ATX12V 2x2 Connector not Installed
There are several reasons why a desktop board would fail to power up. One reason is that the power supply unit (PSU) might not be an ATX12V PSU, which is required for this platform. The Intel® Pentium® 4 processor requires additional 12V current supplied by the 2x2 power connector found on the ATX12 PSU. The connector must be inserted into the board header located next to the processor in order for the system to boot up.
Insufficient Current
It is also possible the power supply does not supply sufficient current. A higher-wattage supply may be required for heavily-loaded configurations. If the power supply does not provide sufficient current and it lacks overload protection, the power supply may become damaged.
Insufficient Standby Current
The power supply must provide +5Vsb current of 800mA or greater to support Wake On LAN* and Suspend to RAM requirements. It is very important to calculate the amount of standby current your particular configuration consumes and compare this with the PSU support.
No Momentary Switch
Another reason the board could fail to power up is the chassis does not contain a momentary switch for the sleep/resume feature. A symptom of this problem is the fan turns on for one second then shuts down and the board will not boot. Powering the system without a momentary switch may cause the desktop board to be stuck in sleep mode. To correct this problem, use the correct type of switch and remove the battery for 20 minutes to clear the flip-flop that controls sleep mode.
Turning Off Power During POST
Turning your system power off may take up to four seconds while the BIOS performs the Power On Self Test (POST). Simply depress and hold the power on/off button until the system powers down.
Beep Code During Boot
A sequence of short beeps after turning the power
on indicates that there was a problem during RDRAM*
memory device detection. Check to ensure system
memory is properly installed, and ensure the RDRAM
RIMMs* and continuity RIMMs you are using meet the
following specifications and populations:
- PC800 or PC600 RDRAM RIMMs
- Matching memory speed, size and density in each bank (RIMM1&2,RIMM3&4)
- Any banks not populated with RIMMs must have continuity RIMMs
- ECC and Non-ECC RIMMs supported
Connect processor heat sink fan power cable to the fan header labeled CPU FAN on the desktop board.
BIOS Recovery
If you are sure that you have integrated the PC
components correctly but the system is not booting
properly, letting you enter BIOS Setup, or reflash
the BIOS, then you may need to perform a BIOS
recovery. To do this:
- Place the latest BIOS revision on a bootable floppy disk
- Make sure the system power is off
- Ensure that you have known-good RDRAM PC800 or PC600 memory installed
- Put the bootable BIOS disk in the floppy disk drive
- Remove the BIOS configuration jumper
- Turn on the PC
- Wait several minutes while the BIOS is reinstalled into the desktop board flash memory. There will not be any video during the BIOS recovery.
- After you hear two beeps and the floppy disk drive light turns off, remove the BIOS disk.
- Turn off the PC
- Replace the BIOS configuration jumper
- Turn the PC back on
| Mode | Jumper Position | Function |
| Normal | Pins 1-2 shorted | Normal operation and changing standard BIOS options |
| Configure | Pins 2-3 shorted | Modify passwords, memory latencies, and IRQs |
| Recovery | Open | The BIOS attempts to recover default BIOS configuration from a diskette. SPD system memory must be used to complete a BIOS recovery. |
Caution: Turn the power off before moving the configuration jumper.
Enabling Ultra ATA/66/100 Hard Drive Support
To get Ultra ATA/66/100 disk transfer support,
ensure that the following conditions are
met:
- Use an Ultra ATA/66/100 capable hard drive
- Follow the cable installation instructions in the " Assembly" section of this integration guide.
- Follow the instructions in the " Windows 98 SE Setup" and " Windows ME Setup" sections of this integration guide to enable DMA transfers in the operating system.
- If your hard drive includes a device driver or utility, make sure that you load it and enable Ultra ATA/66/100 transfers.
Make sure you are using a 1.5V AGP
graphics card. The boards do not support 3.3V AGP
cards, only the latest 1.5V models are
supported.
For additional troublshooting information, please
view the
Top Technical Issues site.