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Compaq Presario SR1803WM Desktop PC Troubleshooting

Motherboard Specifications, P5RC-LA (Agena)

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Motherboard specifications table

Part / FeatureSpecification / Support
Motherboard description
  • Motherboard manufacturer's name: Asus P5RC-LA
  • HP/Compaq name: Agena-GL8E
CPU/Processor
  • Socket: 775
  • Supports the following processors:
    • Pentium D 820 (Smithfield, 90nm)
    • Pentium 4 631, 641, 651, 661 (Cedar Mill, 65nm)
    • Pentium 4 630, 640, 650 (Prescott, 90nm)
    • Pentium 4 520J/521, 530J/531, 540J/541, 550J/551 (Prescott, 90nm)
    • Celeron D 352, 356 (Cedar Mill, 65nm)
    • Celeron D 325J/326, 330J/331, 335J/336, 340J/341, 345J/346, 351, 355 (Prescott, 90nm)
Front-side bus (FSB)
  • 800/533 MHz
Chipset
  • Northbridge: ATI RC410 Graphics Memory and Controller Hub (GMCH)
  • Southbridge: ATI IXP450
BIOS features
  • 4 Mb FWH EEPROM
  • HP BIOS with enhanced ACPI, DMI, Green, and PnP Features Plus
Form factor
  • Micro ATX size form factor, 9.6 in x 9.6 in
Memory
  • Single-channel memory architecture
  • 2 x 240-pin DIMM sockets support non-ECC 400/533 MHZ DDR2 memory modules
  • Maximum HP/Compaq approved memory is 2 GB
Expansion slots
  • One PCI Express
  • Three PCI
Video graphics
  • Integrated
  • Supports PCI Express x16 graphics cards
Onboard audio
  • Built-in Azalia 8-channel audio
  • Realtek ALC883 8-channel High Definition Audio CODEC
Onboard LAN
  • Realtek RTL8100 10/100 Mbps Fast Ethernet controller
Back panel I/O
  • PS/2 keyboard (purple)
  • PS/2 mouse (green)
  • Four USB 2.0 ports
  • One IEEE 1394a port
  • One RJ45 networking port
  • One parallel port
  • One VGA port
  • S-Video port
  • S/PDIF out
  • Six audio ports:
    Side speaker out port (gray)
    Rear speaker out port (black)
    Center/Subwoofer port (yellow-orange)
    Microphone jack (pink)
    Line in jack (light blue)
    Line out jack (lime)
Internal connectors
  • ATX power connector
  • ATX +12v power connector
  • Two IDE connector
  • Four SATA connectors
  • One floppy drive connector (Labeled FLOPPY1)
  • CPU fan connector (Labeled CPU_FAN1)
  • System fan connector (also known as duct or chassis fan)
  • System indicator LEDs / power switch / reset button connector
  • Jumper to clear CMOS (Labeled CLEAR CMOS)
  • Jumper to clear password (Labeled CLEAR P.W)
  • Optical drive audio input (Labeled CD_IN1)
  • line level audio input (Labeled F_LINE_IN1)
  • Front panel headphone and microphone connector (Labeled F_Audio1)
  • Front panel power and LED connectors (Labeled F_PANEL1)
  • Two USB connectors supporting 4 additional USB 2.0 ports on front panel (Labeled F_USB1 and F_USB2)
  • One IEEE 1394a connector supporting one 1394a port (Labeled F_1394)
NOTE:Motherboard specifications are subject to change without notice.
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Motherboard layout and photos

Figure 1: layout
Figure 2: Photograph
Figure 3: Backplate
1 - PS/2 mouse port (green). This port is for a PS/2 mouse.
2 - Parallel port. This 25-pin port connects a parallel printer, a scanner, or other devices.
3 - IEEE 1394a port. This 6-pin IEEE 1394a port provides high-speed connectivity for audio/video devices, storage peripherals, PCs, or portable devices.
4 - LAN (RJ-45) port. This port allows connection to a Local Area Network (LAN) through a network hub.
5 - Rear Speaker Out port (black). This port connects to the rear speakers on a 4-channel, 6-channel, or 8-channel audio configuration.
6 - Center/Subwoofer port (yellow orange). This port connects the center/subwoofer speakers.
7 - Line In port (light blue). This port connects a tape, CD, DVD player or other audio sources.
8 - Line Out port (lime). This port connects a headphone or a speaker. In 4-channel, 6-channel, and 8-channel mode, the function of this port becomes Front Speaker Out.
9 - Microphone port (pink). This port connects a microphone.
10 - Side Speaker Out port (gray). This port connects to the side speakers in an 8-channel audio configuration.
11 - USB 2.0 ports 1, 2, 3, and 4. These four 4-pin Universal Serial Bus (USB) ports are available for connecting USB 2.0 devices.
12 - Video Graphics Adapter port. This 15-pin port is for a VGA monitor or other VGA-compatible devices.
13 - S-Video: common to many home video components. The video signal is split up into two channels, providing good image fidelity.
14 - Coaxial S/PDIF Out port. This port connects an external audio output device via a coaxial S/PDIF cable.
15 - PS/2 keyboard port (purple). This port is for a PS/2 keyboard.
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Clearing the BIOS settings

CAUTION: Do not change any jumper setting while the computer is on. Damage to the motherboard can result.
Do not change any jumper settings while the PC is running. Damage to the motherboard may result.
This motherboard has jumpers to:
  1. Clear the Real Time Clock (RTC) RAM in CMOS.
  2. Disable password checking.
Figure 4: Jumper locations

Clearing CMOS

To clear CMOS, follow these steps:
  1. To clear CMOS settings, set jumper labeled CLRTC to pins 2-4.
  2. Wait at least 10 seconds and then return the jumper to pins 4-6.
    Warning: Do NOT start the PC with this jumper set to pins 2-4.
  3. The PC may now be restarted.

Clearing the BIOS password

The BIOS password is used to protect BIOS settings from unwanted changes. If you have forgotten your password you may disable password checking.
To erase the BIOS password follow these steps:
  1. To clear BIOS password, temporarily set the jumper labeled "Clear P.W " to pins 1-3.
  2. Wait at least 10 seconds and then return the jumper to pins 3-5.
  3. You may now start the computer, enter BIOS setup, and change or erase the password.
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