The Acer IPIMB-AR (Rev 1.02A) is an OEM Micro-ATX motherboard based on the Intel B75 Express chipset, featuring an LGA 1155 socket compatible with 2nd and 3rd Generation Intel processors. Key features include four DDR3 DIMM slots, SATA III/II support, and a standard 14-pin front panel header, with detailed specifications documented by user communities, such as those found at The Retro Web The Retro Web Acer IPIMB-AR - The Retro Web
Here is the information for the Acer IPIMBAR (also known as IPIMB-AR) Rev: 102A motherboard, focusing on the top front panel header (front panel connectors).
This motherboard is commonly found in older Acer desktops like the Aspire M3800, M5800, AM5620, and eMachines ET1160 series.
Perhaps the most practical section of the IPIMB-AR manual—and the one most frequently consulted by repair technicians—is the pinout definition for the front panel header. When rebuilding a PC or transferring a motherboard into a new case, connecting the power switch, reset switch, and LED indicators is often a game of trial and error. acer ipimbar rev 102a manual top
The manual eliminates this guesswork. By providing a diagram of the F_PANEL header, it tells the user exactly which pins correspond to the Power On signal, the Hard Drive LED, and the Reset function. On the IPIMB-AR, these pins are often tightly grouped; having the manual prevents shorting the wrong pins, which could damage the board.
CLR_CMOS or PSWD. Short pins 1-2 for 10 seconds to clear BIOS—no manual needed.For users looking to modernize an older machine, the manual serves as a guide to expansion. It maps out the PCIe x16 slot (used for dedicated graphics cards) and the PCIe x1 slots. Furthermore, it details the internal headers for USB 2.0 and USB 3.0, as well as the SATA connectors.
Understanding the SATA configuration is vital. The manual distinguishes between SATA II (3Gb/s) and SATA III (6Gb/s) ports if applicable, guiding the user on where to plug in an SSD for maximum speed. It also clarifies the location of the CMOS battery and clear CMOS jumper, which are essential steps for resetting the BIOS if the system becomes unresponsive during an update. The Acer IPIMB-AR (Rev 1
Without the top diagram, it’s easy to short the wrong pins. Here is the verified connector layout from the Acer IPIMBAR REV 102a manual top page:
| Connector | Code on Board | Pin 1 Location | Purpose |
|-----------|---------------|----------------|---------|
| Front Panel | F_PANEL | Bottom-left (square pad) | PWR_SW (pins 6&8), HDD_LED (pins 2&4) |
| CMOS Clear | CLR_CMOS1 (near battery) | Pins 1-2: Normal, Pins 2-3: Clear | Move jumper to pins 2-3 for 10 sec |
| USB 2.0 Header | F_USB1 | 9-pin (missing pin 9) | Standard dual USB 2.0 ports |
| Audio Header | F_AUDIO | 7-pin (pin 2 is GND) | AC’97 or HD Audio (check BIOS) |
| CPU Fan | CPU_FAN | 4-pin PWM | Use 4-pin fan for speed control |
Warning from the manual: Do not plug a standard ATX 12V 8-pin into the 4-pin CPU power header. The pinout is different and will short the board. Don’t force the connector: The “missing pin” (position
If Acer’s website is slow, these sites often host the exact IPIMBAR REV 102a manual top view:
Acer classifies the IPIMBAR (model: Rev 102A) as a proprietary OEM board. Unlike ASUS or Gigabyte, Acer expects users to contact support or buy a replacement case. The "manual" on their site only covers safety regulations, not the top (motherboard layout) diagram.