HP Presario 1600 Presario 1600XL Series Maintenance and Service Guide - Page 91

Presario 1600 Series Models: 1600T, 1600-XL140, 1600-XL141, 1600-XL142, 1600-XL143, 1600-XL144, 1600-XL145, 1600-XL146, 1600-XL147, and 1600-XL150 Before You Begin Product Description Parts Catalog Specifications Battery Operations Pin Assignments Removal Sequence Troubleshooting MSG Index Preliminary Steps Clearing the Power-On Password Power-On Self Test (POST) Compaq Diagnostics Diagnostic Error Codes Troubleshooting Without Diagnostics Solving Minor Problems Contacting Compaq Support Troubleshooting Solving Minor Problems Some minor problems and possible solutions are outlined in the following tables. If the problem appears related to a software application, check the documentation provided with the software. Solving Audio Problems Some common audio problems and solutions are listed in the following table. Solving Audio Problems Problem Probable Cause Solution(s) Computer does not beep after the Power-On Self-Test (POST). This is typical; it indicates successful completion of the Power-On Self-Test (POST). No action is required. Solving Battery Pack and Battery Gauge Problems Some common causes and solutions for battery pack problems are listed in the following table. The "Solving Power Problems" section in this chapter may also be applicable. Solving Battery Pack and Battery Gauge Problems Problem Probable Cause Solution(s) Computer Battery pack Connect the won't turn on is computer to an when battery discharged. external power pack is source and charge inserted and the battery pack. power cord is unplugged. Replace the battery pack with a fully charged battery pack. Check the battery connectors on the system board to verify they are evenly spaced and that they are not bent or broken. Computer is beeping and battery icon is blinking. Battery charge is low. Immediately save any open file(s). Then complete either one of the following: q Connect the computer to an external power source to charge the battery pack. q Turn off the computer or initiate Hibernation until you can find another power source or charge the battery pack. Computer Volume is Adjust the volume. battery icon turned down (front on the too low. unit) blinks to indicate low battery condition, but computer does not beep. Battery icon doesn't light and battery pack won't fast charge. Battery pack No action is is already necessary. charged. Battery pack was exposed to temperature extremes. Allow time for the battery pack to return to room temperature. Battery pack is at end of its life. Replace battery pack. You have to RTC battery set the date is dead. and time every time you turn on the computer. Replace the RTC battery. See Removing the RTC Battery section in this guide. Top of Page Battery Pack/Gauge Problems Continued Problem Probable Cause Solution(s) Battery charge does not last as long as expected. Battery is Keep the battery being pack within the exposed to recommended high temperature temperatures range for or extremely operation or cold storage. temperatures. q Operating Range: 50° F to 104° F (10° C to 40° C) q Storage Range: -4° F to 86° F (-20° C to 30° C) Battery pack is warm to the touch after charging. Battery pack operating time is far less than the documented average operating time. An external device or PC Card is draining the battery. Battery pack has partially selfdischarged. Battery has partially selfdischarged. Power management is disabled. An external device or PC Card is draining the battery. Normal warming has occurred due to charging. Power management is turned off or disabled. Recharge the battery pack. Recharge the battery. Discharge the battery completely and then recharge it. Set a power management level in Computer Setup. Turn off or disconnect external devices when not using them. No action is required. Enable power management in Computer Setup and in Windows Power Properties. Turn off or disconnect external devices when not using them. Condition the battery pack by fully charging, fully discharging, then fully recharging it. To maintain the charge, leave battery packs in the computer when it is connected to external power. Battery pack is being exposed to high temperatures or extremely cold temperatures. If the computer is disconnected from external power for more than two weeks, remove battery packs from the computer to reduce the discharge rate. Keep the battery pack within the recommended temperature range for operation or storage. q Operating Range: 50° F to 104° F (10° C to 40° C) q Storage Range: -4° F to 86° F (-20° C to 30° C) Recharge the battery pack. Top of Page Solving DVD or CD Drive Problems Some common causes and solutions for DVD or CD drive problems are listed in the following table. Solving DVD or CD Drive Problems Problem Probable Cause Solution(s) DVD or CD Disc is upside Open the drive cannot down or is loading tray, read a compact improperly lay the disc. inserted in the compact disc in DVD or CD it (label side drive. up), then close the tray. CD is CD Plus or Pregap/Track 0 type. Cannot read these type CDs in 24x. Remove the CD. Top of Page Solving Diskette Drive Problems Some common causes and solutions for diskette drive problems are listed in the following table. Solving Diskette Drive Problems Problem Probable Cause Solution(s) Diskette drive Diskette is cannot write to write- a diskette. protected. Disable the diskette's writeprotect feature or use a diskette that is not writeprotected. Computer is writing to the wrong drive. Check the drive letter in the path statement. Not enough space is left on the diskette. Use another diskette. Drive error has occurred. Run Computer Checkup from the Compaq Diagnostics diskette. Diskette is not Format the formatted. diskette. At the system prompt, enter: FORMAT A: Diskette drive cannot read a diskette. The wrong type of diskette is being used. Use the type of diskette required by the drive. Diskette has a Copy files to bad sector. hard drive or another diskette. Reformat bad floppy. Drive error has occurred. Run Computer Checkup from the Compaq Diagnostics diskette. Diskette is not Format the formatted. diskette. At the system prompt, enter: FORMAT A: Cannot boot from diskette. Bootable Put the diskette is not bootable in drive A. diskette in drive A. Diskette Boot has incorrect setting in Computer Setup. Run Computer Setup and set diskette as first to boot. Top of Page Solving Display Problems This section lists some common causes and solutions for computer display and external monitor problems. You can perform a monitor self-test on an external VGA color or monochrome monitor by disconnecting the monitor from the computer. To do so, complete the following steps: 1. Turn off the monitor. 2. Turn off the computer. 3. Disconnect the monitor signal cable from the computer. 4. Turn on the monitor and allow it to warm up for one minute. The display should be white. A narrow black border may also appear on the left and right sides of the display. Either of these displays indicates that the monitor is working properly. Solving Display Problems Problem Probable Cause Solution(s) Screen is dim. Control for brightness Adjust the Brightness of the display by using Fn+F7 (¯) or Fn+F8 (-). Computer screen is in direct light. Tilt display or move computer. Screen is blank. Screen save was initiated by Power Management due to lack of user activity. Press any key or touch the TouchPad. Display has overheated. If computer is in direct sunlight, move it and allow it to cool off. Display is blank System is in and the Half- Suspend Moon icon mode. appears on the Disqplay2 status. Press any key or touch the TouchPad. Internal display Display is blank and function was the screen on switched to an external the external monitor monitor. displays information. Use Fn+F3 to switch between LCD or CRT. Top of Page Solving Display Problems Continued Problem Probable Cause Solution(s) Internal Using 1024 Restart the display flashes × 768 or computer. or has garbled higher characters resolution when on external computer is monitor and connected to have external toggled monitor. back to internal display, which supports up to 800 × 600. The light Improper tubes on the backlight or edge of the display display panel cable do not light up connections at all and Power-On SelfTest (POST) completes Defective inverter board. when the unit Defective is powered display up.** cable. Replace the display assembly. Replace the display assembly. Replace the display assembly. Defective display panel. Replace the display assembly. Defective system board. Replace the system board. The light Defective tubes on the system edge of the board. display panel do not light up at all and Power-On Self- Test (POST) does not complete when the unit is powered up.** Replace the system board. Backlight Improper 1. Reseat the (brightness) display display cable to cannot be cable the system adjusted with connections. board. Fn+F7 (¯) or Fn+F8 (-).*** 2. Replace the display assembly. Defective inverter board. Replace the display assembly. Defective display cable. Replace the display assembly. Defective system board. Replace the system board. ** This problem indicates that the backlight or its power circuitry has failed. Since you cannot observe the POST result on the display panel when the backlight is not functioning, connect the unit to an external monitor before powering the unit up. If an external monitor is not available, verify that POST completes by opening and closing the display, listening for the single or double beep, and watching for the icons to turn on at the front of the computer. Top of Page Solving Display Problems Continued Problem Probable Cause Solution(s) This display Improper Reseat the panel has a display display cable to continuous cable the following until pattern across connections the problem is it (e.g., a solved: "jailbars" pattern), has a 1. System board single color on it, or has garbled 2. Display assembly graphics across the entire panel. This failure is for patterns across Defective display cable. Replace the display assembly. the entire panel Defective Replace the (not just on one inverter display assembly. section). board. Defective system board. Replace the system board. A single line, Defective small group of display lines, or block panel. appears on the display panel. This failure occurs in only a section of the display panel. Replace the display assembly. Top of Page To perform a "self-test" on an external VGA color or monochrome monitor, complete the following steps: The screen should be white. A NOTE: narrow black border may also appear on the left and right sides of the display. Either of these displays indicates that the monitor is working properly. Solving Hard Drive Problems Some common causes and solutions for hard drive problems are listed in the following table. CAUTION: To prevent loss of information, always maintain an up-to-date backup of your hard drive at all times, in case of errors or failures. Solving Hard Drive Problems Problem Probable Cause Solution(s) Reading hard drive takes an unusually long time after restarting the computer. System entered Hibernation due to low battery condition and is now exiting from it. Give the system time to restore the previously saved data to its exact state before Hibernation. Hard drive error occurs. Hard drive has Run Computer bad sectors or Checkup. has failed. Hard drive Hard drive is does not work. not seated properly. Turn off and unplug the computer, remove the battery pack, and remove and then reinstall the hard drive. Top of Page Solving Hardware Installation Problems Some common causes and solutions for hardware installation problems are listed in the following table. Solving Hardware Installation Problems Problem Probable Cause Solutions(s) A new device is not recognized as part of the computer system. Cable(s) of new external device are loose or power cables are unplugged. Power switch of new external device is not turned on. Device is not seated properly. Ensure that all cables are properly and securely connected. Turn off the computer, turn on the external device, then turn on the computer to integrate the device with the computer system. Turn off the computer and reinsert the device. Top of Page Solving Keyboard/Numeric Keypad Problems Some common causes and solutions for keyboard/numeric keypad problems are listed in the following table. Solving Keyboard/Numeric Keypad Problems Problem Probable Cause Solution(s) Embedded numeric keypad on computer keyboard is disabled. Embedded numeric keypad is disabled and Num Lock function is on. Num Lock function is not enabled. Press the Fn+NumLk keys to enable the Num Lock function and embedded numeric keypad. The Num Lock icon on the status panel turns on. External Disconnect numeric the external keypad is numeric connected to keypad from the computer. the computer. Top of Page Solving Memory Problems Some common causes and solutions for memory problems are listed in the following table. Solving Memory Problems Problem Probable Cause Solution(s) Memory count during PowerOn Self-Test (POST) is incorrect. "Out of Memory" message is displayed on the screen or insufficient memory error occurs during operation. Optional Ensure that memory the optional expansion memory card expansion is installed card is incorrectly, installed is incompatible correctly. with the computer, or is defective. System ran out of memory for the application. Check the application documentation for memory requirements. Install additional memory. Too many TSR Remove from (terminate- memory any and stay- TSR resident) applications applications that you do are running. not need. Top of Page Solving Minor Problems continued