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NOTE: If the system is not functioning well enough to run POST, or if the display is not functioning well enough to show POST error messages, refer to the Troubleshooting tables. Power-On Self-Test Messages 102 162 301 304 601 605 1780 1782 Probable Cause Recommended Action 102-System Board Failure DMA, timers, etc. Replace the system board. 162-System Options Not Set Configuration incorrect Run Computer Setup. CMOS reflects that an invalid configuration has been set. Run Computer Setup. RAM failure 1. Replace the memory modules. 2. Replace the system board. Memory test data error 1. Replace the memory modules. 2. Replace the system board. XX000YZZ RAM failure Replace the system board. 301-Keyboard Error Keyboard failure 1. Ensure the keys are not depressed during POST. 2. Reconnect the keyboard with the computer off. 3. Replace the keyboard. 304-Keyboard or System Unit Error Keyboard or system board error 1. Replace the keyboard. 2. Replace the TouchPad or mouse. 3. Replace the system board. 601-Diskette Controller Error Mismatch in drive type or failure in the diskette controller 1. Run Computer Checkup (TEST). 2. Check and/or replace cables. 3. Replace the system board. 605-Diskette Drive Error Mismatch in drive type Run Computer Setup. 1780-Primary Hard Drive 0 Failure Disk 0 failed to respond 1. Run Computer Checkup (TEST). 2. Replace the hard drive. Hard drive format error 1. Run Computer Checkup (TEST). 2. Replace the hard drive. 1782-Hard Drive Controller Hard drive controller failure 1. Run Computer Setup. 2. Replace the hard drive. Back to top Maintenance & Service Guide Presario 1600 Series Portable Computers Notice | Preface | Home | Product Description | Troubleshooting | Illustrated Parts Catalog Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack Troubleshooting Without Diagnostics This section provides information about how to identify and correct some common hardware, memory, and software problems. It also explains several types of common messages that may be displayed on the screen. The following pages contain troubleshooting information on: Audio Memory Battery/Battery gauge PC Card CD drive Power Diskette/Diskette drive Printer Display Touch Pad Hard drive Keyboard/Numeric keypad Hardware Installation Since symptoms can appear to be similar, carefully match the symptoms of the computer malfunction against the problem description in the Troubleshooting tables to avoid a misdiagnosis. WARNING: To avoid a potential shock hazard during troubleshooting procedures, disconnect all power sources before removing the keyboard cover or the display bezel. Before Replacing Parts When troubleshooting a problem, check the following list for possible solutions before replacing parts: l Verify that cables are connected properly to the suspected defective parts. l Run Computer Setup after connecting external devices. l Verify that all required device drivers are installed. l Verify that all required changes have been made to the CONFIG.SYS file. l Verify that all required changes have been made to the AUTOEXEC.BAT file. l Verify that all printer drivers have been installed for each application. Maintenance & Service Guide Presario 1600 Series Portable Computers Notice | Preface | Home | Product Description | Troubleshooting | Illustrated Parts Catalog Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack Keyboard Solutions Solving Minor Problems Some minor problems and possible solutions are outlined here. If the problem appears related to a software application, check the documentation provided with the software. 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. Num Lock function is not enabled. Press the Shift+NumLk keys to enable the Num Lock function and embedded numeric keypad. The Num Lock icon on the status panel turns on. Embedded numeric keypad is disabled and Num Lock function is on. External numeric keypad is connected to the computer. Disconnect the external numeric keypad from the computer. Back to Troubleshooting Without Diagnostics Maintenance & Service Guide Presario 1600 Series Portable Computers Notice | Preface | Home | Product Description | Troubleshooting | Illustrated Parts Catalog Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack Hard Drive Solutions Solving Minor Problems Some minor problems and possible solutions are outlined here. If the problem appears related to a software application, check the documentation provided with the software. 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 ...

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