HP Pavilion xt155 HP Pavilion & Compaq Presario Notebook PC - Service Manu - Page 85
Symptom, Call Center, Suggestions, Repair Center, Likely Causes, Comments, Important, Keyboard
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Symptom Region Code error. "System Error: Unable to read drive" message. No DVD or CD-RW software on notebook. All DVD play is erratic. Keyboard Some or all keys do not work properly. Embedded numeric keypad does not work. PS/2 keyboard and mouse with Y-adapter do not work. Call Center: Suggestions DVDs contain embedded regional codes that prevent them from playing outside region in which they are sold. This error occurs when trying to play DVD intended for different region. Important: Most DVD drives allow region code to be changed only a limited number of times (usually no more than four). When this limit is reached, last change is hard-coded on DVD drive, and is permanent. Refer to DVD player software help for details. Make sure disk is clean, undamaged, and inserted correctly. Clean with soft cloth or replace as needed. Wait 5 to 10 seconds after closing tray before pressing Play. Restart notebook. If software was removed, use the Recovery CDs to reinstall factory software. Some DVDs include software called "PC Friendly". This software can cause errors or erratic play. If needed, uninstall PC Friendly and restart notebook. Check settings in Control Panel. Press Fn+F8 to activate numeric keypad, and Lock key to turn on number lock. Avoid touching touch pad while booting or resuming. Check devices separately. Repair Center: Likely Causes CD/DVD drive. Motherboard. Keyboard. Motherboard. Keyboard. Motherboard. Y-adapter. PS/2 device. Motherboard. Repair Center: Comments HP warranty does not cover expense of correcting this situation. Make sure CD/DVD drive is installed properly. Try reinserting ribbon cable in connector on motherboard. 3-12 Troubleshooting and Diagnostics Service Manual