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HELP......need pin or wire color codes for USB connector on P4U-LA mobo (micro-ATX)
I bought a used HP Pavilion 7955 desktop PC for $10 on eBay and the stock ASUS
P4U-LA mobo was totally fried from a lightning strike. So I bought an Intel D845HV mobo to replace it, and the install went smooth except I cant figure out how to connect the HP's front-panel USB connector to the D845HV mobo connection. It's a standard 10-pin connector, but the female connection on the D845HV is configured different than the ASUS P4U-LA mobo. Basically, I need to get the pin codes off the P4U-LA female USB connector so I can properly mate the front-panel male connector to the D845HV female USB mobo connection. I have to be careful about just playing around with this connector because putting 5V power to the wrong pin can fry my new mobo.....correct? I tried looking up the P4U-LA technical manual on the ASUS site but no luck....it appears it was a custom micro-ATX board for this HP system. Please let me know where I can find the USB pin code for this mobo. |
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In article , "TJM" tjm@nospam wrote:
I bought a used HP Pavilion 7955 desktop PC for $10 on eBay and the stock ASUS P4U-LA mobo was totally fried from a lightning strike. So I bought an Intel D845HV mobo to replace it, and the install went smooth except I cant figure out how to connect the HP's front-panel USB connector to the D845HV mobo connection. It's a standard 10-pin connector, but the female connection on the D845HV is configured different than the ASUS P4U-LA mobo. Basically, I need to get the pin codes off the P4U-LA female USB connector so I can properly mate the front-panel male connector to the D845HV female USB mobo connection. I have to be careful about just playing around with this connector because putting 5V power to the wrong pin can fry my new mobo.....correct? I tried looking up the P4U-LA technical manual on the ASUS site but no luck....it appears it was a custom micro-ATX board for this HP system. Please let me know where I can find the USB pin code for this mobo. http://h20000.www2.hp.com/bizsupport...3&locale=en_US Since that is an OEM board, only HP will have the docs. It is roughly the same vintage as a P4B-M board, but doesn't look the same. Asus USB headers consist of 2x5 pins, of which nine pins are present and one pin is missing. There are two USB interfaces, occupying four pins each. The nineth pin is marked as "NC" or no connect. +5 D- D+ GND (No_connect) USBxx X X X X X ---- Top five pins goes to one X X X X USB interface. Last pin has no connection, leaving four pins used. USBxx X X X X X X X X X ---- Bottom has four pins and +5 D- D+ GND is keyed by the missing pin It forms the second interface. Now, the problem is, on an OEM board, anything is possible. Asus could have designed the USB header, to meet HP's requirements, rather than using the standard Asus header pattern. You could use an ohmmeter, and buzz from the USB pins on the front of the computer, to the cable assembly inside the case. Perhaps you can figure out the labelling of the pins that way. That would be safer than relying on the above info. Or, go to frontx.com, and make up a "drive tray" interface for whatever interfaces the D845HV offers. Paul |
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