Beep symptomsSymptom or error FRU or action, in sequenceOne beep and a blank,unreadable, or flashing LCD.1. Reseat the LCDconnector.2. LCD assembly.3. External CRT.4. System board.One long and two short beeps,and a blank or unreadableLCD.1. System board.2. LCD assembly.3. DIMM.Two short beeps with errorcodes.POST error. See “Numericerror codes” on page 54.Two short beeps and a blankscreen.1. System board.2. DIMM.Three short beeps, pause,three more short beeps, andone short beep.1. DIMM.2. System boardOne short beep, pause, threeshort beeps, pause, three moreshort beeps, and one shortbeep.Only the cursor appears. Reinstall the operatingsystem.Four cycles of four short beepsand a blank screen.System board (IBM securitychip)Five short beeps and a blankscreen.System boardNo-beep symptomsSymptom or error FRU or action, in sequenceNo beep, power-on indicatoron, LCD blank, and no POST.1. Make sure that everyconnector is connectedtightly and correctly.2. DIMM.3. System board.No beep, power-on indicatoron, and LCD blank duringPOST.1. Reseat DIMM.2. System board.The power-on password promptappears.A power-on password or asupervisor password is set.Type the password and pressEnter.The hard-disk password promptappears.A hard-disk password is set.Type the password and pressEnter.The DOS full screen lookssmaller than it should.Start the ThinkPadConfiguration program and setthe Screen expansionfunction.Symptom-to-FRU index60 R50/R50p, R51 Series
