Lenovo ThinkPad 760CD ThinkPad 380, 385, 560, 560E, all 760, 765 and SelectADo - Page 241

Symptom / Error One long, 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 1. System board 2. Video card 3. LCD assembly Connect the AC Adapter or install a fully charged battery. Connect the AC Adapter or install a fully charged battery (allows system to complete shutdown before changing the battery). POST error. See "Numeric Error Codes" on page 223. 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 213. 2. System board 3. DC/DC card 4. Power sources No beep, power-on indicator on, and a blank LCD during POST. 1. System board 2. DC/DC card 3. CPU card No beep, power-on indicator on, and a blinking cursor only during POST. 1. System board 2. CPU card 3. DC/DC card No beep during POST but system runs correctly. 1. Turn the volume up and check the speaker. 2. Check whether the DSP card or Audio (ESS) card connector is loose and reseat the connector. 3. Speaker 4. DSP card/audio (ESS) card 5. DC/DC card ThinkPad 760 (9546, 9547) 229