Lenovo Horizon 2 27 Table PC Lenovo Horizon 2 27 All-In-One PC Hardware Mainte - Page 25

Chapter 6. Symptom-to-FRU Index The Symptom-to-FRU index lists error symptoms and possible causes. The most likely cause is listed first. Always begin with Chapter 4, "General Checkout," on page 11. This index can also be used to help you decide which FRUs to have available when servicing a computer. If you are unable to correct the problem using this index, go to "Undetermined problems" on page 20. Notes: • If you have both an error message and an incorrect audio response, diagnose the error message first. • If you cannot run the diagnostic tests or you get a diagnostic error code when running a test but did receive a POST error message, diagnose the POST error message first. • If you did not receive any error message look for a description of your error symptoms in the first part of this index. Hard disk drive boot error A hard disk drive boot error can have the following causes. Error The startup drive is not included in the boot sequence configuration. No operating system is installed on the boot drive. The boot sector on the startup drive is corrupted. The drive is defective. FRU/Action Check the configuration and ensure the startup drive is in the boot sequence. Install an operating system on the boot drive. The drive must be formatted. Do the following: 1. Attempt to back up the data on the failing hard disk drive. 2. Use the operating system to format the hard disk drive. Replace the hard disk drive. Power Supply Problems Follow these procedures if you suspect there is a power supply problem. Check/Verify Check that the following are properly installed: • Power Cord • On/Off Switch connector • System Board Power Supply connectors • Microprocessor connections Check the power cord. Check the power-on switch. FRU/Action Reseat connectors Power Cord Power-on Switch © Copyright Lenovo 2014 19