Beep Errors; Lcd-Related Symptoms - Lenovo ThinkPad L430 Hardware Maintenance Manual

Beep errors

Table 5. Beep errors
Problem
One short beep, pause, three short beeps, pause, three
more short beeps, and one short beep
Three short beeps, pause, one short beep, pause, one
more short beep, and three short beeps
One long and two short beeps
Four cycles of four short beeps
Five short beeps
Five short beeps, pause, five short beeps, and pause

LCD-related symptoms

Important: The TFT LCD for the notebook computer contains many thin-film transistors (TFTs). The
presence of 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.
If the LCD you are servicing has two or less visible defective pixels, it should not be considered faulty.
However, if the LCD has three or more visible defective pixels, it will be deemed as defective by Lenovo and
it should be replaced.
Notes:
• This policy applies to all ThinkPad notebook computers purchased on 1 January, 2008 or later.
• Lenovo will not provide warranty replacement if the LCD is within specifications because we cannot
guarantee that any replacement LCD will have zero pixel defects.
• One pixel consists of R, G, B sub-pixels.
Table 6. LCD-related symptoms
Symptom or error
No beep, power-on indicator on, and a blank LCD during
POST.
• LCD backlight not working.
• LCD too dark.
• LCD brightness cannot be adjusted.
• LCD contrast cannot be adjusted.
• LCD screen unreadable.
• Characters missing pixels.
• Screen abnormal.
• Wrong color displayed.
Horizontal or vertical lines displayed on LCD.
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Hardware Maintenance Manual
Solution
Ensure that memory modules are installed correctly. If
they are, and you still hear the beeps, have the computer
serviced.
PCI resource allocation failure. Power off the computer
and remove the device from the ExpressCard slot. If the
beeps persist, have the computer serviced.
The video function has a problem. Have the computer
serviced.
The Security Chip has a problem. Have the computer
serviced.
The system board has a problem. Have the computer
serviced.
Continue to boot immediately when the error was
detected.
FRU or action, in sequence
System board.
1. Reseat the LCD connectors.
2. LCD assembly.
3. System board.
1. See important note for "LCD-related symptoms."
2. Reseat all LCD connectors.
3. LCD assembly.
4. System board.
LCD assembly.