Lenovo ThinkPad 560Z ThinkPad 560X Hardware Maintenance Manual (Oct 1997) - Page 51
Beep Symptoms
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Beep Symptoms Symptom / Error Continuous beeps. One beep and a blank, unreadable, or flashing LCD. One beep, and the message "Unable to access boot source." One long and two short beeps, and a blank or unreadable LCD. One long beep followed by four short beeps each time the power switch is operated. (System cannot power on due to low battery voltage.) One beep every second. (System is shutting down due to low battery voltage.) Two short beeps with error codes. Two short beeps with blank screen. FRU / Action in Sequence System board. 1. Reseat the LCD connector. 2. LCD assembly. 3. System board. 1. Boot device. 2. System board. 1. System board. 2. LCD assembly. Connect the AC Adapter or install a fully charged battery. Connect the AC Adapter or install a fully charged battery. (Allow the system to completely shut down before changing the battery.) POST error. See "Numeric Error Codes" on page 36. System board. No Beep Symptoms Symptom / Error No beep, power-on indicator not on, and a blank LCD during POST. No beep, power-on indicator on, and a blank LCD during POST. No beep, power-on indicator on, and a blinking cursor only during POST. No beep during POST but system runs correctly. FRU / Action in Sequence 1. Go to "Power Systems Checkout" on page 30. 2. DC/DC card. 3. System board. 4. Check the power outlet. DC/DC card. System board. DC/DC card. System board. 1. Turn the volume up and check the speaker. 2. Speaker. 3. System board. ThinkPad 560X (2640-60x, 70x) 41