Lenovo ThinkPad 365E-ED ThinkPad 365, SelectaDock I - Hardware Maintenance Man - Page 217

Symptom / Error Two short beeps with error codes. Two short beeps with blank screen. FRU / Action in Sequence POST error. See "Numeric Error Codes" on page 199. 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 193. 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 LCD-Related Symptoms Important The LCD for the notebook computer contains over 921 000 thin-film transistors (TFTs). A small number of missing, discolored, or lighted dots (on all the time) is characteristic of TFT LCD technology, but excessive pixel problems can cause viewing concerns. The LCD should be replaced if the number of dots satisfies the following condition: The number of missing, discolored, or lighted dots in any background is 21 or more. Symptom / Error No beep, power-on indicator on, and a blank LCD during POST. FRU / Action in Sequence 1. System board 2. Subcard ThinkPad 380, 380D, 385, 385D (2635) 205