Lenovo ThinkPad 760CD ThinkPad 380, 385, 560, 560E, all 760, 765 and SelectADo - Page 58
Beep Symptoms, Connect the AC Adapter
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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 unit 3. System board 4. Subcard 1. Boot device 2. System board 1. System board 2. LCD unit Connect the AC Adapter or install a fully charged battery. Connect the AC Adapter or install a fully charged battery. (Allow the system to complete shutdown before changing the battery.) POST error. See "Numeric Error Codes" on page 40. System board No Beep Symptoms Symptom / Error FRU / Action in Sequence No beep, power-on indicator not on, and a blank LCD during POST. 1. Go to "Power Systems Checkout" on page 33. 2. System board 3. Subcard 4. Power sources No beep, power-on indicator on, and a blank LCD during POST. 1. System board 2. Subcard No beep, power-on indicator on, and a blinking cursor only during POST. 1. System board 2. Subcard No beep during POST but system runs correctly. 1. Turn the volume up and check the speaker. 2. Speaker 3. System board 4. Subcard 46 IBM Mobile Systems HMM
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