Since "MS-7616" refers to the PCB model number printed directly on the board, rather than the retail box name, many users have trouble finding the manual. This board was predominantly manufactured by MSI (Micro-Star International), often as an OEM product for brands like Medion, Acer, or Fujitsu.
Here is the full post breakdown to help you find the manual and understand the board specifications.
Pinout (standard MSI pinout):
| Pin | Signal | Pin | Signal | |:---|:---|:---|:---| | 1 | HDD LED + | 2 | Power LED + | | 3 | HDD LED - | 4 | Power LED - | | 5 | Ground | 6 | Power Switch | | 7 | Reset | 8 | Ground | | 9 | Reserved | 10 | Key (no pin) |
| Symptom | Most likely fix | |----------------------------------|---------------------------------------------------------------------------------| | No power, fans don’t spin | Check 24-pin + 4-pin power connectors; test PSU with paperclip trick. | | Beep code: continuous long beeps | Memory not detected – reseat RAM, clean gold contacts, test one stick at a time.| | 1 long, 2 short beeps | Graphics error – reseat GPU or switch to integrated video (remove discrete card).| | PC powers off after 2 seconds | CPU overheating or bent socket pin – check heatsink mounting, inspect CPU pins. | | USB keyboard not working in BIOS | Use PS/2 keyboard or enable “Legacy USB Support” in BIOS. | | Boot loop after BIOS change | Clear CMOS via JBAT1 jumper. | | SATA drive not detected | Switch BIOS SATA mode from IDE to AHCI (or vice versa). Also check cable. |
Critical Note: Overclocking options (CPU FSB, voltage, RAM timings) are locked in this BIOS. This is a stable, locked OEM board.
| Connector | Label on PCB | Pins | Purpose | |---------------|---------------|------|--------------------------------| | ATX_PWR | ATX1 | 24 | Main power (use 20+4 pin cable)| | CPU_PWR | PWR2 | 4 | +12V CPU power (mandatory) | | CPU_FAN | CPU_FAN1 | 4 | PWM fan for CPU heatsink | | SYS_FAN | SYS_FAN1/2 | 3 | System fan (voltage controlled)| | FRONT_PNL | JFP1 | 9 | Power SW, Reset, HDD LED, Power LED| | AUDIO | JAUD1 | 9 | Front panel HD Audio (AC’97 compatible)| | USB | JUSB1/JUSB2 | 9 | Additional USB 2.0 ports | | SATA | SATA1–4 | 7 | Serial ATA 3Gb/s connectors | | IDE | IDE1 | 40 | Parallel ATA (for legacy HDD/ODD)| | SPDIF | JSP1 | 3 | Digital audio out header | | COM | COM1 | 10 | Serial port header (RS232) | | LPT | LPT1 | 25 | Parallel printer port header | | CMOS | JBAT1 | 3 | Clear CMOS jumper |
