Acer TravelMate 4220 TravelMate 4520/4220, Extensa 4420/4120 Service Guide - Page 75

Chapter 4 System Troubleshooting This chapter provides instructions on how to troubleshoot system hardware problems. If the problem can't be resolved using the procedures described here, information for getting online technical assistance is also provided. Hardware Diagnostic Procedure IMPORTANT: The diagnostic tests described in this chapter are only intended to test Acer products. Non-Acer products, prototype cards, or modified options can give false errors and invalid system responses. 1. Obtain as much detail as possible about the presented failure symptoms. 2. Verify the symptoms by attempting to re-create the failure through diagnostic tests or by repeating the same condition that precedes the symptoms. 3. Refer the table below to determine which corrective action to perform. Problem Power failure POST failure Specific component failure Intermittent failure Symptom The power indicator does light up or stay lit. POST does not complete. No beep or error codes issued. POST detects an error and displayed messages on screen. Dysfunctional component symptoms (e.g. blurred LCD display). Symptoms cannot be re-created Section to Refer to "Power System Check" on page 67 "POST Error Message" on page 69 "Undetermined Problems" "POST Error Message" on page 69 "POST Error Message" on page 69 Use the customer-reported symptoms and go to the "POST Error Message" section on page 69. "Intermittent Problems" on page 80 Chapter 4 65