector can be installed either way, there is no fixed polarity. The remaining two pins are for the reset switch, which some cases have and some don't. This connection does not to be used.
If you have everything correct and the unit still won't power up, then you need to verify that the power switch is working. If you have a reset switch, it is easy to test, just switch the reset and power button connectors and press and release the reset button and see if the board powers up. If you don't have a reset switch, remove the connector from the power button pins and carefully short them together for a brief second, which simulates pressing the power button. If it still doesn't power up, then there is something wrong with the motherboard.
One last thing, if the front panel connectors are all installed into one plug (which some manufacturers like DELL does, and you are installing this motherboard into their case, be sure to verify that the wires on the connector goes to the appropriate front panel switches/indicators, as these connector blocks are not fully standardized.
Nov 23, 2015 |
Intel Computers & Internet