HP Dx2250 HP Compaq dx2250 Microtower Business PC - Illustrated Parts & Se - Page 4

System Hardware Interrupts IRQ System Function 0 Timer Interrupt 1 Keyboard 2 Interrupt Controller Cascade 3 Serial Port (COM B) 4 Serial Port (COM A) 5 Unused, available for PCI 6 Diskette Drive 7 Parallel Port (LPT 1) IRQ System Function 8 Real-Time Clock 9 Unused 10 Unused, available for PCI 11 Unused, available for PCI 12 Mouse 13 Coprocessor 14 Primary ATA (IDE) Controller 15 Secondary ATA (IDE) Controller Failsafe Boot Block ROM The computer comes with a reprogrammable flash system ROM (read only memory). To upgrade the ROM, download the latest ROM BIOS image from the HP Web site (www.hp.com) and follow the online GUI/instructions. Your system ROM includes a Failsafe Boot Block that is protected during the flash process and allows the computer to be restarted in the unlikely event of an unsuccessful ROM flash. If the system detects an invalid system ROM during the boot sequence, the Failsafe Boot Block attempts to locate a valid BIOS image on removable media. To recover from the Boot Block recovery mode complete the following steps: Boot Block Recovery 1. Remove any bootable media from the computer and turn off power. 2. Insert a flash drive or CD containing the ROM BIOS. 3. Turn on power to the system. 4. The system will automatically flash the ROM. After a successful flash, the system will either automatically restart or prompt the user to unplug the unit, wait 5 seconds, reattach the power cord, and then press the power button. Password Security Establishing a Setup password: 1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart. 2. As soon as the computer is turned on, press F10 when the monitor light turns green to enter Computer Setup. Press Enter to bypass the title screen, if necessary. If you do not press F10 when prompted, a restart will be necessary. 3. Select Security > Setup Password and follow the instructions on the screen. 4. Before exiting, click File > Save Changes and Exit. Establishing a Setup password: 1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart. 2. As soon as the computer is turned on, press F10 when the monitor light turns green to enter Computer Setup. Press Enter to bypass the title screen, if necessary. If you do not press F10 when prompted, a restart will be necessary. 3. Select Security > Power-On Password and follow the instructions on the screen. Before exiting, click File > Save Changes and Exit. Changing a password: 1. Turn on or restart the computer. If you are in Windows, click Start> Shut Down > Restart. To change the Setup password, go to step 2. To change the Power-on password, go to step 3. 2. To change the Setup password, as soon as the computer is turned on, press F10 when the monitor light turns green to enter Computer Setup. Press Enter to bypass the title screen, if necessary. 3. When the key icon appears, type your current password, a slash (/) or alternate de-limiter character, your new password, another slash (/) or alternate delimiter character, and your new password again as shown: current password/new password/new password. NOTE: Type the new password carefully since the actual characters do not appear on the screen. 4. Press ENTER. The new password will take effect the next time the computer is restarted. Deleting a password 1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart. To delete the Setup password, go to step 2. To delete the Power-On password, go to step 3. 2. To change the Setup password, as soon as the computer is turned on, press F10 when the monitor light turns green to enter Computer Setup. Press Enter to bypass the title screen, if necessary. 3. When the key icon appears, type your current password followed by a slash (/) or alternate delimiter character as shown. Example: currentpassword/ 4. Press Enter. 4. Select the specific product. 5. Select the OS. 6. Click the Diagnostics link. 7. Select HP Insight Diagnostics Offline Edition. 8. Select the proper language and click Download. Error Conditions and Messages Feature Purpose How It Is Established Floppy drive controller Prevents the transfer of data to or from the Setup Utilities floppy drive. Device Boot Disabling Prevents booting from and or all of these devices: Internal or external USB, Internal ODD, or Internal FDD Setup Utilities Security Option Prevents use of computer until password is Setup Utilities entered. Can apply to both initial startup and restart. BIOS Write Protect Restricts ability to change ROM BIOS with- Setup Utilities. out approval. USB Controller Allows you to disable or enable all USB devices. Setup Utilities Diagnostic LEDs LED Color LED Activity State/Message Power Green On Computer on Power Green 1 blink every 2 seconds Suspend to RAM (some Models) Power Red 1 blink every second followed CPU thermal shutdown by a 2 second pause Power Red 5 blinks, 1 blink every second Pre-video memory error followed by a 2 second pause Power Red 6 blinks, 1 blink every second Pre-video graphics error followed by a 2 second pause Power Red 8 blinks, 1 blink every second Invalid ROM based on Checksum followed by a 2 second pause none none 1 blink then power shut down Cannot detect CPU none none System does not power on and System unable to power on LEDs are not flashing Common POST Error Messages Screen Message Beeps Probable Cause Recommended Action 103-System Board Failure none DMA, timers 1. Clear CMOS memory. 2. Remove expansion board. 3. Replace system board. 214-DIMM none Configuration Warning Populated DIMM configura- Rearrange the DIMMs so that tion is not optimized each channel has the same amount of memory. 301-, 304-Key- none board error Keyboard failure. Check keyboard connection or keys. Replace keyboard. If 304, possible system board problem. 501-Display 1L, 2S Graphics controller. Adapter Failure 1. Reseat graphics card. 2. Check monitor connection. 3. Replace graphics card. 1720-SMART none Hard Drive Detects Imminent Failure Hard drive is about to fail. Run drive protection system test if available. Check for firmware patch for erroneous error message. 1796-SATA none Cabling Error One or more SATA devices Ensure SATA0 and SATA1 are are improperly attached. used before any other SATA con- nectors. 1801-Microcode Patch Error none Processor not supported by ROM BIOS. 1. Upgrade BIOS to proper version. 2. Change the processor. NOTES: L = long, S = short Clearing CMOS 1. Turn off the computer and any external devices, disconnect the power cord from the power outlet, and remove the access panel. 2. Locate jumper JBAT1 and move the jumper from pins 2-3 to pins 1-2. 3. Leave the jumper on pins 1-2 for 5 seconds then, move the jumper back to pins 2-3. 4. Replace the access panel and connect the power cord to the power outlet. 5. Turn on the computer, allow it to start. Diagnostic Functions Diagnostic functions are provided by the Setup Utility (in system ROM) and by Insight Diagnostics. Insight Diagnostics provides detailed system information including: • Processor type and speed • Memory amount, mapping, and integrity • Hardware peripheral availability/settings • Hard drive type, space used/available • System identification, asset tracking Insight Diagnostics may be found on the Documentation and Diagnostics CD that shipped with the computer. The tool may also be downloaded from the hp Web site using the following procedure: 1. Go to www.hp.com 2. Click the Software and Download driver link. 3. Enter the product number (for example, dx2250) in the text box and press the Enter key. dx2250 Illustrated Parts & Service Map, MT Chassis 440318-001 page 4