IBM 570 하드웨어 매뉴얼

One beep and a blank,
unreadable, or flashing LCD

1. Reseat the LCD

 2. LCD assembly
 3. System board

One long and two short
beeps, and a blank or
unreadable LCD

 1. System board.
 2. LCD assembly.

Two short beeps with error
codes

Two short beeps with blank
screen

 1. System board.

No beep, power-on indicator
on, LCD blank, and no
POST

1. Ensure that every

connector is
connected tightly and
correctly.

 2. DIMM.
 3. System board.

No beep, power-on indicator
on, and LCD blank during
POST

 1. Reseat DIMM.
 2. System board.

No beep, during POST but
system runs correctly

 1. Speaker.

The TFT LCD for the notebook computer contains
many thin-film transistors (TFTs). A small number of
dots that are missing, discolored, or always lighted is
characteristic of TFT LCD technology, but excessive
pixel problems can cause viewing concerns. The LCD
should be replaced if the number of missing,
discolored, or lighted dots in any background is:

SVGA (12.1 in.): 5 or more bright dots, 5 or
more dark dots or a total of 9 or more bright and
dark dots.

XGA (13.3 in.): 8 or more bright dots, 8 or more
dark dots or a total of 9 or more bright and dark
dots.

   

ThinkPad 570 and 570E