Figure 12: Illumination fault troubleshooting 2
Start
Are the keyboard
LEDs working?
Are the display LEDs
and/or Flashlight
working?
Change X301
Check X301 connector
contacts and solder
joints. Are they OK?
Change UI PWB
Are the LEDs working now?
No
VLED
No
Yes
No
No
Flashlight
Retest failing UI PWB
Check V311,V312,
R311,R312 and R307
If not OK, change
defect part
Yes
KB LED
Yes
ICQ: 343183001 QQ: 35070846 Email: [email protected]