Question about MSI MBOX PM8M2-V (MBOXPM8M2V) Barebone
The Vcc supply of one of the onboard USB ports was shorted, there is now no power to any of the onboard USB ports or the PS2 ports. I assume the is a fuseable link on the motherboard somewhere ?? I have have reset the drivers etc and it appears to be hardware issue
Hi, I checked a known good spare motherboard with a VOM (continuity tester): pin 4 of the KB PS2 port, pin 1 of the rear USB, pin 1 & 2 of the front panel USB onboard connector, pin 3 of the infrared, pin 4 of the speaker connector, pins 4, 6,21 & 22 of the ATX 24-pin Power Connector are all interconnected (+5VDC). If that is an indication of the general +5 supply layout, you can probably hard wire a new +5 supply line to where the +5 is gone from where it is still available. Of course without a schematic, I might be off. Determining the actual component position of the surface mounted fuse (or fusible link) might not be that easy since manufacturer do not publish such information loosely. A shotgun approach (test all) would be time consuming but of course challenging. Your best bet would probably be as mentioned earlier, hardwire and install in series with the new +5 line a low amp (500ma or lower) smfuse. This article describes the power requirement of USB ports > http://pinouts.ru/Slots/USB_pinout.shtml. Hope this be of some help to you. Pls post again how things turn up. Good luck and kind regards.
Posted on Aug 18, 2007
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