![](/images/new-backgrounds/1170213/17021345x1.webp)
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| Pin assignment of internal ports |
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| Pin | Signal | Pin | Signal |
| 1 | GND | 2 | Speaker - |
| 3 | "Stand by" LED + | 4 | Key |
| 5 | Key | 6 | GND |
| 7 | "Power On" LED + | 8 | Speaker + |
| 9 | "Power On" LED + | 10 | Reserved |
| 11 | "Power On" LED - | 12 | Reserved |
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| "Stand by" LED - |
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| (GND) |
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| 13 | "Message" LED + | 14 | Key |
| 15 | "Message" LED - | 16 | Password Skip |
| 17 | Key | 18 | "SCSI" LED Input (low asserted) |
| 19 | "HD" LED + | 20 | "SCSI" LED Input (low asserted) |
| 21 | "HD" LED - | 22 | Recover BIOS |
| 23 | GND | 24 | Key |
| 25 | 26 | GND | |
| 27 | reserved | 28 | GND |
| 29 | 30 | GND |
Serial ATA
1
Pin | Signal | Pin | Signal |
1 | GND | 2 | Transmit data positive |
3 | Transmit data negative | 4 | GND |
5 | Receive data negative | 6 | Receive data positive |
7 | GND | 8 | Key |
English - 13 |